Atlanticare Medical Center v. Division of Medical Assistance ( 2020 )


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    SJC-12828
    ATLANTICARE MEDICAL CENTER & others1 vs.    DIVISION OF MEDICAL
    ASSISTANCE.
    Suffolk.     February 10, 2020. - July 21, 2020.
    Present:   Gants, C.J., Lenk, Gaziano, Lowy, Budd, Cypher, &
    Kafker, JJ.
    Medicaid. Division of Medical Assistance. Public Welfare,
    Medical assistance benefits. Regulation. Hospital,
    Medicaid reimbursement. Medicare. Judgment, Relief from
    judgment. Practice, Civil, Relief from judgment.
    Civil action commenced in the Superior Court Department on
    April 6, 2000.
    Following review by this court, 
    439 Mass. 1
    (2003), a
    motion for relief from judgment, filed on September 28, 2018,
    was heard by Debra A. Squires-Lee, J.
    The Supreme Judicial Court granted an application for
    direct appellate review.
    Douglas S. Martland, Assistant Attorney General, for the
    defendant.
    Charlene E. Kent for the plaintiffs.
    1 Salem Hospital; Lawrence General Hospital; Hale Hospital;
    Beverly Hospital; and Deaconess Waltham Hospital.
    2
    KAFKER, J.     In the instant case we are asked to revisit a
    decision issued by this court in 2003 involving State Medicaid
    reimbursements, in light of subsequent developments to the
    relevant Federal law.     At issue is the State's Medicaid program,
    MassHealth, which provides insurance for indigent residents of
    the Commonwealth.2    In Atlanticare Med. Ctr. v. Commissioner of
    the Div. of Med. Assistance, 
    439 Mass. 1
    , 3, 5 (2003)
    (Atlanticare I), this court affirmed a judgment declaring that
    part of a State Medicaid regulation, 130 Code Mass. Regs.
    § 450.316(E) (1998),3 was inconsistent with the Federal Medicaid
    scheme.   The regulatory provision required health care providers
    to return payments to MassHealth where a third-party insurer was
    later identified as liable for the payment that MassHealth had
    already paid out.
    Id. at 2.
      We concluded that the Federal
    Medicaid scheme tasked the State Medicaid agency, not individual
    providers, with seeking reimbursement from liable third-party
    2 At the time the original complaint was filed, the Division
    of Medical Assistance was designated as the "single State
    agency" responsible for administering the State Medicaid plan.
    See 42 U.S.C. § 1396a(a)(5) (State Medicaid plans must designate
    single State agency to administer plan). In 2003, however, the
    Executive Office of Health and Human Services was deemed to be
    the single State agency responsible for administration of the
    program. See G. L. c. 118E, § 1, inserted by St. 2003, c. 26,
    § 308. For simplicity, we will refer to the defendant as
    "MassHealth" throughout this opinion.
    3 The provision at issue in this regulation has since been
    moved from subsection (E) to subsection (F) of 130 Code Mass.
    Regs. § 450.316 (2019).
    3
    insurers, including Medicare.
    Id. at 6-7.
      We thus held that
    the State regulation impermissibly shifted the burden for
    seeking reimbursement onto health care providers, in violation
    of the Federal statutory scheme.
    Id. at 14.
      In so holding, we
    rejected the argument that MassHealth would be unable to
    directly seek reimbursement where the liable third party at
    issue was Medicare.
    Id. at 11
    .
    
    Pursuant to our ruling in Atlanticare I, MassHealth began
    seeking reimbursements directly from Medicare, rather than from
    providers, where Medicare was identified as a liable third-party
    insurer.   The Center for Medicare & Medicaid Services (CMS), a
    division of the Department of Health and Human Services (HHS)
    that oversees the administration of Medicaid and Medicare at the
    Federal level, refused to issue reimbursements from Medicare to
    MassHealth, however.   See Daley v. Secretary of the Executive
    Office of Health & Humans Servs., 
    477 Mass. 188
    , 190 (2017);
    Massachusetts v. Sebelius, 
    638 F.3d 24
    , 25 (1st Cir. 2011)
    (Sebelius).   CMS maintained that Medicare funds could only be
    paid out to providers, not MassHealth, and that MassHealth could
    only obtain Medicare reimbursements by going through providers.
    
    Sebelius, supra
    .   MassHealth brought suit against CMS in Federal
    court, challenging this position.
    Id. at 29.
      In a 2011 ruling,
    the United States Court of Appeals for the First Circuit agreed
    with CMS's position, and held that the Federal Medicare scheme
    4
    prohibited State Medicaid agencies, including MassHealth, from
    receiving funds from Medicare.     See
    id. at 36.
      At around the
    same time, a Federal Medicare regulation was amended to
    acknowledge the practice of State Medicaid agencies obtaining
    Medicare reimbursements through providers, rather than seeking
    such reimbursements directly from Medicare.     See 42 C.F.R.
    § 424.44(b)(3) (2019).
    In light of the First Circuit's holding and the amendment
    to 42 C.F.R. § 424.44(b), MassHealth sought to modify the
    declaratory judgment and restore MassHealth's ability to obtain
    reimbursements from providers, rather than liable third parties.
    For the reasons discussed infra, we conclude that MassHealth has
    demonstrated a sufficient change in circumstances to warrant
    modification of the judgment.     We further conclude, however,
    that only a narrow modification of the judgment is necessary to
    allow MassHealth to seek reimbursement where the liable third
    party is Medicare.   Accordingly, we order that this case be
    remanded to the Superior Court for modification of the judgment
    in accordance with this opinion.
    1.   Background.     a.   Overview of Medicaid and Medicare.
    Medicare is a Federal program that provides health care benefits
    to the elderly and disabled.     See Briggs v. Commonwealth, 
    428 Mass. 241
    , 243 (1999); 42 U.S.C. §§ 1395 et seq.     Medicare is
    supported entirely by Federal funds and is administered by the
    5
    Federal government.     See 
    Briggs, supra
    .    Medicaid, by contrast,
    is a health care program designed to assist the needy and
    indigent.    See id.; 42 U.S.C. § 1396 et seq.     Unlike Medicare,
    Medicaid follows a model of "cooperative federalism" between the
    State and Federal governments (citation omitted).       See Harris v.
    McRae, 
    448 U.S. 297
    , 308 (1980) (McRae).       State participation in
    Medicaid is voluntary, but those States that choose to
    participate must develop a State plan in compliance with Federal
    requirements.    See Massachusetts Eye & Ear Infirmary v.
    Commissioner of the Div. of Med. Assistance, 
    428 Mass. 805
    , 812
    (1999).   State Medicaid plans must comply with requirements set
    forth in the Federal statutory scheme, as well as Federal
    regulations promulgated by HHS.     See
    id. In exchange,
    "the
    Federal Government agrees to pay a specified percentage of 'the
    total amount expended . . . as medical assistance under the
    State plan . . . ."     McRae, supra, quoting 42 U.S.C.
    § 1396b(a)(1).   Although States must comply with Federal
    requirements, Medicaid is designed to provide some flexibility
    to the States to formulate a plan tailored to each State's
    individual needs.     See Danvers Pathology Assocs., Inc. v.
    Atkins, 
    757 F.2d 427
    , 428 (1st Cir. 1985).
