Davita Inc. v. Virginia Mason Memorial ( 2020 )


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  •                              FOR PUBLICATION                             FILED
    UNITED STATES COURT OF APPEALS                        NOV 24 2020
    MOLLY C. DWYER, CLERK
    U.S. COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    DAVITA INC.,                                   No.   19-35692
    Plaintiff-Appellant,            D.C. No. 2:19-cv-00302-BJR
    v.
    OPINION
    VIRGINIA MASON MEMORIAL
    HOSPITAL, FKA Yakima Valley Memorial
    Hospital; YAKIMA VALLEY MEMORIAL
    HOSPITAL EMPLOYEE HEALTH CARE
    PLAN,
    Defendants-Appellees.
    Appeal from the United States District Court
    for the Western District of Washington
    Barbara Jacobs Rothstein, District Judge, Presiding
    Argued and Submitted October 8, 2020
    Seattle, Washington
    Before: Susan P. Graber and William A. Fletcher, Circuit Judges, and Leslie E.
    Kobayashi,* District Judge.
    Opinion by Judge Graber
    GRABER, Circuit Judge:
    *
    The Honorable Leslie E. Kobayashi, United States District Judge for
    the District of Hawaii, sitting by designation.
    Defendant Virginia Mason Memorial Hospital administers its own group
    health plan, Defendant Yakima Valley Memorial Hospital’s Employee Health Care
    Plan ("Virginia Mason's Plan" or "the Plan"). Among its many provisions, the Plan
    authorizes payments to providers of dialysis, a critical treatment for persons with
    end-stage renal disease ("ESRD"). Persons with ESRD become eligible for
    Medicare after three months of dialysis treatment, even if not otherwise eligible for
    Medicare. When, as here, both Medicare and another insurer have independent
    obligations to pay for a service such as dialysis, Congress—in the Medicare as
    Secondary Payer provisions ("MSP"), 42 U.S.C. § 1395y(b)—has decreed who
    pays first and who pays second. The MSP also imposes substantive requirements
    on group health plans, including by forbidding plans from taking into account an
    ESRD patient’s eligibility for Medicare during the first thirty months of Medicare
    eligibility.
    Id. § 1395y(b)(1)(C). Plaintiff
    DaVita, Inc., brought this action pursuant to the MSP’s private
    cause of action
    , id. § 1395y(b)(3)(A), which
    authorizes suit when a plan fails to
    make a statutorily compliant primary payment. DaVita provides dialysis treatment
    to patients, including a beneficiary of Virginia Mason’s Plan known as "Patient 1."
    DaVita alleges that Defendants reduced the payment amount for Patient 1’s
    dialysis because of Medicare eligibility as soon as Patient 1 became eligible for
    Medicare, without waiting the mandatory thirty months. But the reduced payment
    2
    amount remained greater than the Medicare rate, so Medicare never made any
    secondary payments. The district court dismissed the complaint, holding that the
    MSP’s private cause of action is available only when Medicare has made a
    payment.
    Reviewing de novo and taking the allegations in the complaint as true,
    Daewoo Elecs. Am., Inc. v. Opta Corp., 
    875 F.3d 1241
    , 1246 (9th Cir. 2017), we
    hold that dismissal of the complaint on that ground was erroneous. The statutory
    text, congressional purpose, and regulatory clues make clear that Congress did not
    intend payment by Medicare to be a prerequisite to bringing a private cause of
    action under the MSP. The private cause of action encompasses situations in
    which a primary plan impermissibly takes Medicare eligibility into account too
    soon, even if Medicare has not made any payments. Accordingly, we vacate in
    large part and remand for further proceedings.
    BACKGROUND
    A.     ESRD and Medicare
    More than 700,000 people in the United States have ESRD, also known as
    kidney failure. To survive, a person with ESRD requires either a kidney transplant
    or routine maintenance dialysis. 42 C.F.R. § 406.13(b); see also Kidney Disease
    Statistics for the United States, Nat’l Insts. of Health (December 2016),
    https://www.niddk.nih.gov/health-information/health-statistics/kidney-disease.
    3
    Dialysis acts as a substitute for a functioning kidney. The most common form of
    dialysis for persons with ESRD is hemodialysis.
    Id. As described by
    DaVita,
    during hemodialysis, "[a] dialysis machine removes blood from the body, filters it
    through an artificial kidney, and then returns the cleaned blood." "Traditional, in-
    center dialysis is administered to a patient three times a week for about four hours
    each session." Most persons with ESRD never receive a kidney transplant, so they
    receive regular dialysis for the remainder of their lives. Dialysis is expensive,
    costing tens of billions of dollars annually in the United States.
    Congress responded to the critical need for dialysis and the high cost of
    treatment. When Congress created Medicare in 1965, the program encompassed
    only two categories of eligibility: age and disability. 42 U.S.C. § 426 (1965). But
    many persons with ESRD did not qualify for Medicare and could not afford
    dialysis on their own. In 1972, Congress expanded Medicare by making all
    persons diagnosed with ESRD eligible for Medicare, regardless of age or
    disability. 42 U.S.C. § 426-1. A person diagnosed with ESRD becomes eligible
    for Medicare three months after first beginning regular maintenance dialysis (or
    sometimes sooner if the person receives a kidney transplant).
    Id. § 426-1(b). Medicare
    is not, of course, the sole provider of healthcare benefits. Many
    other sources—such as worker’s compensation programs, tort-liability insurers,
    and group health plans—also provide healthcare benefits. When a patient is
    4
    covered by more than one program, which program must pay first can be a
    significant question.
    Congress has allocated primary-payer responsibility between Medicare and
    other insurers through the MSP. For the 30 months following an individual’s
    Medicare eligibility due to ESRD, a group health plan may not "take into account"
    the person’s eligibility for Medicare.
    Id. § 1395y(b)(1)(C)(i). Following
    that 30-
    month period (33 months after treatment began), a group health plan may begin
    "paying benefits secondary to" Medicare.
    Id. § 1395y(b)(1)(C). In
    sum, for a
    person with ESRD who is covered by a group health plan, the plan is the sole payer
    during the first 3 months of dialysis; the plan is the primary payer and Medicare is
    the secondary payer during the 30-month coordination period; and the plan may be
    the secondary payer thereafter.
    B.     Factual and Procedural History
    Virginia Mason operates a nonprofit hospital in Yakima, Washington. Many
    hospital employees are eligible to enroll in Virginia Mason’s Plan, which is an
    "employee benefit plan" within the meaning of the Employee Retirement Income
    Security Act of 1974 ("ERISA").
