Saint Mary's Hosp. v. Tommy Thompson , 416 F.3d 906 ( 2005 )


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  •                      United States Court of Appeals
    FOR THE EIGHTH CIRCUIT
    ___________
    No. 03-3905
    ___________
    St. Mary's Hospital of Rochester,        *
    Minnesota; Rochester Methodist           *
    Hospital,                                *
    *
    Appellants,                 *
    * Appeal from the United States
    v.                                 * District Court for the District
    * of Minnesota.
    1
    Michael O. Leavitt, in his official      *
    capacity as United States Secretary      *
    of Health and Human Services,            *
    *
    Appellee.                   *
    ___________
    Submitted: November 19, 2004
    Filed: July 28, 2005
    ___________
    Before SMITH, BEAM, and BENTON, Circuit Judges.
    ___________
    BEAM, Circuit Judge.
    St. Mary's Hospital and the Rochester Memorial Hospital filed suit in the
    district court against the Secretary of Health and Human Services. The suit sought
    review of the Secretary's denial of the hospitals' claim for approximately $4.1 million
    1
    Michael O. Leavitt has been appointed United States Secretary of Health and
    Human Services and is substituted as appellee under Federal Rule of Appellate
    Procedure 43(c).
    in Medicare reimbursements. The district court granted the Secretary's motion for
    summary judgment. The hospitals appeal and we affirm.
    I.    BACKGROUND
    A.     The Medicare Scheme
    1.   DRG Payments and Bundling
    Medicare is health insurance funded by the federal government for the aged
    and disabled. Before 1983, the government reimbursed hospitals for the actual costs
    of treating Medicare patients, subject to a reasonable-cost limitation. In 1983, the
    government changed its method of reimbursement to a prospective payment system.
    Social Security Amendments of 1983, Pub. L. No. 98-21, Title VI, 97 Stat. 65, 149-
    72. That change instituted a set of flat-rate reimbursements for hospitals treating
    Medicare patients. The reimbursement rates were set according to historic costs in
    a given region and applied on a prospective basis to the hospitals during the
    upcoming fiscal year. These new payments were made according to patients'
    diagnoses. Thus, with regard to a Medicare patient, treating hospitals would get a
    payment that was tied to the patient's diagnosis related group (DRG).
    For some hospitals, outside entities provided ancillary services to the hospitals'
    patients—e.g., laboratory, radiology, and physical therapy services. Before 1983,
    Medicare allowed such ancillary providers to bill Medicare directly, under Part B, for
    the reasonable costs those providers incurred in providing their services. The
    hospitals would bill their own charges to Medicare separately, under Part A. In 1983,
    as part of instituting the prospective payment system and its DRG-based
    reimbursement scheme, Congress required hospitals to bundle (or refrain from
    unbundling) the expenses associated with patient care, including the costs of services
    furnished by outside providers. 42 U.S.C. §§ 1395y(a)(14), 1395cc(a)(1)(H).
    -2-
    Keeping costs together, however, posed significant problems to hospitals that
    had followed a practice of having ancillary providers furnish services and seek
    reimbursement from Medicare separately because their accounting and billing
    systems would have to be changed. So Congress provided a waiver of the bundling
    requirements for hospitals that needed time to change.                    The waiver
    provision—section 602(k) of Pub. L. No. 98-21, 97 Stat. at 165-66, which was later
    included in the U.S. Code as a note to 42 U.S.C. § 1395y (Supp. I 1982)—gave the
    Secretary the power to allow such hospitals and their ancillary providers to continue
    their practice of separately billing unbundled charges "for any cost reporting period
    beginning prior to October 1, 1986." 97 Stat. at 165. According to the section
    602(k)-waiver provision, "Any such waiver shall provide that [the ancillary
    providers'] billing may continue to be made under part B of such title but that the
    payments to such hospital under part A of such title shall be reduced by the amount
    of the billings for such services under part B of such title." 
    Id. at 165-66.
    The part
    B payments to the ancillary providers were not calculated according to the patient's
    DRG. Rather, those payments were calculated on a reasonable-cost basis. Thus,
    Medicare would reimburse ancillary providers according to what it cost the ancillary
    provider to provide the services. Under the waiver provision, then, a waiver
    hospital's DRG payment was reduced by the reasonable costs of ancillary services
    billed by and paid to the ancillary provider.