    Eligibility for Medicaid and Medicare are not mutually
    exclusive.   An individual who is both elderly and indigent may
    be "dual eligible[]" for both programs.       See Briggs, 
    429 Mass. 6
    at 244.   See also Connecticut Dep't of Social Servs. v. Leavitt,
    
    428 F.3d 138
    , 141 (2d Cir. 2005) (Leavitt) ("Because elderly
    Americans are covered by Medicare, and poor Americans are
    covered by Medicaid, the elderly poor are covered by both
    programs.   These beneficiaries are known as 'dual eligibles'").
    Where an individual is dual eligible, and receives a health care
    service that could be covered by either Medicare or Medicaid,
    Medicare is to pay in the first instance.     See 
    Leavitt, supra
    ;
    42 U.S.C. § 1396a(a)(25)(A).     This is because Medicaid is
    designed to be a "payer of last resort."     Arkansas Dep't of
    Health & Human Servs. v. Ahlborn, 
    547 U.S. 268
    , 291 (2006).
    Under this principle, Medicaid is not to be used to fund a
    health care expense where another funding resource is available.
    Shweiri v. Commonwealth, 
    416 Mass. 385
    , 388–389 (1993).        The
    Federal statutory and regulatory scheme outlines two methods for
    ensuring that Medicaid remain the payer of last resort where
    another funding resource is identified:     "cost avoidance" and
    "pay and chase."   See Miller v. Gorski Wladyslaw Estate, 
    547 F.3d 273
    , 278 (5th Cir. 2008).
    i.    Cost avoidance.   Cost avoidance is the primary method
    of ensuring that Medicaid funds are not used where another
    funding resource is available.    See
    id. States are
    required to
    "take all reasonable measures to ascertain the legal liability
    of third parties . . . to pay for care and services available
    7
    under the plan" before paying out Medicaid funds.     See 42 U.S.C.
    § 1396a(a)(25)(A).    A third party is defined as "any individual,
    entity or program that is or may be liable to pay all or part of
    the expenditures for medical assistance furnished under a State
    plan."   42 C.F.R. § 433.136 (2010).    Reasonable measures include
    the submission of a plan to the Secretary of HHS "for pursuing
    claims against such third parties."     42 U.S.C.
    § 1396(a)(25)(A)(ii).     In accordance with these requirements,
    Massachusetts has promulgated a regulation mandating that
    providers make "diligent efforts to obtain payment first from
    other resources . . . so that the MassHealth agency will be the
    payer of last resort."     130 Code Mass. Regs. § 450.316 (2019).
    Where a State is able to establish the "probable existence"
    of third-party liability at the time when a claim is filed, "the
    agency must reject the claim and return it to the provider for a
    determination of the amount of liability."     42 C.F.R.
    § 433.139(b)(1) (2019).     Once such a liability determination is
    made, "the agency must then pay the claim to the extent that
    payment allowed under the agency's payment schedule exceeds the
    amount of the third party's payment."     42 C.F.R.
    § 433.139(b)(1).     Where probable third-party liability cannot be
    established, or where benefits are not available at the time the
    claim is filed, the State Medicaid agency is responsible for
    paying the claim.    See 42 C.F.R. § 433.139(c).
    8
    ii.     Pay and chase.   In the regular course, the
    Commonwealth's "diligent efforts" requirement ensures that
    MassHealth does not pay for health care services that could have
    been paid for by a third-party insurer.     See 130 Code Mass.
    Regs. § 450.316.    Instances arise, however, where a liable third
    party is identified after Medicaid has already paid the
    provider.   For example, individuals who are eligible for
    Medicaid may become retroactively eligible for Medicare as well.
    See, e.g., 42 C.F.R. § 406.6(d)(4) (2019) (individual who signs
    up for Medicare Part A coverage at some point after he or she
    first becomes eligible is entitled to retroactive benefits).
    Such individuals are referred to as "retroactive dual
    eligibles."   In such instances, Medicaid employs the secondary
    "pay and chase" method of handling third-party liability, which
    consists of the following:
    "in any case where such a [third-party] legal liability is
    found to exist after medical assistance has been made
    available on behalf of the individual and where the amount
    of reimbursement the State can reasonably expect to recover
    exceeds the costs of such recovery, the State or local
    agency will seek reimbursement for such assistance to the
    extent of such legal liability."
    42 U.S.C. § 1396a(a)(25)(B).
    Federal regulations further mandate that
    "if [a State Medicaid] agency learns of the existence of a
    liable third party after a claim is paid, or benefits
    become available from a third party after a claim is paid,
    the agency must seek recovery of reimbursement within
    [sixty] days after the end of the month it learns of the
    9
    existence of the liable third party or benefits become
    available."
    42 C.F.R. § 433.139(d)(2).4   Reimbursement is to be sought
    "unless the agency determines that recovery would not be cost
    effective in accordance with" 42 C.F.R. § 433.139 (f).      42
    C.F.R. § 433.139(d)(3).   Recovery is considered cost effective
    under 42 C.F.R. § 433.139(f) where "the amount [the State
    Medicaid agency] reasonably expects to recover will be greater
    than the cost of recovery."   42 C.F.R. § 433.139(f)(1).     A
    State's Medicaid "plan must specify the threshold amount or
    other guideline that the agency uses in determining whether to
    seek recovery of reimbursement from a liable third party, or
    describe the process by which the agency determines that seeking
    recovery of reimbursement would not be cost effective."      42
    C.F.R. § 433.139(f)(2).
    iii.   Approaches to pay and chase.   To address the
    implementation of pay and chase for instances of post-payment
    4 A State agency may request a waiver of the sixty-day
    deadline for seeking reimbursement. See 42 C.F.R.
    § 433.139(e)(1). In order to obtain a waiver of this
    requirement, however, a State agency must demonstrate that
    imposing the sixty-day requirement is not cost effective. See
    42 C.F.R. § 433.139(e)(1). In order to do so, the agency must
    provide "adequate documentation" to the Center for Medicare &
    Medicaid Services (CMS) as to the lack of cost effectiveness,
    examples of which include "costs associated with billing, claims
    recovery data, and a State analysis documenting a cost-effective
    alternative that accomplishes the same task." 42 C.F.R.
    § 433.139(e)(1)(ii).
    10
    third-party liability, Massachusetts promulgated the following
    regulation:   "[i]f a third-party resource is identified after
    the provider has already billed and received payment from the
    MassHealth agency, the provider must promptly return any payment
    it received from the MassHealth agency.     The provider must bill
    all third-party resources before resubmitting a claim to the
    MassHealth agency."    130 Code Mass. Regs. § 450.316(F).      In
    other words, this regulation implements pay and chase by
    allowing MassHealth to void a provider's claim and recoup the
    money from the provider.   The provider is then left to seek
    payment from the third party itself, whether the third party is
    a private insurer or Medicare.    The instant litigation arose out
    of a challenge to the legality of this regulation.
    An alternative method for implementing pay and chase, and
    the one that MassHealth presently relies on, is known as demand
    billing.   Under this method of recovery, MassHealth requests
    that the provider submit a bill to Medicare and repay MassHealth
    once Medicare has paid the provider.      MassHealth contends that
    demand billing results in significant delays in recovery, and
    cannot be utilized where a Medicaid recipient becomes
    retroactively eligible for Medicare more than twelve months
    after the date of service, due to Medicare filing deadlines.
    b.     Procedural history.   i.   Initiation of suit and
    Atlanticare I.   In 1998, MassHealth brought enforcement actions
    11
    against the plaintiff hospitals, seeking reimbursement for
    Medicaid funds that had been paid out to the providers.