    Virginia Mason’s Plan provides varying rates of reimbursement for benefits
    depending on whether the beneficiary visits an "in-network" provider or an "out-
    of-network" provider. The Plan has a separate provision pertaining to
    5
    reimbursement for dialysis. In many circumstances, the Plan pays for dialysis
    services the same way it pays for all other covered services: "at applicable
    network or negotiated fee at in-network and out-of-network benefit levels." But
    "[o]nce the member becomes, or is eligible to become, qualified for Medicare
    coverage for ESRD and Medicare becomes or is eligible to become the secondary
    payer for ESRD services, the Plan will pay claims for ESRD services at 125% of
    the then current Medicare allowable [rate] for ESRD Services." DaVita alleges
    that, although the special reimbursement rate is higher than Medicare’s
    reimbursement rate, the special reimbursement rate is significantly lower than the
    ordinary rates paid to both in-network and out-of-network providers.
    Patient 1, a beneficiary of Virginia Mason’s Plan who has ESRD, received
    regular dialysis treatment from DaVita. For the first three months of treatment,
    when Patient 1 had not yet become eligible for Medicare, DaVita received
    "appropriate reimbursement" from the Plan’s third-party claims administrator. But
    beginning in the fourth month of treatment, when Patient 1 first became eligible for
    Medicare due to ESRD and when Medicare became the secondary payer, the Plan
    reimbursed DaVita at the special reimbursement rate described above. The Plan
    paid that lower rate for 20 months. DaVita alleges that Patient 1 then "switched
    from the Plan to Medicare for primary coverage for dialysis treatments," and the
    Plan apparently ceased all payments to DaVita.
    6
    DaVita brought this action, asserting a single claim pursuant to 42 U.S.C.
    § 1395y(b)(3)(A). DaVita alleges in part that, by immediately taking into account
    Patient 1’s eligibility for Medicare, the Plan’s ESRD-specific program violates the
    MSP’s prohibition on taking into account an individual’s eligibility for Medicare
    , id. § 1395y(b)(1)(C)(i). As
    noted, the district court ruled that the MSP’s private cause of action
    applies only when Medicare has made a payment. Because DaVita did not allege
    that Medicare had made a payment, the court dismissed the complaint for failure to
    state a claim. DaVita timely appeals.
    DISCUSSION
    The parties dispute the scope of the MSP’s private cause of action, 42 U.S.C.
    § 1395y(b)(3)(A). We find it useful to begin, as have other courts, with an
    overview of the MSP, in Part A, below. In Part B, we analyze the scope of the
    private cause of action, concluding that Congress did not intend payment by
    Medicare to be a prerequisite to suit. Finally, in Part C, we apply that holding to
    the allegations in this case.
    A.     Overview of the MSP
    The MSP provisions all are found in 42 U.S.C. § 1395y(b). Originally
    enacted in 1965, the provisions have expanded considerably in the intervening
    decades. We explore three aspects of the MSP’s evolution: (1) its "secondary
    7
    payer" designation; (2) substantive requirements on group health plans and (3)
    enforcement mechanisms.
    1.     Secondary-Payer Designation
    The Medicare as Secondary Payer provisions, as the name suggests,
    designate Medicare as the secondary payer in certain circumstances when both
    Medicare and a non-Medicare entity have independent duties to pay for a covered
    person’s healthcare costs. The MSP itself does not impose a duty to pay on
    Medicare or on any other entity. Instead, the MSP "presupposes an existing
    obligation (whether by statute or contract) to pay for covered items or services."
    Humana Med. Plan v. W. Heritage Ins. Co., 
    832 F.3d 1229
    , 1237 (11th Cir. 2016).
    Medicare’s duty arises from statutory provisions that govern Medicare. And a
    non-Medicare entity’s duty arises from a separate legal source, such as a tort-
    insurance policy or a group health plan.
    How the MSP designates Medicare as the secondary payer is less direct than
    one might expect; the statute does not contain a straightforward provision that the
    non-Medicare entity must pay first and that Medicare must pay second. Instead,
    the MSP always has accomplished the same goal through two main clauses. First,
    the MSP forbids payment by Medicare when another insurer has paid or is
    expected to pay. 42 U.S.C. § 1395y(b)(2)(A); accord, e.g.
    , id. § 1395y(b)(1) (1984);
    id. § 1395y(b) (1965). 
    Second, the MSP requires all payments by
    8
    Medicare to be conditioned on reimbursement whenever Medicare discovers that
    another insurer has paid or should have paid. 42 U.S.C. § 1395y(b)(2)(B); accord,
    e.g.
    , id. § 1395y(b)(1) (1984);
    id. § 1395y(b) (1965). 
    Effectively, then, Medicare
    is the secondary payer and the other insurer is the primary payer.
    Paragraph (2) of the present-day statutory text is titled "Medicare secondary
    payer." 42 U.S.C. § 1395y(b)(2). Subparagraph (2)(A), titled "In general,"
    contains the necessary ingredients to accomplish the secondary-payer designation.
    Except as provided in subparagraph (2)(B), subparagraph (2)(A) forbids payment
    by Medicare when another insurer has paid or is expected to pay.
    Id. § 1395y(b)(2)(A).1 Subparagraph
    (2)(B) authorizes payments by Medicare in
    1
    Subparagraph (2)(A) states, in full:
    (A) In general
    Payment under this subchapter may not be made, except as
    provided in subparagraph (B), with respect to any item or service
    to the extent that—
    (i) payment has been made, or can reasonably be expected to be
    made, with respect to the item or service as required under
    paragraph (1), or
    (ii) payment has been made or can reasonably be expected to be
    made under a workmen’s compensation law or plan of the United
    States or a State or under an automobile or liability insurance
    policy or plan (including a self-insured plan) or under no fault
    insurance.
    (continued)
    9
    certain circumstances, but all payments must be conditioned on reimbursement in
    the event that the Secretary of Health and Human Services discovers that another
    insurer should have paid. See
    id. § 1395y(b)(2)(B)(i) ("Authority
    to make
    conditional payment");
    id. § 1395y(b)(2)(B)(ii) ("Repayment
    required").
    Accordingly, as we previously have held, subparagraph (2)(A) designates
    Medicare the secondary payer and the other insurer the primary payer. See Parra
    v. PacifiCare of Ariz., Inc., 
    715 F.3d 1146
    , 1152 (9th Cir. 2013) (citing
    subparagraph (2)(A) specifically for the conclusion that "[t]he MSP makes
    Medicare insurance secondary to any ‘primary plan’ obligated to pay a Medicare
    recipient’s medical expenses."); see also 
    Humana, 832 F.3d at 1237
    ("Paragraph
    (2)(A) alters the priority among already-obligated entities . . . .");
    id. (referring to "the
    secondary-payer scheme created by paragraph (2)(A)"); Health Ins. Ass'n of
    Am., Inc. v. Shalala, 
    23 F.3d 412
    , 414 (D.C. Cir. 1994) ("Paragraph (2) . . . makes
    In this subsection, the term “primary plan” means a group health
    plan or large group health plan, to the extent that clause (i)
    applies, and a workmen’s compensation law or plan, an
    automobile or liability insurance policy or plan (including a self-
    insured plan) or no fault insurance, to the extent that clause (ii)
    applies. An entity that engages in a business, trade, or profession
    shall be deemed to have a self-insured plan if it carries its own
    risk (whether by a failure to obtain insurance, or otherwise) in
    whole or in part.