    2.   Teaching Hospitals
    When Congress implemented the DRG system, it was concerned that those
    payments would not adequately reimburse teaching hospitals because such hospitals
    typically have higher costs per patient than non-teaching hospitals. S. Rep. No. 98-
    23, at 52 (1983), reprinted in 1983 U.S.C.C.A.N. 143, 192; H.R. Rep. No. 98-25, at
    140 (1983), reprinted in 1983 U.S.C.C.A.N. 219, 359. Thus, the DRG
    payment—calculated on average per-patient costs in a particular region—would not
    reflect teaching hospitals' increased expenses. The prior reimbursement system also
    -3-
    had this problem because the reasonable-cost limitations it used were similarly
    calculated, though not on a prospective basis. Under the prior system, Congress had
    allowed adjustments to the reasonable-cost limitations if a provider could show its
    increased costs were due to its educational activities. Under the new system,
    Congress carried forward the policy of paying teaching hospitals more, allowing their
    increased expenses to be separately reimbursed by Medicare. Three types of
    increased costs were identified: direct medical education (DME) expenses, capital
    expenses, and indirect medical education (IME) expenses. DME expenses are
    expenses like residents' salaries—quantifiable expenses directly related to teaching.
    Capital expenses are those expenses like depreciation and rents. And IME expenses
    reflect the general inefficiencies associated with patient care provided by residents
    and interns, including "the additional tests and procedures ordered by residents as
    well as the extra demands placed on other staff as they participate in the educational
    process." 
    Id. IME expenses
    are not easily quantified. So the Secretary created a formula to
    calculate how much money teaching hospitals would get for IME expenses. That
    formula—derived from a statistical analysis of teaching hospitals' costs compared to
    non-teaching hospitals' costs that takes into account the ratio of residents and interns
    to beds, 45 Fed. Reg. 21,584 (Apr. 1, 1980)—basically allows teaching hospitals to
    get a payment that represents a fraction of their DRG revenue. For example, if the
    Secretary's formula—which is now codified in 42 U.S.C. § 1395ww(d)(5)(B)—yields
    an "indirect teaching adjustment factor" of .10, then a teaching hospital that has
    $10,000 of DRG revenue in a given cost reporting period (i.e., fiscal year) would get
    an additional payment of $1,000 as reimbursement for IME expenses.
    B.     The Mayo System and the Hospitals' IME Reimbursements
    St. Mary's, Rochester, and the Mayo Clinic are all teaching facilities. The two
    hospitals house patients who are treated by the Mayo Clinic's physicians, residents,
    -4-
    and interns. The Mayo Clinic also provided ancillary services to the hospitals'
    patients. Before the 1983 changes took effect, the Mayo Clinic billed Medicare
    separately for the ancillary services that it provided to the hospitals' patients. Under
    the bundling provisions, however, those charges would need to be billed by the
    hospitals, who would then pay the Mayo Clinic for its services. But St. Mary's and
    Rochester were given a section 602(k) waiver. Thus, during the cost reporting
    periods at issue2 the Mayo Clinic billed Medicare for the reasonable cost of the
    ancillary services it provided to the hospitals' patients. And these payments reduced
    the hospitals' DRG payments.
    St. Mary's and Rochester disputed their Medicare reimbursements for the
    relevant cost reporting periods with their fiscal intermediary, Blue Cross and Blue
    Shield of Minnesota, claiming that they had been deprived of reimbursement for
    DME, capital, and IME expenses that they had incurred. Blue Cross sought advice
    from the Health Care Financing Administration (HCFA).3 The HCFA responded on
    August 24, 1984, with a letter from Michael J. Angellotti, the Chief of the
    Reimbursement and Recovery Branch of the Division of Financial Operations.
    Mr. Angellotti dealt with two issues that Blue Cross had apparently raised, both
    of which questioned the extent to which the Mayo Clinic's charges should reduce the
    hospitals' DRG payments. The first dealt with DME and capital expenses. Mr.
    Angellotti reasoned that the Mayo Clinic's payments, the amount of which was
    determined on a reasonable-cost basis, included some amount of capital and DME
    costs that the Mayo Clinic had incurred and billed to Medicare as reasonable costs.
    "[I]n the interest of equity," Mr. Angellotti concluded that the hospitals should not be
    2
    St. Mary's disputes its reimbursement for the cost reporting periods beginning
    on July 1, 1984, and July 1, 1985. Rochester disputes its reimbursement for the cost
    reporting periods beginning on January 1, 1984, and January 1, 1985.
    3
    The HCFA is now known as the Centers for Medicare and Medicaid Services.