    Atlanticare 
    I, 439 Mass. at 4-5
    .   As this court explained:
    "In the three years prior to [MassHealth]'s enforcement
    action, each hospital had provided medical services to
    individuals deemed eligible for Medicaid benefits. It is
    undisputed that, in all but two instances not at issue
    here, the hospitals made diligent efforts to identify
    liable third-party insurers, in conformity with
    [MassHealth]'s due diligence regulation. When the
    hospitals were unable to identify liable third-party
    insurers, they sought and received payment from
    [MassHealth]. Subsequently, in 1998, [MassHealth] informed
    the hospitals that it had identified third parties
    responsible for the claims, and, pursuant to the
    reimbursement regulation, ordered the hospitals to return
    the Medicaid payments to [MassHealth] and to rebill the
    liable third parties. In some instances, Medicare was the
    newly discovered third party; the patients serviced by the
    hospitals in those instances had become retroactively
    eligible for Medicare benefits. In those instances, no
    amount of 'diligent efforts' by the healthcare providers
    would have identified a liable third-party insurer --
    Medicare -- as Medicare provided the insurance coverage
    retroactively, i.e., only after the healthcare services had
    been provided. The remaining instances involved private
    insurers."
    Id. MassHealth prevailed
    in the administrative decisions that
    ensued.   See
    id. at 5.
      The hospitals sought review in Superior
    Court, arguing that Federal law mandated that the State Medicaid
    agency, rather than the health care provider, seek reimbursement
    from liable third parties.
    Id. at 3,
    5.   A judge in the
    Superior Court ruled in favor of the hospitals.
    Id. at 3.
      In
    so ruling, the judge "declared the regulation unlawful to the
    extent that it required the hospitals to return payments to
    12
    [MassHealth] and rebill liable third parties."
    Id. at 5.
    MassHealth appealed, and this court transferred the case from
    the Appeals Court on its own motion.
    Id. at 3.
    In March 2003, we issued a decision affirming the Superior
    Court's ruling and concluding that Federal law required
    MassHealth to seek reimbursements directly from liable third
    parties, including Medicare.    See
    id. at 5.
      We held that "[t]he
    natural reading of the text of [42 U.S.C.] § 1396a(a)(25)(B) is
    that the State or local agency must seek reimbursement from a
    liable third party, provided it is cost effective to do so."
    Id. at 6.
       We also based our holding on the legislative history,
    the corresponding Federal regulation, and the then-current 1990
    State Medicaid manual issued by the Health Care Financing
    Administration (HCFA).5
    Id. at 8-10.
      More specifically, we
    observed that 42 U.S.C. § 1396a(a)(25)(B) made numerous
    references to liable third parties, but made no mention of
    providers.   Atlanticare I, supra at 6-7.    The statute's
    legislative history also indicated that Congress contemplated
    seeking reimbursement from "liable third parties" (emphasis
    omitted).
    Id. at 8.
      The cost-benefit analysis mandated by the
    statute further implied that agencies would seek recovery from
    5 The Health Care Financing Administration was the
    predecessor to CMS. Massachusetts v. Sebelius, 
    638 F.3d 24
    , 28
    n.6 (1st Cir. 2011).
    13
    third parties, as the cost of seeking recovery from a provider
    would generally be de minimis.
    Id. at 7.
      Additionally, the
    corresponding Federal regulations made explicit reference to
    seeking reimbursement "from a liable third party" and similarly
    contained cost-benefit analysis provisions (emphasis omitted).
    Id. at 9.
      Finally, the 1990 HCFA manual set forth a pay and
    chase method of reimbursement that required the State Medicaid
    agency to "seek recovery of reimbursement from the third party"
    (emphasis omitted).
    Id. at 10.
    On this basis, we concluded that 42 U.S.C.
    § 1396a(a)(25)(B) required State Medicaid agencies to seek
    reimbursement directly from the liable third party, not the
    health care provider.     Atlanticare 
    I, 439 Mass. at 6-7
    .     We
    further stated that this interpretation of the statute "would be
    entirely unremarkable were it not for [MassHealth's] view,
    agreed to by the hospitals, that it cannot recover costs from
    the liable third party when that party is Medicare."
    Id.
    at 11
    .
    
    This court explicitly rejected that view, as we were "not
    persuaded that it is impossible for [MassHealth] to obtain
    reimbursement from Medicare."
    Id. ii. Post-Atlanticare
    I developments.     A few weeks after
    this court released its decision in Atlanticare I, CMS issued a
    letter from the State Medicaid director clarifying CMS's policy
    as to the recovery of Medicaid payments for individuals who
    14
    become retroactive dual eligibles.    The letter indicated that,
    as a general matter, where Medicaid learns of a liable third
    party after a claim is paid, or where retroactive benefits
    become available after a claim is paid, State Medicaid agencies
    "must seek recovery from that third party."    The letter went on
    to explain, however, that where the liable third party is
    Medicare, neither the Federal statutory scheme nor Federal
    regulations prohibit a State Medicaid agency from recovering its
    payment directly from the provider.    The defendant promptly
    filed a petition for rehearing with this court in May 2003,
    citing to the April 2003 letter from CMS.     The petition was
    denied without further comment.
    CMS sent a letter dated December 30, 2003, to MassHealth in
    response to questions that MassHealth had posed to the agency.
    The letter explained CMS's position that the statute does
    require the State to seek recovery from the liable third party,
    but that where the liable third party is Medicare "there is no
    statutory authority under Medicare to allow a [S]tate to seek
    recovery and be paid directly from Medicare."    In such
    instances, CMS wrote, "the [S]tate may timely request the
    provider to submit a bill timely to Medicare."
    MassHealth filed an emergency motion to modify the
    declaratory judgment, in light of the April 2003 and December
    2003 letters from CMS, arguing that they constituted changed
    15
    circumstances warranting a modification of the declaratory
    judgment, pursuant to Mass. R. Civ. P. 60 (b) (5), 
    365 Mass. 828
    (1974).6   The Superior Court judge denied the motion, concluding
    that none of the arguments advanced by the defendant
    "establishes to this [c]ourt's satisfaction that there is no
    possible way for [MassHealth] to recover from Medicare."     The
    judge also concluded that MassHealth's proposed modification to
    the declaratory judgment was not suitably tailored to the
    changed circumstance, because it "does not resolve the problem,"
    but simply shifts the administrative costs from MassHealth onto
    the providers.
    In July 2004, a declaratory judgment was entered in the
    Superior Court after rescript which provided in relevant part:
    "It is further DECLARED that [MassHealth] lacks the
    authority to implement 130 Code Mass. Regs. § 450.316(E)
    [now renumbered § 450.316(F)] to the extent that the
    regulation, by requiring hospitals to refund Medicaid
    payments to [MassHealth] after the hospitals have complied
    6   Rule 60 provides in relevant part:
    "On motion and upon such terms as are just, the court may
    relieve a party or his legal representative from a final
    judgment, order, or proceeding for the following reasons:
    . . . (5) the judgment has been satisfied, released, or
    discharged, or a prior judgment upon which it is based has
    been reversed or otherwise vacated, or it is no longer
    equitable that the judgment should have prospective
    application . . . . The motion shall be made within a
    reasonable time . . . . A motion under this subdivision
    (b) does not affect the finality of a judgment or suspend
    its operation."