    Id. § 1395y(b)(2)(A). 10
    Medicare the ‘secondary’ payer . . . ."); accord Mason v. Am. Tobacco Co., 
    346 F.3d 36
    , 38 (2d Cir. 2003).
    As originally enacted in 1965, the MSP designated Medicare as the
    secondary payer solely with respect to state and federal worker’s compensation
    laws and plans. 42 U.S.C. § 1395y(b) (1965). All other insurers, mainly tort-
    liability insurers and group health plans, remained off the hook. If Medicare and a
    private policy both covered a healthcare expense, the private insurer simply could
    decline to pay the expense until Medicare had paid first. The private insurers
    would pick up the tab for any remaining costs (provided, of course, that those
    additional costs were covered by the private insurance). Bio-Medical Applications
    of Tenn., Inc. v. Central States Se. & Sw. Areas Health & Welfare Fund, 
    656 F.3d 277
    , 278 (6th Cir. 2011).
    In 1980, Congress responded to that costly arrangement. Congress
    expanded the reach of the MSP by designating Medicare as the secondary payer
    with respect to tort-liability insurance of all stripes: "an automobile or liability
    insurance policy or plan (including a self-insured plan)" and "no fault insurance."
    Pub. L. No. 96-499, 94 Stat. 2599 (Dec. 5, 1980); 42 U.S.C. § 1395y(b) (Dec.
    1980). In 1981, Congress next designated Medicare as the secondary payer with
    respect to group health plans, but only for persons eligible to enroll in Medicare
    solely because of ESRD. Pub. L. No. 97-35, 95 Stat. 357 (Aug. 13, 1981); 42
    11
    U.S.C. § 1395y(b)(2) (Aug. 1981). The next year, Congress extended Medicare's
    secondary-payer status with respect to group health plans to encompass some
    persons enrolled in Medicare due to age. Pub. L. No. 97-248, 96 Stat. 324 (Sept. 3,
    1982); 42 U.S.C. § 1395y(b)(3) (Sept. 1982). And in 1986, Congress added the
    third category of Medicare eligibility: disability. Pub. L. No. 99-509, 100 Stat.
    1874 (October 21, 1986); 42 U.S.C. § 1395y(b)(4) (Oct. 1986). Thus, by 1986, the
    MSP—in its peculiar way—designated Medicare as the secondary payer with
    respect to nearly all insurers and nearly all categories of Medicare eligibility.
    2.     Substantive Requirements for Group Health Plans
    With respect to group health plans specifically, Congress went beyond
    merely giving Medicare secondary-payer status. Originally, the MSP did not
    impose any substantive requirements on group health plans. So far as the MSP
    was concerned, insurers were free to craft plan provisions that accounted for
    Medicare eligibility or that offered differing treatment to, for example, seniors or
    those diagnosed with ESRD. In the late 1980s, Congress enlarged the scope of the
    MSP by enacting substantive requirements, generally prohibiting group health
    plans from "tak[ing] into account" a person’s Medicare enrollment or eligibility
    and from offering differing benefits to working seniors or ESRD patients. Pub. L.
    No. 101-239, 103 Stat. 2106 (Dec. 19, 1989); Pub. L. No. 99-509, 100 Stat. 1874
    (October 21, 1986).
    12
    Those substantive "[r]equirements of group health plans" are now all found
    in paragraph (1).
    Id. § 1395y(b)(1). The
    first three subparagraphs impose
    substantive requirements with respect to the three categories of Medicare
    eligibility.2 Subparagraph (1)(A) prohibits most group health plans from taking
    into account a beneficiary’s entitlement to Medicare because of age, and it
    affirmatively requires plans to provide identical benefits to working seniors as to
    others.
    Id. § 1395y(b)(1)(A). Subparagraph
    (1)(B) generally prohibits large group
    health plans from taking into account a beneficiary’s entitlement to Medicare
    because of disability.
    Id. § 1395y(b)(1)(B). Subparagraph
    (1)(C), which is most
    relevant here, contains two substantive prohibitions with respect to persons who
    have ESRD:
    A group health plan (as defined in subparagraph (A)(v))—
    (i) may not take into account that an individual is entitled to or eligible
    for benefits under this subchapter under section 426-1 of this title
    during the [30]-month period which begins with the first month in
    which the individual becomes entitled to benefits under part A under
    the provisions of section 426-1 of this title, or, if earlier, the first month
    in which the individual would have been entitled to benefits under such
    part under the provisions of section 426-1 of this title if the individual
    had filed an application for such benefits; and
    2
    The substantive requirements are subject both to blanket exceptions, such
    as for religious orders, 42 U.S.C. § 1395y(b)(1)(D), and to subparagraph-specific
    exceptions, such as for small employers with respect to age-based eligibility
    , id. § 1395y(b)(1)(A)(ii). But
    most of the requirements apply broadly to many group
    health plans. Defendants have not claimed that any exception applies here.
    13
    (ii) may not differentiate in the benefits it provides between individuals
    having end stage renal disease and other individuals covered by such
    plan on the basis of the existence of end stage renal disease, the need
    for renal dialysis, or in any other manner[.]
    Id. § 1395y(b)(1)(C). 3.
        Enforcement Mechanisms
    Similarly, Congress has strengthened the MSP's enforcement mechanisms
    over time. Congress originally incentivized compliance solely through mild tax
    consequences. 42 U.S.C. § 162(h) (1981). Beginning in 1984, though, it added a
    governmental cause of action, allowing the United States to bring suit to recover its
    payments when another insurer should have paid. Pub. L. No. 98-369, 98 Stat. 494
    (July 18, 1984). Finally, in 1986, Congress added a private cause of action,
    allowing a suit for double damages whenever an insurer failed to pay in accordance
    with the MSP’s provisions. Pub. L. No. 99-509, 100 Stat. 1874 (October 21,
    1986); 42 U.S.C. § 1395y(b)(5) (1986). In that same enactment, Congress
    authorized the government, too, to recover double damages in some circumstances.
    Pub. L. No. 99-509, 100 Stat. 1874 (October 21, 1986); 42 U.S.C.
    § 1395y(b)(4)(A)(iii) (Oct. 1986); see also Pub. L. No. 101-239, 103 Stat. 2106
    (Dec. 19, 1989) (expanding the scope of the double-damages provision for the
    governmental cause of action); 42 U.S.C. § 1395y(b)(2)(B)(ii) (Dec. 1989).
    B.     Analysis
    14
    We next consider whether payment by Medicare is a prerequisite to suit
    pursuant to the private cause of action, 42 U.S.C. § 1395y(b)(3)(A). We examine
    (1) the statutory text, (2) congressional purpose, and (3) regulatory clues.