    -5-
    charged with the Mayo Clinic's capital and DME costs through a reduction in the
    hospitals' DRG payments. In other words, Mr. Angellotti concluded that the offset
    that the section 602(k) waiver required had to be reduced. To make that reduction,
    he concluded that Blue Cross should determine what portion of the Mayo Clinic's
    total ancillary-services charges were attributed to DME and capital costs. This was
    to be done by multiplying the total nonphysician charges by the "ratio of capital and
    direct medical education cost to total cost of the [Mayo Clinic]." The resulting
    amount was not to be included in the reduction of the hospitals' DRG payments.
    Thus, he told Blue Cross to reduce the 602(k)-waiver offset by the amount of the
    charges that were attributed to the Mayo Clinic's DME and capital costs.
    The second issue that Mr. Angellotti dealt with was whether the hospitals were
    entitled to an "indirect teaching adjustment" based on an unreduced DRG
    payment—i.e., an IME payment calculated from the DRG payment before the 602(k)-
    waiver offset for the Mayo Clinic's payments. Mr. Angellotti concluded that
    [the hospitals] do not incur indirect medical education costs in the
    ancillary departments where the ancillary services are provided by the
    Mayo Clinic. Therefore, the indirect teaching adjustment factor should
    be applied to the . . . [hospitals'] Medicare payments . . . net of the . . .
    billings of the Mayo Clinic, after the reduction of the . . . billing offset
    to reflect capital and direct medical education costs incurred by the
    Mayo Clinic.
    St. Mary's and Rochester appealed that decision to the Provider Reimbursement
    Review Board (PRRB), claiming they were owed over $4.1 million in IME
    reimbursements. The PRRB affirmed the HCFA's decision.4 It concluded that a 1986
    amendment to the 602(k)-waiver provision showed a congressional intent to leave in
    place the Secretary's interpretation of how the 602(k) waiver affects the IME
    4
    It appears that this case was pending before the PRRB for more than ten years.
    No explanation for the delay appears in the record or the parties' briefs.
    -6-
    reimbursement scheme for the cost reporting periods beginning before January 1,
    1986—the effective date of the amendment. Consolidated Omnibus Budget
    Reconciliation Act of 1985, Pub. L. No. 99-272, § 9112, 100 Stat. 82, 163 (1986).
    After exhausting their administrative remedies, St. Mary's and Rochester
    sought review in the district court. The district court5 affirmed the PRRB's decision,
    and so do we.
    II.   DISCUSSION
    We review the district court's decision de novo. Shalala v. St. Paul-Ramsey
    Med. Ctr., 
    50 F.3d 522
    , 527 (8th Cir. 1995).
    A.     Congressional Intent
    Under Chevron U.S.A., Inc. v. Natural Res. Def. Council, Inc., 
    467 U.S. 837
    (1984), the question we must first address, "always, is . . . whether Congress has
    directly spoken to the precise question at issue." 
    Id. at 842.
    So we look to the
    statute's plain language. And if we, "employing traditional tools of statutory
    construction, ascertain[] that Congress had an intention on the precise question at
    issue, that intention is the law and must be given effect." 
    Id. at 843
    n.9.
    St. Mary's and Rochester argue that the decision not to calculate their IME
    reimbursement from an unreduced DRG payment was contrary to Congress's
    unambiguously expressed intent. We disagree. We have reviewed the legislative
    history accompanying the original 1983 version of section 602(k) and the IME-
    reimbursement provisions. We conclude that neither the statutes' plain language nor
    5
    The Honorable Donovan W. Frank, United States District Judge for the
    District of Minnesota.
    -7-
    any discernible congressional intent on the precise question at issue resolves this
    case. The hospitals' arguments, however, are premised primarily on the 1986
    amendment to the 602(k)-waiver provision. That amendment, among other things,
    added a new subsection (2) to 602(k):
    In the case of a hospital which is receiving payments pursuant to a
    waiver under paragraph (1), payment of the adjustment for indirect costs
    of approved educational activities shall be made as if the hospital were
    receiving under part A of title XVIII of the Social Security Act all the
    payments which are made under part B of such title solely by reason of
    such waiver.
    Pub. L. No. 99-272, § 9112, 100 Stat. at 163. The amendment also included effective
    dates for both the new subsection (2), and the new subsection (3)(a):
    (b) Effective Dates.—(1) Section 602(k)(2) of the Social Security
    Amendments of 1983 (as added by subsection (a)) shall apply to cost
    reporting periods beginning on or after January 1, 1986.