    Mass. R. Civ. P. 60 (b), 
    365 Mass. 828
    (1974).
    16
    with [MassHealth]'s due diligence regulation (130 Code
    Mass. Regs. § 450.316) and received payment for their
    services from [MassHealth] and [MassHealth] subsequently
    learns that a third-party insurer (including Medicare) is
    responsible for payment for all or part of the hospital's
    services, is inconsistent with the Supreme Judicial Court's
    interpretation of 42 U.S.C. § 1396a(a)(25)(B)."
    iii.   First Circuit decision.    Subsequent to these
    proceedings, MassHealth attempted to recover reimbursements for
    retroactive dual eligibles directly from Medicare.    See
    
    Sebelius, 638 F.3d at 25
    .   CMS refused to reimburse MassHealth,
    however, maintaining its position that MassHealth must seek such
    reimbursements from providers, not Medicare.
    Id. The Commonwealth
    brought suit in Federal court.    See
    id. A judge
    in
    the Federal District Court for the District of Massachusetts
    ruled that the Medicare statute prohibited MassHealth from
    recovering reimbursements directly from CMS.
    Id. On appeal,
    the First Circuit affirmed the District Court's
    ruling.   In so doing, it emphasized that the Medicare statute
    required that a Medicare "payment for services furnished an
    individual may be made only to providers of services."
    Id. at 31,
    quoting 42 U.S.C. § 1395f(a).    Although recognizing that the
    statute was not explicit on "whether the Commonwealth, which is
    not a provider, may recover reimbursement directly from Medicare
    in cases of retroactive dual eligibility," the First Circuit
    concluded that "[i]n this statutory context, it is most natural
    to read reimbursement as a particular type of payment."
    17
    
    Sebelius, 638 F.3d at 31
    , 32.   As "[t]he Medicare statute
    equates reimbursement and payment and does not allow non-
    providers to receive payments from Medicare," the Commonwealth
    could not recover directly from Medicare.
    Id. at 31.
      The First
    Circuit further noted that the Commonwealth "is not included
    among any of the express allowances in the Medicare statute for
    non-providers to receive payments."
    Id. The First
    Circuit also provided an "alternative holding"
    that CMS's interpretation of its regulations as prohibiting
    direct reimbursement to State Medicaid agencies was entitled to
    deference.   
    Sebelius, 638 F.3d at 33
    .     In this regard, the First
    Circuit had a much more expansive record of the agency's
    interpretation than was presented to this court, including the
    letter dated December 2003, which stated that "there is no
    statutory authority under Medicare to allow a State to seek
    recovery and be paid directly from Medicare," as well as a
    letter from CMS to the Commonwealth dated June 2005 that
    reiterated that "there is no statutory authority for reimbursing
    Medicaid directly for services rendered to Medicare
    beneficiaries."
    Id. at 34.
    Given the statutory language and CMS's regulatory guidance,
    the First Circuit determined that the Commonwealth could not
    seek direct reimbursement from Medicare but would instead need
    to utilize another means of recovery.      The First Circuit
    18
    determined that the Commonwealth could nonetheless recover
    reimbursements "by asking providers to return [S]tate Medicaid
    funds," as the Federal statutory scheme did not preclude
    MassHealth from doing so.
    Id. at 32.
      This procedure, known as
    demand billing, was apparently raised by CMS as a viable
    alternative to direct reimbursement from Medicare.      See
    id. at 34.
      The First Circuit also considered "CMS bound by its
    representation as to the mechanisms available for the
    Commonwealth to seek and recover reimbursement."
    Id. at 36.
    In the wake of the First Circuit's decision, MassHealth
    began using demand billing to address the issue of retroactive
    dual eligibles.     As discussed, under this method of recovery,
    MassHealth requests that the provider submit a bill to Medicare
    and repay MassHealth once Medicare has paid the provider.
    According to MassHealth, this solution works, but only to a
    point.      Because Medicare requires that providers submit claims
    within twelve months of the date of service, MassHealth asserts
    that it cannot rely on demand billing where a Medicaid recipient
    becomes retroactively eligible for Medicare more than twelve
    months after the day of service, unless the State first voids
    the Medicaid payment.
    iv.    Amendment of Medicare regulation.   A few months before
    the First Circuit issued its decision, a Federal Medicare
    regulation pertaining to the deadline for filing certain
    19
    Medicare claims was amended, effective January 1, 2011.7   The
    amendment followed the passage of the Affordable Care Act, which
    had altered Medicare filing deadlines.8   See Pub. L. No. 111-148,
    7 The regulation applies to both services furnished under
    Part A of Medicare as well as services furnished under Part B,
    where applicable. See 75 Fed. Reg. 73170, 73450 (Nov. 29,
    2010). See Briggs v. Commonwealth, 
    429 Mass. 241
    , 243 (1999)
    ("Medicare Part A essentially covers hospital, post-hospital,
    and other inpatient services, and coverage is automatic. . . .
    Medicare Part B is a supplemental, voluntary insurance program
    providing coverage for physician and outpatient services"
    [citation and footnote omitted]).
    8 In their entirety, the two filing exceptions under 42
    C.F.R. § 424.44(b)(2)-(b)(3) (2019) provide:
    "(2) The time for filing a claim will be extended if CMS or
    one of its contractors determines that a failure to meet
    the deadline in paragraph (a) of this section is caused by
    all of the following conditions:
    "(i) At the time the service was furnished the beneficiary
    was not entitled to Medicare.
    "(ii) The beneficiary subsequently received notification of
    Medicare entitlement effective retroactively to or before
    the date of the furnished service.
    "(3) The time for filing a claim will be extended if CMS or
    one of its contractors determines that a failure to meet
    the deadline in paragraph (a) of this section is caused by
    all of the following conditions:
    "(i) At the time the service was furnished the beneficiary
    was not entitled to Medicare.
    "(ii) The beneficiary subsequently received notification of
    Medicare entitlement effective retroactively to or before
    the date of the furnished service.
    20
    § 6404(a)(1), 124 Stat. 767 (2010).   The regulatory amendments
    allowed for new exceptions to the Medicare filing deadline in
    light of these statutory changes.
    The first exception provides that the filing deadline will
    be extended if the failure to meet the deadline is due to the
    fact that:   "(i) [a]t the time the service was furnished the
    beneficiary was not entitled to Medicare;" and "(ii) [t]he
    beneficiary subsequently received notification of Medicare
    entitlement effective retroactively to or before the date of the
    furnished service."   42 C.F.R. § 424.44(b)(2).   In such
    "(iii) A State Medicaid agency recovered the Medicaid
    payment for the furnished service from a provider or
    supplier 6 months or more after the service was furnished."
    The extensions afforded to each exception are as follows:
    "(ii) If CMS or one of its contractors determines that both
    of the conditions are met in paragraph (b)(2) of this
    section but that all of the conditions in paragraph (b)(3)
    are not satisfied, the time to file a claim will be
    extended through the last day of the sixth calendar month
    following the month in which either the beneficiary or the
    provider or supplier received notification of Medicare
    entitlement effective retroactively to or before the date
    of the furnished service.