    1.    Statutory Text
    "We begin, as usual, with the statutory text." Maslenjak v. United States,
    
    137 S. Ct. 1918
    , 1924 (2017). The "Private Cause of Action" provision states, in
    full:
    There is established a private cause of action for damages (which shall
    be in an amount double the amount otherwise provided) in the case of
    a primary plan which fails to provide for primary payment (or
    appropriate reimbursement) in accordance with paragraphs (1) and
    (2)(A).
    42 U.S.C. § 1395y(b)(3)(A).
    The cause of action is thus available whenever a primary plan fails to take a
    specific action: paying in accordance with two provisions. Nothing in the
    statutory text concerns an act or omission by Medicare. Indeed, the text does not
    mention Medicare at all; it merely authorizes suit whenever a primary plan fails to
    make an appropriate payment. Nor would it have been hard for Congress to
    include payment by Medicare as an element. For example, Congress could have
    added "when the Secretary has made a conditional payment" or "to recover
    payment made under this subchapter." Congress did exactly that in defining the
    scope of the government’s cause of action, which begins: "In order to recover
    15
    payment made under this subchapter for an item or service, the United States may
    bring an action . . . ." 42 U.S.C. §1395y(b)(2)(B)(iii) (emphasis added); see
    Russello v. United States, 
    464 U.S. 16
    , 23 (1983) ("Where Congress includes
    particular language in one section of a statute but omits it in another section of the
    same Act, it is generally presumed that Congress acts intentionally and purposely
    in the disparate inclusion or exclusion." (internal quotation marks and brackets
    omitted)). We therefore deem Congress’ omission in § 1395y(b)(3)(A) of a
    requirement for Medicare to have paid to be deliberate.
    Defendants nevertheless insist that Congress intended to require payment by
    Medicare as a prerequisite to suit. Defendants urge us to infer that prerequisite
    from the statutory text authorizing suit whenever a primary plan fails to pay "in
    accordance with paragraphs (1) and (2)(A)." 42 U.S.C. § 1395y(b)(3)(A).
    According to Defendants, the only way to make sense of the text is to conclude
    that Congress intended payment by Medicare as a prerequisite to suit. We
    disagree.
    "Determining when a primary plan violates paragraph (1) is easy." Bio-
    
    Medical, 656 F.3d at 285
    . As we described above, paragraph (1) contains
    substantive prohibitions that apply to group health plans. So, in order to pay in
    accordance with paragraph (1), a group health plan must not violate those
    prohibitions. For example, pertinent here, subparagraph (1)(C) bars a group health
    16
    plan from taking into account Medicare eligibility due to ESRD. A payment by a
    group health plan that took into account a person’s eligibility for Medicare due to
    ESRD would not be in accordance with paragraph (1). Nothing about
    § 1395y(b)(3)(A)’s reference to paragraph (1) suggests that Medicare must pay.
    Defendants direct us instead to the provision’s reference to a plan’s failure to
    pay in accord with subparagraph (2)(A). That provision forbids Medicare from
    making payments when another plan has paid or is expected to pay; at first glance,
    it does not affirmatively direct primary plans to do anything. The Sixth Circuit
    aptly summarized:
    How can a primary plan fail to make a payment in accordance with
    subparagraph (2)(A), if that subparagraph only instructs when
    Medicare, and not primary plans, may or may not make payments?
    
    Bio-Medical, 656 F.3d at 286
    (emphasis omitted).
    The answer, in our view, is not complicated. As we discussed above, and as
    we held in 
    Parra, 715 F.3d at 1152
    , subparagraph (2)(A) assigns secondary-payer
    status to Medicare and therefore necessarily assigns primary-payer status to the
    private insurer. Indeed, the original version of the cause-of-action provision made
    that implication explicit, referring to the various insurance types, including group
    health plans, as having been "made a primary payer" by the predecessor clauses to
    current subparagraph (2)(A). 42 U.S.C. § 1395y(b)(5) (Oct. 1986). In other
    words, the functional effect of subparagraph (2)(A) on a private insurer is to
    17
    require the private insurer to be the primary payer. Therefore, a payment in
    accordance with subparagraph (2)(A) merely requires payment consistent with the
    insurer’s primary-payer status.
    Applying that insight here, any mystery about the scope of the private right
    of action falls away. Paragraph (1) imposes substantive requirements on group
    health plans, thereby requiring benefit calculations consistent with those
    requirements. Subparagraph (2)(A) designates the private insurer, in prescribed
    circumstances, as the primary payer, thereby requiring payment before Medicare
    has paid (or requiring reimbursement if Medicare has paid already). A plan’s
    payment must comport with both the substantive requirements of paragraph (1) and
    the primary-payer requirement of subparagraph (2)(A).
    Notably, a plan’s failure to abide by those requirements does not always
    cause Medicare to make a conditional payment. If a plan refuses to cover persons
    with ESRD, for example, in violation of paragraph (1), then Medicare might make
    a payment. But if, as alleged here, a plan violates paragraph (1) yet pays more than
    the Medicare rate, then Medicare will not make any additional payments.
    Similarly, if a plan fails to pay consistent with its assigned primary-payer
    status—for example, by declining to pay until after Medicare has paid or by paying
    an amount that subtracts an amount equal to an expected Medicare payment—then
    that failure will not necessarily cause Medicare to make a payment. Indeed,
    18
    regulations generally forbid Medicare from making payments when a group health
    plan has a duty to pay. 42 C.F.R. § 411.165(b); cf. 42 U.S.C. § 1395y(b)(2)(B)(i)
    (authorizing conditional payments when a tort-liability insurer is not reasonably
    expected to pay).
    In other words, a group health plan’s failure to pay consistent with its
    substantive obligations or its failure to pay consistent with its primary-payer status
    sometimes results in payment by Medicare and sometimes does not result in
    payment by Medicare. But the private cause-of-action provision looks solely to the
    group health plan’s actions, not to the downstream effect of those actions.
    Whether a "primary plan . . . fails to provide for primary payment (or appropriate
    reimbursement) in accordance with" two requirements does not ask whether
    Medicare has made a payment. 42 U.S.C. § 1395y(b)(3)(A). In our view, then, the
    statutory text does not support Defendants’ argument that Medicare must make a
    payment.
    We acknowledge that the only other circuit court to have examined the
    pertinent text in detail has reached the opposite conclusion. In a thoughtful
    analysis, the Sixth Circuit adopted a different reading of the relevant provision’s
    reference to subparagraph (2)(A). DaVita, Inc. v. Marietta Mem'l Hosp. Empl.
    Health Benefit Plan, 
    978 F.3d 326
    , 337–40 (6th Cir. 2020); 
    Bio-Medical, 656 F.3d at 284
    –87. Overlooking the functional effect of subparagraph (2)(A), the court
    19
    reasoned, instead, that Congress must have intended the reference to subparagraph
    (2)(A) to require payment by Medicare. 