    (2) Section 602(k)(3) of the Social Security Amendments of 1983
    (as added by subsection (a)) shall apply to items and services furnished
    after the end of the 10-day period beginning on the date of the enactment
    of this Act.
    
    Id. In sum,
    Congress's implemented the very construction of the statutes that the
    hospitals now champion. But Congress didn't go all the way back to 1984. Instead,
    it chose to use specific effective dates for the provisions it was adding. And, with
    regard to subsection (2), Congress chose cost reporting periods that began over four
    months before the law's enactment on April 7, 1986.
    Both the district court and the PRRB hung their hats on the statute's effective
    date. We agree that the amendment plainly states how 602(k)-waiver offsets affect
    a hospital's IME reimbursements for cost reporting periods beginning on or after
    -8-
    January 1, 1986. But, as we explain below, that does little to settle the question
    presented here—whether or not the Secretary could reach a different conclusion for
    cost reporting periods beginning before January 1, 1986. So we disagree with the
    district court and the PRRB insofar as they ruled that Congress's 1986 amendment
    closed the door on the hospitals' claim.
    Congress, when it made the 602(k)-waiver amendment in 1986, did not speak
    to those prior years in the statute. It neither expressly endorsed nor prohibited the
    Secretary's construction of the statute by spelling out how IME reimbursements
    should be calculated for the cost reporting periods at issue in this case. See Red Lion
    Broad. Co. v. FCC, 
    395 U.S. 367
    , 380-81 (1969) ("Subsequent legislation declaring
    the intent of an earlier statute is entitled to great weight in statutory construction."
    (emphasis added)); Consumer Prod. Safety Comm'n v. GTE Sylvania, 
    447 U.S. 102
    ,
    118 n.13 (1980) (distinguishing between subsequent legislation and statements made
    in hearings and committee reports); Johnson v. United States Dep't of Hous. and
    Urban Dev., 
    911 F.2d 1302
    , 1310 (8th Cir. 1990).
    The legislative history to the 1986 amendment is similarly unavailing. The
    amendment was part of budget-reconciliation legislation that took a storied path in
    the 99th Congress. The legislation originated in separate bills. In the House of
    Representatives, H.R. 3128 began with no provision regarding the interaction of IME
    reimbursements and the section 602(k) waiver. In the Senate, S. 1730 had such a
    provision, but in a much sparser form than was eventually passed:
    SEC. 710. INDIRECT TEACHING ADJUSTMENT FOR CERTAIN
    CLINICS.
    In the case of a hospital which is receiving payments under title
    XVIII of the Social Security Act pursuant to a waiver under section
    602(k) of the Social Security Amendments of 1983, payment of the
    adjustment for indirect costs of approved educational activities shall be
    made as if such hospital were receiving under part A of such title all the
    -9-
    payments which are made under part B of such titles solely by reason of
    such waiver.
    S. 1730, at 164, reprinted in 131 Cong. Rec. at 27,490.
    H.R. 3128 passed the House. The Senate struck the entirety of the House's
    version, substituted the text of S. 1730, including section 710, and sent the amended
    bill back to the House. 131 Cong. Rec. at 31,974-75. The House, in turn, struck the
    entirety of the Senate's amendment to H.R. 3128, and substituted the original text of
    H.R. 3128. 131 Cong. Rec. at 34,511-12. The bill then went to a joint conference
    committee. The conference committee reported an amended bill, H.R. Rep. No. 99-
    453, reprinted in 131 Cong. Rec. at 38,124, along with a joint explanatory statement,
    131 Cong. Rec. at 38,234. The conference committee's amended bill included the
    language of H.R. 3128 that eventually became the 602(k)-waiver amendment at issue
    here, 131 Cong. Rec. at 38,151-52, and the effective dates appeared for the first time
    in that amended bill. The explanatory statement is the only indicia we have of why
    Congress included the effective date in the ultimate legislation.6
    We need go no deeper into the legislative history to evaluate the parties'
    arguments. The hospitals argue that the 602(k)-waiver amendment was a "clarifying"
    amendment, geared at overruling the Secretary's construction of the statute under the
    rubric of declaring Congress's original intent. The Secretary, on the other hand,
    argues that the 602(k)-waiver amendment was a "changing" amendment, geared at
    changing the way in which the statute dealt with IME reimbursement from the
    effective date on.
    6
    The House initially rejected the conference's report, but it is still indicative of
    the legislative intent regarding the 602(k) amendment for our purposes because
    Congress later passed the suggested amendment to 602(k) as it appeared in the
    conference committee's amended bill.