    "(iii) If CMS or one of its contractors determines that all
    of the conditions are met in paragraph (b)(3) of this
    section, the time to file a claim will be extended through
    the last day of the sixth calendar month following the
    month in which the State Medicaid agency recovered the
    Medicaid payment for the furnished service from the
    provider or supplier."
    42 C.F.R. § 424.44(b)(5).
    21
    instances, the filing deadline will be extended six months from
    the date that the beneficiary or provider is notified of
    retroactive Medicare entitlement.   42 C.F.R. § 424.44(b)(5)(ii).
    The second exception provides that the filing deadline will
    be extended if the failure to meet the deadline is due to the
    above two conditions, along with a third condition:    that the
    "State Medicaid agency recovered the Medicaid payment for the
    furnished service from a provider or supplier [six] months or
    more after the service was furnished" (emphasis added).     42
    C.F.R. § 424.44(b)(3).   In such instances, the filing deadline
    will be extended six months from the date "in which the State
    Medicaid agency recovered the Medicaid payment for the furnished
    service from the provider or supplier" (emphasis added).    42
    C.F.R. § 424.44(b)(5)(iii).   The reference to providers in 42
    C.F.R. § 424.44(b)(3) explicitly contemplates that State
    Medicaid agencies will recover a payment from a health care
    provider where an individual becomes retroactively dual eligible
    for Medicaid and Medicare.    This particular exception to the
    filing deadline is designed to allow for providers to recover
    from Medicare in such instances, where their claim would
    otherwise be barred by the passage of time.    The Commonwealth
    contends that our ruling in Atlanticare I, which requires
    MassHealth to seek reimbursement directly from Medicare, not the
    provider, precludes the use of this procedure.
    22
    v.   Proceedings leading to the instant appeal.   On
    September 28, 2018, the defendant filed a motion for relief from
    the judgment in light of the First Circuit's decision and the
    regulatory amendment to 42 C.F.R. § 424.44.    The motion was
    denied.   The defendant appealed, and we granted the defendant's
    application for direct appellate review.
    MassHealth seeks a modification of the declaratory judgment
    such that it may seek reimbursements from providers, rather than
    continuing to seek reimbursements directly from Medicare and
    other liable third parties.9   The agency estimates that it is
    unable to recover approximately $5.3 million per year in claims
    that should have been paid out by Medicare once a recipient's
    retroactive dual eligibility became known.    MassHealth also has
    indicated that it is unaware of any State that faces the same
    prohibition on recovering Medicaid payments directly from
    providers.10
    9 Although MassHealth requests the ability to seek
    reimbursement from providers as a general matter, MassHealth
    contends that such a modification of the judgment would have
    "little, if any" impact on providers where the third-party
    insurer is not Medicare. This is because MassHealth already has
    a direct right of recovery against non-Medicare insurers under
    G. L. c. 118E, § 22, and MassHealth contends that it has a
    general practice of seeking payment directly from the private
    insurers themselves, rather than from providers.
    10CMS apparently represented to the First Circuit that the
    "standard procedure across the country" for recovering
    reimbursements from Medicare is to employ demand billing.
    23
    The agency contends that, in light of the First Circuit's
    ruling, it has been placed in an untenable position of
    attempting to follow two contradictory holdings:    this court's
    ruling in Atlanticare I that MassHealth must seek reimbursements
    directly from liable third parties, and the First Circuit's
    ruling that MassHealth is prohibited from seeking reimbursements
    directly from Medicare.
    2.   Discussion.   a.   Standard of review.   The defendant
    seeks a modification of the declaratory judgment pursuant to
    Mass. R. Civ. P. 60 (b) (5).   Rule 60 (b) (5) allows the court
    to relieve a party from a final judgment where "a prior judgment
    upon which it is based has been reversed or otherwise vacated,
    or it is no longer equitable that the judgment should have
    
    Sebelius, 638 F.3d at 36
    n.13. By contrast, MassHealth asserts
    that it is aware of nine other States that seek reimbursement
    directly from the provider where Medicare is the retroactively
    liable third party: Maine, Vermont, California, Ohio,
    Pennsylvania, Alabama, Wyoming, Michigan, and Minnesota.
    MassHealth has further indicated that it is unaware of any State
    that requires its State Medicaid agency to seek reimbursements
    from Medicare directly.
    It would appear, however, that a few States do in fact
    require their State Medicaid agency to pursue Medicare directly.
    See Tex. Government Code § 531.0392 (b) (2020) ("The commission
    shall obtain Medicaid reimbursement from each fiscal
    intermediary who makes a payment to a service provider on behalf
    of the Medicare program"). See also South Dakota Admin. Rules
    § 22:02:02:10 (2020) ("[A] county must pursue the availability
    of a third-party payment source . . . such as Medicare").
    Exactly how that is done is not clear from the record or the
    regulatory language.
    24
    prospective application."    As the 1973 Reporter's Notes
    indicate, Rule 60 (b) (5) is designed to allow "relief from a
    judgment which was valid and equitable when rendered but whose
    prospective application has, because of changed conditions,
    become inequitable."   Reporters' Notes (1973) to Rule 60, Mass.
    Ann. Laws Court Rules, Rules of Civil Procedure (LexisNexis
    2019).   The rule "derives from the traditional power of a court
    of equity to modify its decree in light of changed
    circumstances."   Mitchell v. Mitchell, 
    62 Mass. App. Ct. 769
    ,
    778 (2005).   The moving party thus bears the burden of
    demonstrating a "significant change in circumstances warranting
    revision" of the judgment (quotations and citation omitted).
    Great Woods, Inc. v. Clemmey, 
    89 Mass. App. Ct. 788
    , 795 (2016).
    See MacDonald v. Caruso, 
    467 Mass. 382
    , 388-389 (2014).     One
    example of such changed circumstances would be a "later change
    in the law[,] such as when a statute is amended."    Clean Harbors
    of Braintree, Inc. v. Board of Health of Braintree, 
    415 Mass. 876
    , 884–885 (1993).   See Horne v. Flores, 
    557 U.S. 433
    , 447-448
    (2009) (under Federal analog, changed circumstances, such as
    "changes in governing law or its interpretation by the courts,"
    may "warrant reexamination of the original judgment").
    The resolution of motions for relief from judgment "rests
    in the discretion of the trial judge."    Wojcicki v. Caragher,
    
    447 Mass. 200
    , 209 (2006).   Accordingly, the "denial of a motion
    25
    under Rule 60 (b) will be set aside only on a clear showing of
    an abuse of discretion."   Murphy v. Administrator of the Div. of
    Personnel Admin., 
    377 Mass. 217
    , 227 (1979).
    b.   Timing of motion.   As a threshold matter, the
    plaintiffs contend that the defendant's motion is untimely.      The
    plaintiffs note that both changed circumstances cited by
    MassHealth -- the amendment to 42 C.F.R. § 424.44 and the First
    Circuit's ruling -- occurred in 2011, seven years before
    MassHealth sought modification of the judgment.    The motion
    judge observed that MassHealth "has offered no reason for having
    waited seven plus years to bring the instant [m]otion," but did
    not go so far as to conclude that the motion was untimely.
    A motion under Mass. R. Civ. P. 60 (b) (4)-(6) must be made
    "within a reasonable time," which is to be determined in light
    of all of the circumstances of the case.   Such determinations,
    however, are "addressed solely to the judge's discretion."