    Marietta, 978 F.3d at 337
    –38; Bio-
    
    Medical, 656 F.3d at 286
    . According to the Sixth Circuit, "the only way that a
    primary plan can fail to act in accordance with [subparagraph (2)(A)] is by failing
    to make payments or appropriate reimbursements to a provider and thus triggering
    the remission of a conditional payment by Medicare." 
    Marietta, 978 F.3d at 337
    (emphasis added).
    We respectfully disagree. As discussed above, a plan’s failure to pay
    consistent with its obligations only sometimes triggers payment by Medicare.
    Moreover, the statutory provisions concerning conditional payments by Medicare
    are found in subparagraph (2)(B), not subparagraph (2)(A). Subparagraph (2)(B) is
    titled "Conditional payment"; subparagraph (2)(B)(i) authorizes conditional
    payments by Medicare; and subparagraph (2)(B)(ii) requires a primary plan to
    make an appropriate reimbursement. If Congress had referenced those statutory
    provisions directly in the cause-of-action provision, we might infer a prerequisite
    of payment by Medicare. But Congress did not refer to those provisions directly;
    instead, it required only that primary plans pay in accordance with paragraphs (1)
    and (2)(A). It is true that subparagraph (2)(A) states that Medicare may not make
    payments except as provided in subparagraph (2)(B). But if the cause-of-action
    provision’s aim were to require a payment by Medicare in order to sue, then why
    20
    refer to subparagraph (2)(A) at all? The only function that subparagraph (2)(A)
    serves with respect to Medicare is to prohibit Medicare payments. We therefore
    part ways with the Sixth Circuit’s analysis and conclude, instead, that a private
    insurer fails to pay in accord with subparagraph (2)(A) whenever it pays
    inconsistently with its primary-payer status. No payment by Medicare is required.
    Returning to the text of the cause-of-action provision, we emphasize a subtle
    but important point. The statute authorizes suit whenever a plan "fails to provide
    for primary payment (or appropriate reimbursement) in accordance with
    paragraphs (1) and (2)(A)." 42 U.S.C. § 1395y(b)(3)(A). The plan must pay in
    accord with both requirements (it must pay the same for Medicare enrollees and it
    must pay first).3 The two requirements form an obligation on a group health plan
    to make a statutorily compliant payment. If the payment does not comply, then the
    plan has failed to pay in accordance with that obligation. In other words, as
    3
    The prepositional phrase "in accordance with paragraphs (1) and (2)(A)"
    clearly connects to "provide for primary payment," not "fails." Congress placed
    the prepositional phrase immediately after the phrase "provide for primary
    payment (or appropriate reimbursement)," strongly suggesting that the "in
    accordance with" phrase modifies the payment requirement, not the failure. See,
    e.g., Barnhart v. Thomas, 
    540 U.S. 20
    , 26–27 (2003) (describing and applying the
    rule of the last antecedent). Moreover, the meaning of the prepositional phrase
    resolves any doubt. One cannot "fail" "in accordance with" something; "in
    accordance with" means "in agreement or harmony with" or "in conformity to."
    See accordance, Oxford English Dictionary (3d ed. 2011),
    https://www.oed.com/view/Entry/1170?redirectedFrom=accordance#eid (last
    visited Nov. 13, 2020) (def. 2b ("in accordance with"))
    21
    explained in more detail below, a failure to pay in accord with two requirements
    occurs whenever a payment violates either of the provisions. The private right of
    action thus attaches if a plan either fails to pay in accord with paragraph (1) or fails
    to pay in accord with subparagraph (2)(A). A plan’s payment need not fail on both
    scores; a noncompliant payment, for either reason, triggers the right to sue.
    Formal logic supports that interpretation. Known as one of De Morgan’s
    laws, the principle holds that the condition of "not (A and B)" is satisfied if either
    "not A" or "not B." Irving M. Copi & Carl Cohen, Introduction to Logic 331–32
    (14th ed. 2011); Peter Smith, An Introduction to Formal Logic 61, 100 (2003); see
    also R.L. Goodstein, Boolean Algebra 6–7 (Dover ed. 2007). Courts have applied
    De Morgan’s laws in interpreting statutes. E.g., Schane v. Int’l Broth. of
    Teamsters Union Local No. 710 Pension Fund Pension Plan, 
    760 F.3d 585
    , 589–90
    (7th Cir. 2014); United States v. One 1973 Rolls Royce, 
    43 F.3d 794
    , 814–15 (3d
    Cir. 1994). Of course, statutory interpretation is not a rigid mathematical exercise;
    when considering De Morgan’s laws, "[c]ontext matters." 
    Schane, 760 F.3d at 590
    ; see generally Lawrence M. Solan, The Language of Judges 45–63 (1993)
    (discussing the principles at some length). But the context here decisively
    confirms our interpretation.
    The principle is best illustrated by example where, as here, the two clauses
    establish separate requirements that govern an action. If a hypothetical statute
    22
    required payment (1) by the end of the month and (2) by cashier’s check, and the
    statute provided that payment will be rejected if the debtor fails to pay in
    accordance with paragraphs (1) and (2), no one would contend that a timely
    personal check or an untimely cashier’s check must be accepted. Or consider a
    hiring statute that (1) bars sex discrimination and (2) bars religious discrimination.
    A failure to hire in accord with paragraphs (1) and (2) occurs whenever the
    employer engaged in one of those forms of discrimination. No one would contend
    that a failure occurs only if the employer engaged in both sex discrimination and
    religious discrimination. This understanding also comports with ordinary speech.
    If a teacher sternly tells a student to "sit down and be quiet," and threatens
    detention if the student fails to sit down and be quiet, the whole class knows that
    the student must comply with both instructions to avoid detention. Sitting while
    making noise won't cut it.
    The MSP’s private cause-of-action provision operates in the same way.
    Paragraph (1) imposes substantive requirements on group health plans, and
    subparagraph (2)(A) requires the private insurer to pay first. A plan fails to pay in
    accordance with those provisions either by violating the substantive provisions in
    paragraph (1) or by failing to pay consistently with its primary-payer status.
    Careful study of the private cause-of-action provision also confirms that
    interpretation. This case involves a suit against a group health plan. But the cause-
    23
    of-action provision also encompasses a tort-liability insurer’s failure to pay. The
    provisions of paragraph (1) apply solely to group health plans, so it is impossible
    for a tort-liability insurer to "fail" to pay in accordance with paragraph (1). Courts
    nevertheless have allowed an action to lie for any failure by a tort-liability insurer
    to pay in accordance with subparagraph (2)(A) only. E.g., Mich. Spine & Brain
    Surgeons, PLLC v. State Farm Mut. Auto. Ins. Co., 
    758 F.3d 787
    , 790–93 (6th Cir.