    -10-
    The hospitals garner support for their argument from the legislative history
    accompanying the original Senate bill. The Senate Budget Committee issued a
    comprehensive report, S. Rep. No. 99-146 (1985), incorporating various other
    committee's analyses of the legislation. 
    Id. at 19.
    The Finance Committee's portion
    of the analysis explained the Senate's proposed amendment to section 602(k):
    Current law.—For the first three years of the prospective payment
    system (PPS), a special exception is applied to hospitals which had
    traditionally allowed direct billing under Part B so extensively that it
    would have been disruptive to immediately require them to bill for all
    such services under Part A. . . . The Health Care Financing
    Administration has ruled that in such split payment cases, the indirect
    teaching adjustment would apply only to the portion of the Medicare
    payment that is paid through Part A.
    Explanation of provision.—The provision would clarify that the
    split payment provisions was [sic] only intended to provide a temporary
    billing accommodation for certain hospitals and that the indirect
    teaching adjustment should be applied as if the entire PPS payment had
    been made under Part A.
    Effective date.—Enactment.
    
    Id. at 294,
    reprinted in 1986 U.S.C.C.A.N. at 42 at 261. The conference report, which
    included a substantially different version of the 602(k) amendment (the one that
    eventually passed), included a joint explanatory statement. In that statement, the
    conference committee recounted the current-law and explanation-of-provision
    language from the Senate Report and explained the conference's agreement:
    The conference agreement includes the Senate amendment [the language
    of S. 1730 that was substituted for H.R. 3128's language], with the
    following modifications. . . . Payment of the indirect teaching
    adjustment as if all services were billed under the PPS payment methods
    in part A, will be effective with the first hospital cost reporting period
    beginning on or after January 1, 1986.
    131 Cong. Rec. at 38,259.
    -11-
    From this, all we can glean is that Congress intended the amendment to take
    effect on January 1, 1986. The hospitals' citation of the word "clarify" from the
    Senate Report, in conjunction with an expression of what the Senate thought the
    earlier Congress intended—"was only intended to"—and the report's mention of the
    HCFA's decision, are somewhat indicative of the Senate's intent to change what the
    administration had done under the 1983 legislation. And it at least implies that the
    Senate thought the HCFA had erred in its construction of the statute. But the
    language that ultimately made it into the statute was derived from the conference
    committee's amended bill in which the conference included the Senate's proposal with
    modifications. One of those modifications was the effective date. This indicates that
    Congress did not want to change the rules that far back. And the statements included
    in the legislative history to the Senate's bill provide "'a hazardous basis for inferring
    the intent of an earlier [Congress].'" United States v. Philadelphia Nat'l Bank, 
    374 U.S. 321
    , 349 (1963) (quoting United States v. Price, 
    361 U.S. 304
    , 313 (1960));
    accord Consumer Prod. Safety 
    Comm'n, 447 U.S. at 118
    n.13.
    Moreover, once we consider the context of the legislation—as part of a budget
    reconciliation act geared at cutting costs—the hospitals' interpretation of the
    amendment as being applicable to cost reporting periods starting before January 1,
    1986, would surely frustrate the congressional intent evident in 1986. In sum, even
    if the Senate wanted to "clarify" the statute, Congress appears to have decided that
    it could not afford to make that adjustment retroactive to 1984.
    Taken in this light, we know two things about the 1986 amendment: (1) Two
    committees were aware of the HCFA's decision regarding IME reimbursement, and
    (2) Congress clearly enunciated the way in which IME reimbursements were to be
    calculated for cost reporting periods beginning on or after January 1, 1986. But we
    do not take the 1986 amendment as far as the district court and the PRRB did; we do
    not glean from the amendment an indication that Congress acquiesced in or validated
    the Angellotti decision for the cost reporting periods beginning before January 1,
    -12-
    1986. See S.E.C. v. Sloane, 
    436 U.S. 103
    , 121 (1978) (questioning acquiescence in
    a case where it was "based only upon a few isolated statements in the thousands of
    pages of legislative documents"). Congress's intent with regard to how the waiver
    provision and the IME reimbursement mechanism should interact was unclear in 1983
    when it enacted the statutes that govern the cost reporting periods at issue. And
    Congress's 1983 intent remained as unclear after the 1986 amendment.7
    B.      The Secretary's Interpretation
    With the 1983 congressional intent in doubt, and with no clarification of that
    original intent in the subsequent amendment, we turn to the Secretary's interpretation
    of the 1983 legislation. In 1983, Congress did not address the precise issue presented
    here: whether or not the 602(k) waiver should reduce the hospitals' DRG
    reimbursement for purposes of calculating the hospitals' IME reimbursements. So the
    Secretary was left with little or no statutory guidance. When such a gap is filled by
    regulation or formal agency adjudication, we will hold such a construction
    impermissible only if the agency acted unreasonably. 