    Chavoor v. Lewis, 
    383 Mass. 801
    , 805 n.4 (1981).   "In
    determining whether a motion was filed within a reasonable time,
    a judge may consider the reasons for delay; the ability of the
    movant to learn of the grounds earlier; prejudice to the
    parties, if any; and the important interest of finality."       Owens
    v. Mukendi, 
    448 Mass. 66
    , 74 (2006).
    There is no set formula for determining what constitutes a
    "reasonable time" for the purposes of Mass. R. Civ. P. 60 (b)
    26
    (4)-(6).   It is indisputable that a significant period of time
    elapsed between the First Circuit's ruling and the filing of the
    Rule 60 motion in this case -- indeed a much longer span of time
    than we have deemed unreasonable in other cases.   See 
    Owens, 448 Mass. at 76-77
    and cases cited (delays of two or three years
    found to be unreasonable).   We consider this delay troubling to
    say the least, particularly given that MassHealth's
    justification for its failure to promptly seek modification of
    the judgment is somewhat murky.   At oral arguments, MassHealth
    suggested that the passage of the Affordable Care Act in 2010
    prompted a sea change in health care that required MassHealth to
    focus on more fundamental Medicaid issues, such as changes to
    eligibility requirements, and that this contributed to the
    lengthy delay in addressing the reimbursement issue.    We
    understand that the delay also may be due in part to
    MassHealth's concern that it would be asking this court to
    reconsider one of its own decisions -- indeed a decision that
    was unanimous, and in which the court summarily denied a
    petition for reconsideration, even after further regulatory
    guidance from CMS.
    More importantly, however, we recognize that clear
    resolution of this issue is critical, given the substantial
    amount of public funds at stake and the need to avoid
    conflicting interpretations by this court and the First Circuit
    27
    that would lead to confusion and administrative deadlock.     Cf.
    United States v. 119.67 Acres of Land, More or Less, Situated in
    Plaquemines Parish, State of La., 
    663 F.2d 1328
    , 1331 (5th Cir.
    1981) (motion filed under Fed. R. Civ. P. 60(b)(6) should not be
    dismissed as untimely "[g]iven the significant governmental and
    public rights involved in this controversy").    Moreover, the
    risk of prejudice to the plaintiffs of delay is diminished by
    the fact that MassHealth is only seeking a prospective
    modification of the declaratory judgment.   In light of the
    important interests at stake, the need for clarity, and the
    diminished risk of prejudice to the plaintiffs, we conclude that
    the motion is not untimely in the highly unusual circumstances
    of this case.
    c.    Existence of changed circumstances.    The judge below
    found that MassHealth had failed to demonstrate changed
    circumstances warranting modification of the declaratory
    judgment.   The judge observed that the relevant statutory
    provision at issue in Atlanticare I, 42 U.S.C.
    § 1396a(a)(25)(B), had not been amended since this court's
    ruling.   Additionally, the motion judge noted that this court
    was at least aware of the possibility that MassHealth might be
    unable to recover reimbursements directly from Medicare, but
    issued the Atlanticare I decision nonetheless.    Finally, the
    motion judge concluded that the reference to provider-based
    28
    reimbursement in 42 C.F.R. § 424.44 was too vague to constitute
    explicit recognition of a State Medicaid's agency ability to
    pursue reimbursement from a provider where the third-party
    insurer is Medicare.
    To determine whether MassHealth has demonstrated a change
    in circumstances warranting a modification of the declaratory
    judgment, we first look to the circumstances as they existed at
    the time of our ruling in Atlanticare I.    As discussed, in
    Atlanticare 
    I, 439 Mass. at 11
    , this court rejected MassHealth's
    argument that it was not possible to seek reimbursements
    directly from Medicare.   A number of reasons motivated this
    conclusion.   First, we observed that neither party had
    identified a Federal regulation specifically applicable to
    instances "in which Medicare has acknowledged a mistake in
    denying liability for a claim or has agreed to pay a claim
    retroactively."
    Id. Second, we
    identified two Federal cases,
    New York State Dep't of Social Servs. v. Bowen, 
    846 F.2d 129
    (2d
    Cir. 1988), and Michigan Dep't of Social Servs. v. Shalala, 
    859 F. Supp. 1113
    (W.D. Mich. 1994), that "rejected the rationale
    underlying [MassHealth's] position."    Atlanticare I, supra at
    11-12.   At the same time, MassHealth had "cited no case that
    supports the proposition that it cannot pursue reimbursement
    from Medicare in the circumstances of this case."
    Id. at 13.
    Third, we stated that while the HCFA had issued a letter in 1991
    29
    reflecting a "general position" that State Medicaid agencies
    could not recover from Medicare, we considered it "of no
    consequence that HCFA has not yet adopted the reasoning of
    another court to the contrary."
    Id. Fourth, we
    observed that
    "nothing in the record . . . suggest[s] that [MassHealth] has
    ever attempted to recover reimbursement from Medicare, or that
    it has been rebuffed in any attempts to do so."
    Id. And finally,
    both parties had conceded at oral arguments that "it
    might be possible for [MassHealth] to recover from Medicare."
    Id. at 11
    n.14.
    Although our reasoning was understandable at the time,
    postjudgment legal developments have altered the basis for each
    of the rationales cited.   First, while the parties were unable
    to identify a Federal regulation that specifically addressed
    retroactive Medicare liability in the context of retroactive
    dual eligibles, the amended version of 42 C.F.R. § 424.44 now
    does so, albeit obliquely.11   While § 424.44 pertains to the
    filing deadline for Medicare claims, rather than the ability to
    pay out funds to State Medicaid agencies, it explicitly
    11The oblique nature of the reference is unsurprising,
    given that Medicare, much like Medicaid, is an incredibly
    complicated statutory scheme. See Schweiker v. Gray Panthers,
    
    453 U.S. 34
    , 43 (1981). The law that established both programs
    is known for its "Byzantine construction,"
    id., which makes
    it
    "almost unintelligible to the uninitiated."
    Id., quoting Friedman
    v. Berger, 
    547 F.2d 724
    , 727 n.7 (2d Cir. 1976), cert.
    denied, 
    430 U.S. 984
    (1977).
    30
    contemplates that State Medicaid agencies will seek
    reimbursement from providers, and providers will seek payment
    from Medicare.   See Tarin v. Commissioner of the Div. of Med.
    Assistance, 
    424 Mass. 743
    , 751 (1997) (Federal Medicaid
    regulations entitled to substantial deference).   CMS's Medicare
    claims processing manual, dated January 21, 2011, similarly
    makes reference to a State Medicaid agency "recoup[ing] the
    money it paid the provider or supplier."   The April 2003 letter
    issued by CMS less than a month after our holding in Atlanticare
    I further reiterates that neither the Federal statutory scheme
    nor Federal regulations prohibit a State Medicaid agency from
    recovering its payment directly from the provider where the
    liable third party is Medicare.   Even more explicit, however, is
    CMS's December 2003 letter to MassHealth, which states that
    "there is no statutory authority under Medicare to allow a
    [S]tate to seek recovery and be paid directly from Medicare."
    In such instances, CMS stated, "the [S]tate may timely request
    the provider to submit a bill timely to Medicare."     A June 2005
    letter further confirmed that "there is no statutory authority
    for reimbursing Medicaid directly for services rendered to
    Medicare beneficiaries."   
    Sebelius, 638 F.3d at 34
    .