    2014); see 
    Humana, 832 F.3d at 1236
    –37 (noting that "[p]aragraph (1) regulates
    group health plans and is not at issue in this case" and nevertheless holding that "a
    primary plan ‘fails to provide for primary payment (or appropriate reimbursement)
    in accordance with paragraph[] . . . (2)(A)’" (ellipsis and second alteration by
    Humana)); Glover v. Liggett Grp., Inc., 
    459 F.3d 1304
    , 1308 (11th Cir. 2006) (per
    curiam) (analyzing the cause of action in a tort-based suit by reference solely to
    subparagraph (2)(A), and holding that the statute "creates a private cause of action
    for double damages ‘in the case of a primary plan which fails to provide for
    primary payment (or appropriate reimbursement) in accordance with . . . (2)(A).’"
    (ellipsis by Glover) (emphasis omitted) (quoting 42 U.S.C. § 1395y(b)(3)(A))); see
    also In re Avandia, 
    685 F.3d 353
    , 359 (3d Cir. 2012) (analyzing a private cause of
    action brought against a self-insured company without regard to paragraph (1)’s
    requirements and holding that the action may be brought notwithstanding the lack
    of a violation of paragraph (1)). In other words, for one of the two categories of
    24
    insurers (tort-liability insurers), a failure to pay in accordance with just one of the
    subparagraphs suffices. In our view, Congress clearly intended the same result
    with respect to the other category of insurers (group health plans).
    Finally, we note that the Sixth Circuit began its analysis with the opposite
    assumption: that the cause of action requires two separate failures, a failure to pay
    in accord with paragraph (1) and a failure to pay in accord with subparagraph
    (2)(A). 
    Marietta, 978 F.3d at 337
    ; Bio-
    Medical, 656 F.3d at 285
    . Because of that
    assumption, the Sixth Circuit was unable to make sense of the statute; the court
    thus abandoned the approach, determining instead to "consider paragraphs (1) and
    (2)(A) collectively, rather than individually." 
    Marietta, 978 F.3d at 337
    (quoting
    
    Bio-Medical, 656 F.3d at 286
    ). For the reasons that we have explained above, we
    think that Congress intended to permit a private action if an insurer fails to abide
    by either obligation.
    In sum, paragraph (1) provides the substantive obligations of a group health
    plan, and subparagraph (2)(A) designates a plan as the primary payer in certain
    circumstances. Those two provisions, together, create an obligation on a plan to
    make a primary payment in some circumstances, and the statute allows suit
    whenever a plan fails to meet its obligation in either respect.
    Our interpretation yields a tidy result. For group health plans, paragraph (1)
    requires payment according to certain substantive terms, such as not taking into
    25
    account Medicare eligibility when calculating the payment amount; and
    subparagraph (2)(A) merely requires primary payment, that is, payment before
    Medicare pays or reimbursement if Medicare already paid. In cases like this one,
    where the plan made a primary payment, the plan arguably did not fail to pay in
    accordance with subparagraph (2)(A). But the plan’s alleged violation of
    paragraph (1) nevertheless gives rise to a claim.
    Similarly, one can imagine the reverse situation, in which the group health
    plan’s terms and calculations are proper, but the plan declines to pay on the
    improper basis that Medicare must pay first (or the plan waits for Medicare to pay
    first and then pays the balance only). In that situation, the plan arguably did not
    fail to pay in accordance with paragraph (1), because the plan’s terms and
    calculations are proper; but the plan clearly failed to pay in accordance with
    subparagraph (2)(A), because it made no payment (or a secondary payment only).
    The plan’s violation of subparagraph (2)(A) would give rise to a cause of action.
    Similarly, as noted above, a tort-liability insurer cannot fail to pay in accord with
    paragraph (1), because it does not apply; but a tort-liability insurer’s refusal to
    assume primary-payer status, contrary to subparagraph (2)(A), would give rise to a
    cause of action. It may seem implausible today that a plan would blatantly
    contradict the MSP by asserting that Medicare must pay first. But we note that, for
    26
    decades, the sole purpose of the MSP was to require private plans to pay first—a
    requirement that insurers resisted and that Congress struggled to enforce.
    Our reading of the cause-of-action provision does not require payment by
    Medicare as a prerequisite to suit. In that sense, the reading is broader than a rule
    that requires payment by Medicare. But our interpretation is, in at least one way,
    more limited than the reading adopted by some courts. E.g., MSP Recovery, LLC
    v. Allstate Ins. Co., 
    835 F.3d 1351
    , 1358 (11th Cir. 2016). Specifically, our
    reading does not convert ordinary billing disputes into MSP claims giving rise to
    double damages. If a plan denies payment for any reason other than those reasons
    forbidden by paragraphs (1) and (2)(A), then no MSP claim is available. For
    example, no MSP claim would be available if the insurer declines to pay because
    of a good-faith assertion4 that the beneficiary has reached the plan’s maximum
    payments, that the claim is fraudulent, that the beneficiary failed to obtain pre-
    approval for a service, that the beneficiary’s coverage had expired, and so on.
    Those disputes would require resolution through ordinary ERISA channels or
    state-law contract claims. An MSP claim, and its allowance of double damages,
    4
    A bad-faith assertion might require a different result. If a plan raised a
    bad-faith defense to mask its violation of the MSP provisions, an MSP action
    might be valid. Of course, the plaintiff would have the burden to show that the real
    reason for the denial was one of the MSP-forbidden grounds. Cf. Manning v.
    Utils. Mut. Ins. Co., 
    254 F.3d 387
    , 389–90 (2d Cir. 2001) (reversing the district
    court’s dismissal of a claim that the insurer had denied benefits in bad faith).
    27
    would be available only if the plan declined to pay for a reason forbidden by either
    paragraph (1) or (2)(A).
    2.     The Purpose of the Statute
    "In determining a statutory provision’s meaning, we may consider the
    purpose of the statute in its entirety, and whether the proposed interpretation would
    frustrate or advance that purpose." Brower v. Evans, 
    257 F.3d 1058
    , 1065 (9th Cir.
    2001) (internal quotation marks omitted). As we explain below, the MSP’s
    purpose strongly supports our interpretation of the statutory text.
    There is no dispute that "the overarching statutory purpose" of the MSP
    provisions is to "reduc[e] Medicare costs." Zinman v. Shalala, 
    67 F.3d 841
    , 845
    (9th Cir. 1995). Indeed, until the late 1980s, the sole function of the statutory
    provisions was to save Medicare money. Those versions of the MSP contained
    only provisions requiring plans to make primary payments, that is, to pay before
    Medicare.