    Chevron, 467 U.S. at 843-44
    .
    The formal adjudication of this matter—the PRRB decision—did not reach the
    question presented here because it viewed the 1986 amendment as dispositive.
    However, the Angellotti letter interpreted the statutes as they applied to the hospitals'
    reimbursements. That letter is not entitled to Chevron-type deference because it does
    not appear to have "the force of law." Christensen v. Harris County, 
    529 U.S. 576
    ,
    587 (2000). Indeed, the PRRB regarded Mr. Angellotti's letter as "more interpretive
    7
    Relying on the legislative history to the Senate bill, the hospitals' attempt to call into
    doubt the phrase "cost reporting period" by arguing that the period should be calculated based
    on repayment, which is triggered by the Notice of Program Reimbursement (NPR), and
    apparently delayed a year or two after the actual "cost reporting period." The argument is
    unpersuasive as we have already explained that the legislative history to the Senate bill is not
    dispositive of Congressional intent. Furthermore, the statute clearly refers to "cost reporting
    period" and makes no mention of repayment or the NPR.
    -13-
    in nature than authoritative." However, the Angellotti letter does represent the
    HCFA's, and therefore the Secretary's, interpretation of the statute. Thus it is
    "'entitled to respect'" to the extent it has the "power to persuade." 
    Christensen, 529 U.S. at 587
    (quoting Skidmore v. Swift & Co., 
    323 U.S. 134
    , 140 (1944)). Under that
    standard, an agency interpretation may stand if it is persuasive. Kai v. Ross, 
    336 F.3d 650
    , 655 (8th Cir. 2003). We are persuaded by the Secretary's interpretation.
    The IME reimbursements in this case were calculated based on the amount of
    money each hospital received. The waiver, by the express terms of the statute,
    reduced the amount of money each hospital received. Thus, the waiver had the
    incidental effect of reducing the IME reimbursement. The 1983 statute does not
    require or prohibit this effect of the waiver provision, and the legislative history of
    the 1983 legislation does not reveal a congressional intent that it should or should not
    occur. But the incidental reduction to IME reimbursement makes sense. The IME
    reimbursement is meant to compensate hospitals for the inherent shortfalls that arise
    from the DRG payment system. Because DRG's are calculated on a region-wide basis
    that includes non-teaching hospitals, teaching hospitals likely would not be
    adequately compensated because it costs them more to provide the same services as
    non-teaching hospitals. But when a portion of the services associated with a patient's
    care are not provided by the teaching hospital, then it makes little sense to reimburse
    the non-providing teaching hospital for its inefficiencies. Because the hospitals did
    not deliver the services for which the Mayo Clinic was paid, the inefficiencies that
    arise from the hospitals' teaching activities had no discernable effect on the total cost
    of the patient's care. In other words, the hospitals could not have inefficiently
    delivered services that they did not deliver. And the hospitals have offered no
    evidence to the contrary.
    Given the statutory provision that requires a reduction in the waiver hospitals'
    DRG payments by the ancillary providers' reasonable costs, and the statutes' failure
    to address how that offset should affect IME reimbursements calculated from DRG
    -14-
    payments, the Secretary had a gap to fill. The Secretary's interpretation of the statute
    was logical because it fully reimbursed the hospitals for their costs, including
    whatever inefficiencies may have arisen because of their teaching activities.8
    III.   CONCLUSION
    Accordingly, we affirm.
    ______________________________
    8
    The hospitals finally make due-process and equal-protection arguments. We
    reject these claims because neither of them were raised below. The hospitals, in their
    reply brief, cite their Memorandum in Support of Summary Judgment as raising the
    issue before the district court. That document has not been included in the appendix,
    but according to the brief it says, "the Angellotti letter's interpretation results in an
    arguably unconstitutional distinction among similarly situated hospitals." App. Reply
    Br. at 18. That statement did not present the issue to the district court. See Larken,
    Inc. v. Wray, 
    189 F.3d 729
    , 735 (8th Cir. 1999). And we see no plain error.
    -15-