    As to the two cases we cited in support of MassHealth's
    ability to directly seek reimbursement from Medicare, subsequent
    developments in the case law constitute a clear change in
    31
    circumstances from Atlanticare I.    In New York State Dep't of
    Social 
    Servs., 846 F.2d at 130
    , upon which this court relied in
    Atlanticare I, the United States Court of Appeals for the Second
    Circuit held that the State Medicaid agency had standing to
    appeal from the denial of nursing home patients' Medicare
    claims.   We cited that case as suggestive of a State Medicaid
    agency's authority to seek reimbursement directly from Medicare.
    Atlanticare 
    I, 439 Mass. at 11
    .     More recently, however, in the
    context of Medicare claims for home health care services, the
    Second Circuit deferred to CMS's position that such claims must
    be filed by providers, not Medicare beneficiaries or State
    Medicaid agencies.   
    Leavitt, 428 F.3d at 146
    .   See also
    Charlotte-Mecklenburg Hosp. Auth. v. North Carolina Dep't of
    Health & Human Servs., 
    201 N.C. App. 70
    , 77 (2009) ("only
    providers of services can submit Medicare reimbursement claims
    on behalf of Medicaid recipients later determined to be eligible
    for Medicare").   In so holding, the Second Circuit concluded
    that State Medicaid agencies could obtain reimbursements from
    providers using demand billing.     See 
    Leavitt, supra
    at 149.
    Of course, the most obvious, significant change in the case
    law since Atlanticare I is that the First Circuit has now
    definitively stated that MassHealth may not seek reimbursement
    directly from Medicare.   Notably, although CMS's predecessor,
    HCFA, was not a party to Atlanticare I and did not submit an
    32
    amicus brief to the court, CMS was a party to the First Circuit
    litigation and was able to outline the agency's position
    unequivocally.   It is clear from the Sebelius litigation that
    CMS takes the position that State Medicaid agencies may not
    pursue reimbursement directly from Medicare.
    Finally, the record before us is now clear that MassHealth
    has attempted to recover from Medicare directly and has been
    unable to do so.     Initially, this was only because CMS took a
    stance that Medicare could not pay out funds to MassHealth, but
    CMS's view has now also been endorsed by the First Circuit.    In
    sum, post-Atlanticare I changes to the Federal law have made
    clear what remained ambiguous at the time of our prior decision
    -- that it is not possible for MassHealth to recover from
    Medicare directly.
    Despite these significant developments in the years since
    Atlanticare I, the plaintiffs reiterate that the language of 42
    U.S.C. § 1396a(a)(25)(B) has not changed, and the Federal
    Medicaid regulations in place at the time were adequate to
    indicate that direct recovery was not going to be possible.        For
    the reasons 
    discussed supra
    , however, we consider the law to
    have changed significantly, or at least to have been
    significantly clarified, since our original decision.
    The plaintiffs also rely on our previous discussion of the
    cost-benefit analysis requirement in Atlanticare I, arguing that
    33
    this requirement would serve little purpose if State Medicaid
    agencies were allowed to seek reimbursement from providers,
    rather than from liable third parties.   The statute premises
    reimbursement on a finding that "the amount of reimbursement the
    State can reasonably expect to recover exceeds the costs of such
    recovery."   42 U.S.C. § 1396a(a)(25)(B).   As we observed in
    passing in Atlanticare I, if a State Medicaid agency is able to
    seek reimbursement from a provider, "realistically, there are
    few instances in which the cost of such recovery would exceed
    the amount of the recovery."   Atlanticare 
    I, 439 Mass. at 7
    .
    Thus, we reasoned, if Congress intended to allow State Medicaid
    agencies to seek reimbursement from providers, this provision
    would be rendered "largely superfluous," as the cost-benefit
    analysis would reliably weigh in favor of seeking reimbursement.
    Id. Although the
    regulations are less than clear about which
    party's costs need to be considered, we recognize that
    MassHealth would be unlikely to consider reimbursement not cost
    effective if it could simply shift the costs of recovery to the
    providers.   With that consideration in mind, however, and after
    reviewing the regulations, we conclude that the costs to
    providers may and should be given consideration.
    The regulations indicate that seeking reimbursement is
    considered cost effective where "the amount [the State Medicaid
    34
    agency] reasonably expects to recover will be greater than the
    cost of recovery."     42 C.F.R. § 433.139(f)(1).   The regulations
    do not, however, define the scope of what fairly may be
    considered in calculating the "cost of recovery."      Further,
    where a State requests a waiver of the sixty-day deadline for
    seeking reimbursement due to lack of cost effectiveness, see
    note 
    4, supra
    , the regulation explains that providing adequate
    documentation of such would include "costs associated with
    billing, claims recovery data, and a State analysis documenting
    a cost-effective alternative."    42 C.F.R. § 433.139(e)(1)(ii).
    Albeit that these examples are in reference to requesting a
    waiver of the sixty-day deadline, we find these examples also to
    be illustrative of the kinds of information that may be
    considered in conducting a cost-benefit analysis for the purpose
    of seeking reimbursement; and two of the three examples provided
    easily could pertain to the costs associated with providers.
    Thus, we conclude that when MassHealth seeks to recover payments
    made to providers and require them to seek reimbursement from
    Medicare, any associated costs to providers of doing so may be
    properly considered.
    That being said, this factor does not change our analysis
    in this case.   In the original administrative proceedings from
    which this case originates, testimony was heard as to the nature
    of the burden placed on providers who had been tasked with
    35
    chasing after third parties for payment.   No evidence has been
    included in the record presently before this court as to the
    administrative cost that would be placed on providers of
    pursuing Medicare, or the extent to which such costs would be
    offset by the increased compensation rate from Medicare.
    Moreover, it is unclear to what extent the costs of recovery may
    be substantially alleviated by the use of computerized
    recordkeeping and data storage, something that is much more
    widespread now than at the time of our original decision.
    In sum, given subsequent developments in the Federal law –-
    primarily, the additional administrative guidance from CMS, the
    First Circuit's ruling in Sebelius, and the amendments to 42
    C.F.R. § 424.44 -- we conclude that it was an abuse of
    discretion to find that MassHealth had failed to show a change
    in circumstances since Atlanticare I.   Medicaid is designed to
    be a payer of last resort, and it would be "illogical to suggest
    . . . that the statutory and regulatory scheme of Medicare
    abrogates" this principle.   New York Dep't of Social 
    Servs., 846 F.2d at 134
    .   Because MassHealth cannot recover reimbursements
    directly from Medicare, the best way to harmonize these
    statutory schemes is to conclude that while State Medicaid
    agencies are generally expected to seek reimbursements directly
    from liable third parties, the State agency may instead seek
    reimbursement from the provider if the liable third party is
    36
    Medicare.   Cf. 
    Leavitt, 428 F.3d at 146
    (deference to agency
    interpretation particularly warranted where it provides
    "reasonable resolution of an apparent conflict" between two
    Federal regulations).
    d.    Modification of judgment.   Separate and apart from the
    issue of changed circumstances, the motion judge also concluded
    that the agency's proposed modification of the judgment was not
    "suitably tailored" to any such change in circumstances.12    The
    judge observed that while MassHealth relied on Medicare-related
    developments to justify its request for modification, MassHealth
    nonetheless sought a wholesale reversal of Atlanticare I as it
    pertained to all liable third parties.