    But beginning in the late 1980s, Congress added many provisions that go
    well beyond simply requiring plans to make primary payments. Indeed, nearly all
    of the provisions in what is now paragraph (1) protect persons from differing
    treatment by group health plans. For example, for most persons enrolled in
    Medicare—whether due to age, disability, or ESRD—group health plans generally
    may not take into account Medicare enrollment and must provide benefits identical
    28
    to those benefits received by everyone else. 42 U.S.C. § 1395y(b)(1)(A)(i)-(ii) &
    (B)(i) & (C)(i). The equal-treatment provisions apply whether or not Medicare
    even covers the particular item or service. The broader scope of the MSP
    provisions is clearer still with respect to persons diagnosed with ESRD. During
    the 30-month coordination period, plans may not take into account Medicare
    eligibility, even if the person is not in fact enrolled in Medicare.
    Id. § 1395y(b)(1)(C)(i). Moreover,
    wholly apart from Medicare enrollment or
    eligibility, plans may not offer differing benefits to persons with ESRD.
    Id. § 1395y(b)(1)(C)(ii). Those
    provisions go well beyond protecting the Medicare Trust Fund. If
    Congress’ aim were solely to protect the fisc, then Congress could have required
    that group health plans not reduce benefits in a way that caused Medicare to pay,
    or it could have limited the protections to items or services covered by Medicare.
    But Congress did much more: If a beneficiary has a "Cadillac plan," for example,
    it must remain a Cadillac plan even if the beneficiary enrolls in Medicare. Plans
    must continue coverage of all items and services—even those not covered by
    Medicare—despite the fact that coverage of those items and services could not
    possibly affect Medicare’s coffers. And plans may not treat persons with ESRD
    differently even if they are not enrolled in Medicare. Notably, some persons with
    ESRD never go on Medicare, and nearly everyone with ESRD is ineligible for
    29
    Medicare during their first three months of treatment. 42 U.S.C. § 426-1(b)(1)(A).
    Requiring payments by group health plans for persons who are not enrolled in
    Medicare also could not affect Medicare’s funds.
    In sum, the purpose of the MSP today is twofold: to protect the fisc and to
    provide equal treatment to certain categories of persons. Subparagraph (2)(A)
    aims to protect the fisc by assigning primary-payer status to private insurers, and
    paragraph (1) contains the equal-treatment provisions. The private cause of action
    refers to both provisions. Consideration of congressional purpose thus strongly
    supports our interpretation, which gives effect to both congressional purposes—
    protecting the fisc and requiring equal treatment. Notably, Defendants’
    interpretation advances only one of those purposes, by blessing blatantly unequal
    treatment so long as that mistreatment does not directly harm the fisc.5
    5
    Nor does consideration of indirect harm to the fisc aid Defendants. If
    private plans greatly reduced benefits to Medicare enrollees but still paid enough to
    prevent payment by Medicare, some of those enrollees might drop their private
    plans and rely on Medicare alone, thus saving the cost of their premiums but
    harming Medicare eventually. Viewed in that light, the equal-treatment provisions
    could be said to provide indirect protection for Medicare’s funds. One could
    accordingly view the equal-treatment provisions as simply an expression of
    Congress’ sole purpose of protecting the fisc, albeit indirectly.
    That line of reasoning fails to account for the equal-treatment provisions that
    apply to persons not enrolled in Medicare. But even overlooking that detail, the
    argument still fails on its own terms. If the equal-treatment provisions provide
    (continued)
    30
    We acknowledge that some of our sister circuits have taken a narrower view
    of the MSP’s purpose, for example, stating that "[t]he sole interest of Congress, as
    far as the statute discloses, was to provide that Medicare would not have to pay
    ahead of private carriers in certain situations." Baptist Mem’l Hosp. v. Pan Am.
    Life Ins. Co., 
    45 F.3d 992
    , 998 (6th Cir. 1995) (emphasis added); see also Harris
    Corp. v. Humana Health Ins. Co. of Fla., Inc., 
    253 F.3d 598
    , 605 (11th Cir. 2001)
    (per curiam) ("[T]he MSP statute was designed only to lower Medicare costs.");
    Perry v. United Food & Com. Workers Dist. Unions 405 & 442, 
    64 F.3d 238
    , 243
    (6th Cir. 1995) (stating that Congress enacted the MSP "in order to lower Medicare
    costs"); Glatthorn v. Indep. Blue Cross, 
    34 F. App'x 420
    , 422 (3d Cir. 2002)
    (unpublished) ("Congress enacted the MSP to cut costs in the Medicare
    program."). Some decisions also have stated that the private cause-of-action
    provision reflects that supposedly sole purpose. See, e.g., Stalley v. Catholic
    Health Initiatives, 
    509 F.3d 517
    , 524 (8th Cir. 2007) ("[T]he apparent purpose of
    the [private cause of action] is to help the government recover conditional
    indirect protection of the fisc, then allowing rigorous enforcement of those
    provisions (even when there is no direct harm to the fisc) has the effect of
    protecting Medicare’s funds. So even if we assume that Congress’ sole concern
    was reducing Medicare’s costs, our interpretation nevertheless advances that cause.
    In fact, by allowing suit in instances of both direct and indirect threats to Medicare,
    our interpretation protects Medicare’s funds better than Defendants’ interpretation
    would, because Defendants’ narrow interpretation permits suit only in cases of
    direct harm.
    31
    payments from insurers or other primary payers."); 
    Manning, 254 F.3d at 396
    ("The history of the MSP legislation is consistent with our view that the private
    right of action was created to save money for the Medicare system.");
    id. at 391–92
    ("Congress has authorized a private cause of action and double damages against
    entities designated as primary payers that fail to pay for medical costs for which
    they were responsible, which are borne in fact by Medicare."); Harris 
    Corp., 253 F.3d at 605
    n.5 (agreeing with other courts that "the fiscal integrity of the Medicare
    program must be in jeopardy in order for the private cause of action to exist");
    
    Perry, 64 F.3d at 243
    (stating that when the Medicare "program’s fiscal integrity is
    not threatened, . . . the MSP statute does not apply").
    We decline Defendants’ invitation to infer, from Congress’ purportedly
    "sole" purpose of protecting the fisc, an intent by Congress to require payment by
    Medicare as a prerequisite to bringing a private action. Most fundamentally,
    although we agree that protecting the fisc is the MSP’s overarching goal, we
    disagree that Congress had no other aims. As described in detail above, many of
    the substantive requirements in paragraph (1) go far beyond protecting Medicare’s
    funds. None of the cases just cited considered the substantive requirements of
    paragraph (1), so it is not surprising that those courts focused on the MSP’s main
    objective. We remain convinced that Congress’ purpose was dual: to protect the
    fisc and to require equal treatment in some circumstances.
    32
    Nor did those decisions, in opining on the scope of the private cause-of-
    action provision, examine the provision’s key text, which allows a suit whenever a
    primary plan fails to pay "in accordance with paragraphs (1) and (2)(A)." 42
    U.S.C. § 1395y(b)(3)(A). As described above, close analysis of that text reveals
    no intent by Congress to require payment by Medicare as a prerequisite to private
    suit. To the extent that statements in the other cases suggest that we should infer a
    requirement that Medicare must make a payment before a private cause of action
    arises, we are not persuaded.