    We agree that MassHealth's proposed modification sweeps too
    broadly.    In its motion, MassHealth requests modification of the
    judgment "so that MassHealth may resume enforcing a regulation
    (now codified at 130 [Code Mass. Regs.] § 450.316(F)) in order
    12The motion judge's reference to "suitable tailoring"
    derives from jurisprudence concerning the Federal analog to
    Mass. R. Civ. P. 60. See Rufo v. Inmates of Suffolk County
    Jail, 
    502 U.S. 367
    , 391 (1992). The parties adopt this standard
    in their briefing as well. Under Fed. R. Civ. P. 60, once a
    moving party has satisfied its burden of demonstrating changed
    circumstances, the court must "determine whether the proposed
    modification is suitably tailored to the changed circumstance."
    Rufo, supra at 391. We have cited to Rufo in the context of
    discussing Mass. R. Civ. P. 60, but we have never explicitly
    adopted a "suitable tailoring" requirement. See MacDonald v.
    Caruso, 
    467 Mass. 382
    , 388 (2014). For the purposes of this
    decision, we assume, without deciding, that suitable tailoring
    is required under our rule as well.
    37
    to pursue reimbursement from a previously-paid provider when a
    third party entity becomes retroactively liable."    Yet
    enforcement of the regulation as written would apply to all
    post-payment third-party reimbursements, not just those sought
    from Medicare.    As 
    discussed supra
    , the changed circumstances
    that warrant a modification of the judgment pertain specifically
    to retroactive Medicare liability, not all third-party
    liability.   MassHealth has further failed to provide a rationale
    for modifying the judgment beyond its applicability to Medicare
    reimbursements.   Indeed, in its reply brief, MassHealth
    indicates that this is a nonissue for other third parties
    because MassHealth already has a direct right of recovery
    against non-Medicare insurers under G. L. c. 118E, § 22, and
    MassHealth has a general practice of seeking payment of
    liabilities due to third-party insurance coverage directly from
    the insurers themselves, rather than from providers.
    To determine the appropriate scope of modification of the
    judgment, we therefore examine the practical impact of the
    changed circumstances on the administrability of the final
    judgment.    In the wake of the First Circuit's ruling, MassHealth
    cannot recover reimbursements directly from Medicare for
    services provided to retroactive dual eligibles.    MassHealth
    currently utilizes demand billing instead –- a process by which
    MassHealth requests that the provider submit a bill to Medicare
    38
    and repay MassHealth once Medicare has paid the provider.
    MassHealth asserts that this solution does not permit MassHealth
    to pursue reimbursements where retroactive Medicare eligibility
    is discovered more than twelve months after the service was
    performed, in light of Medicare's twelve-month filing deadline.
    MassHealth notes that the Medicare filing deadline exception
    outlined in 42 C.F.R. § 424.44(b)(3), which is designed to
    address reimbursements to State Medicaid agencies, is contingent
    upon the State first voiding the Medicaid payment.13
    13Neither party addresses the Medicare filing deadline
    exception contained within 42 C.F.R. § 424.44(b)(2). This
    exception is not contingent upon the voiding of the Medicaid
    payment, unlike the exception provided by 42 C.F.R.
    § 424.44(b)(3), and triggers a six-month extension of the filing
    deadline from the date that the beneficiary or provider was
    notified of Medicare entitlement. Indeed, CMS explicitly
    declined to "create an additional exception [to the regulation]
    to permit providers and suppliers to submit claims for services
    at the request of a Medicaid State Agency prior to the State
    Medicaid Agency actually recovering the payment," because CMS
    believed the exception under 42 C.F.R. § 424.44(b)(2) was
    sufficient to account for such instances. 75 Fed. Reg. 73448-
    73449 (Nov. 29, 2010). Title 42 C.F.R. § 424.44(b)(2) does not,
    however, provide as favorable of a filing deadline extension as
    42 C.F.R. § 424.44(b)(3). This is because the six-month
    extension provided by 42 C.F.R. § 424.44(b)(2) commences as soon
    as the provider or beneficiary is notified of Medicare
    eligibility, while the six-month extension provided by 42 C.F.R.
    § 424.44(b)(3) does not commence until MassHealth recovers the
    payment.
    We also note that neither party addressed the relevance of
    a Federal regulatory provision that appears to have contemplated
    that State Medicaid agencies would pursue a waiver of the sixty-
    day deadline for seeking reimbursement where the liable third
    party is Medicare:
    39
    We conclude that changed circumstances justify the
    elimination of the restrictions imposed by Atlanticare I that
    declared that MassHealth does not have the authority to require
    that health care providers return payment to MassHealth in the
    event that Medicare is later identified as a liable third party.
    Those restrictions were imposed based on the incorrect
    assumption that MassHealth could and should pursue reimbursement
    directly from Medicare.   Given that MassHealth cannot pursue
    Medicare directly, and the permissible length of time for
    seeking reimbursements may be conditioned on whether MassHealth
    sought and received reimbursement from providers, see 42 C.F.R.
    § 433.139(d)(2), we conclude that it is appropriate to modify
    the declaratory judgment to allow MassHealth to require
    reimbursement from providers where a health care service was
    rendered to an individual who retroactively became eligible for
    Medicare.
    As mentioned previously, the original declaratory judgment
    entered in this case provided as follows:
    "An agency requesting a waiver of the requirements
    specifically concerning either the [sixty]–day limit in
    paragraph (d)(1) or (d)(2) of this section must submit
    documentation of written agreement between the agency and
    the third party, including Medicare fiscal intermediaries
    and carriers, that extension of the billing requirement is
    agreeable to all parties."
    42 C.F.R. § 433.139(e)(4).
    40
    "It is further DECLARED that [MassHealth] lacks the
    authority to implement 130 Code Mass. Regs. § 450.316(E)
    [now renumbered § 450.316(F)] to the extent that the
    regulation, by requiring hospitals to refund Medicaid
    payments to [MassHealth] after the hospitals have complied
    with [MassHealth]'s due diligence regulation (130 Code
    Mass. Regs. § 450.316) and received payment for their
    services from [MassHealth] and [MassHealth] subsequently
    learns that a third-party insurer (including Medicare) is
    responsible for payment for all or part of the hospital's
    services, is inconsistent with the Supreme Judicial Court's
    interpretation of 42 U.S.C. § 1396a(a)(25)(B)."
    The declaratory judgment is to be modified so as to excise the
    parenthetical "(including Medicare)" and to append the following
    statement to the end of the declaration:   "Notwithstanding the
    above, MassHealth retains the authority to implement 130 Code
    Mass. Regs. § 450.316(E) [now renumbered § 450.316(F)] if the
    third-party insurer is identified as Medicare.   In accordance
    with § 450.316(F), MassHealth may require a provider to
    reimburse MassHealth where a health care service was rendered to
    an individual who later became retroactively eligible for
    Medicare.   The provider must then bill Medicare before
    resubmitting a claim to MassHealth."   This modification shall be
    prospective only, applicable to reimbursements sought for
    services performed subsequent to the date of this decision.
    3.   Conclusion.   For the foregoing reasons, we conclude
    that changed circumstances require modification of the
    declaratory judgment entered pursuant to our holding in
    Atlanticare I.   Accordingly, we order that this case be remanded
    41
    to the Superior Court for modification of the judgment in
    accordance with this opinion.
    So ordered.