    In enacting the MSP, Congress sought to save Medicare money, and it also
    sought to require equal treatment by group health plans in some circumstances.
    Section 1395y(b)(3)(A) reflects those dual purposes by allowing suit both in
    circumstances that threaten Medicare’s funds and in circumstances in which a
    group health plan impermissibly treats beneficiaries unequally. Consideration of
    congressional purpose thus supports our interpretation of the cause of action.
    3.     Regulatory Clues
    Finally, we consider whether regulatory documents shine any light on the
    scope of the private cause of action. We find most illuminating a rulemaking in
    1989, found at 54 Fed. Reg. 41,718. In response to a proposed rule on when
    Medicare would make payments, some commenters had requested that Medicare
    make conditional payments sooner if a primary plan declined to pay. 54 Fed. Reg.
    33
    41,718. The agency responded that Medicare did not want to assume that financial
    burden. The agency noted, as an additional reason for Medicare to decline to pay
    earlier, that Congress had created the private cause of action "if a responsible third
    party fails to pay primary benefits."
    Id. In short, the
    agency stated that, even if
    Medicare had not paid, private parties nevertheless could sue. We decline to give
    this passage, made in response to comments on a different issue, undue weight.
    But it is noteworthy that, from the beginning, the agency interpreted the private
    cause of action as not requiring payment by Medicare.
    Defendants’ regulatory citations do not advance the analysis. Title 42
    C.F.R. § 411.24(c)(i) defines the damages available in a suit by the government as
    limited to the payment made by Medicare. That definition fully accords with the
    statutory text of the governmental cause of action, which is limited expressly to
    recovery of amounts spent by the government. 42 U.S.C. § 1395y(b)(2)(B)(iii).
    The regulation neither mentions the private cause of action nor purports to define
    the damages available under the separate statutory provision defining the private
    cause of action.
    Defendants’ other two citations, the MSP Manual and 42 C.F.R.
    § 411.161(b)(2), include examples of actions by primary plans that violate the
    MSP. Defendants point to a few examples that affect Medicare’s funds. But both
    documents contain plenty of examples of nonconformance that do not affect
    34
    Medicare’s funds, such as a private plan’s charging a beneficiary higher premiums.
    MSP Manual, Ch. 1, § 70.4.A; 42 C.F.R. § 411.161(b)(2)(ii). More to the point,
    examples of nonconformance do not answer the key question: which types of
    nonconformance give rise to a private cause of action.
    In sum, to the extent that the regulatory documents relate to the scope of the
    private cause of action, they support our interpretation that payment by Medicare is
    not a prerequisite to suit.
    4.     Summary
    The statutory text, congressional purpose, and regulatory clues all point in
    the same direction: Congress intended the private cause of action to encompass
    suits resulting from statutorily noncompliant payments by primary plans. Payment
    by Medicare is not a prerequisite to suit.
    C.     Result in This Case
    For the first 20 months of Patient 1’s eligibility for Medicare due to ESRD,
    Patient 1 was a beneficiary of Virginia Mason’s Plan. DaVita alleges that, during
    that period, Defendants paid a lower rate for dialysis solely because of Patient 1’s
    eligibility for Medicare, in violation of 42 U.S.C. § 1395y(b)(1)(C). The district
    court dismissed the complaint with respect to that 20-month period because
    Medicare had not made a payment. Because we hold that payment by Medicare is
    not a prerequisite to suit, we vacate that portion of the district court’s judgment and
    35
    remand for further proceedings. We do not reach any of the alternative arguments
    raised by the parties. See Golden Gate Hotel Ass'n v. City & Cnty. of San
    Francisco, 
    18 F.3d 1482
    , 1487 (9th Cir. 1994) ("As a general rule, ‘a federal
    appellate court does not consider an issue not passed upon below.’" (quoting
    Singleton v. Wulff, 
    428 U.S. 106
    , 120 (1976))). On remand, the district court may
    address those arguments in the first instance.
    After the first 20 months, Patient 1 dropped his or her coverage under
    Virginia Mason’s Plan. Patient 1 ceased to be a beneficiary of Virginia Mason’s
    Plan, and Medicare became Patient 1’s primary insurer. The MSP designates
    Medicare as the secondary payer for the first 30 months of Medicare eligibility.
    Had Patient 1 stayed enrolled in Virginia Mason’s Plan, the Plan would have been
    the primary payer for 10 more months. As the district court held, the Plan clearly
    was not a "primary plan" during those 10 months, because Patient 1 was not a
    beneficiary of the Plan. DaVita’s theory is that it nevertheless may seek damages
    for non-payment during those 10 months because, according to DaVita’s briefing
    to us, the Plan’s reduced payments during the preceding 20 months caused Patient
    1 to drop coverage under the Plan.
    We conclude that the complaint fails to allege causation plausibly. Ashcroft
    v. Iqbal, 
    556 U.S. 662
    , 678 (2009). If the reduced payments caused Patient 1 to
    drop coverage, then Plaintiff could have so alleged. Instead, the complaint only
    36
    asserts generally that the reduced-payment scheme "incentivizes" persons to drop
    coverage, and it alleges that Patient 1 dropped coverage. The complaint fails to tie
    those two allegations sufficiently together in any plausible way.
    In the absence of a direct allegation of causation, we do not find the
    inference of causation plausible in light of the other allegations. So far as the
    complaint alleges, the Plan did not change Patient 1’s benefits in any way other
    than the amount that it paid the dialysis provider: no increased premiums,
    deductibles, or co-payments, or any other reduction in benefits that would be
    obvious to a beneficiary. Indeed, there is no allegation that Patient 1 was even
    aware of the reduction in payments from the Plan to the provider. If DaVita had
    billed Patient 1 for the balance or threatened to do so, causation might be plausible.
    But DaVita has not alleged that it did either one of those things. In other words,
    the Plan’s reduced payments for dialysis could have caused Patient 1 to leave the
    Plan only if Patient 1 noticed the change in payment amount and became
    concerned about the theoretical possibility that DaVita would bill him or her for
    the balance (even though DaVita had not done so for 20 months). The complaint
    contains neither a straightforward allegation of causation nor any allegation
    suggesting that the reduced payments caused Patient 1 to drop coverage.
    In sum, after Patient 1 dropped coverage under the Plan for a reason
    unconnected to Defendants’ obligations under the MSP, Patient 1 ceased to be a
    37
    beneficiary of the Plan, and the Plan had no obligation to pay—first, second, or at
    all. We therefore affirm the district court’s dismissal with respect to the 10-month
    period after Patient 1 dropped coverage under Virginia Mason’s Plan.
    AFFIRMED in part, VACATED in part, and REMANDED. The parties
    shall bear their own costs on appeal.
    38