Court Opinion

ID: 9880824
Source: CourtListenerOpinion
Date Created: 2023-09-28 19:01:36.834338+00
Date Added: 2024-06-11T13:57:51.298761
License: Public Domain

UNITED STATES DISTRICT COURT
                             FOR THE DISTRICT OF COLUMBIA

 MEDICA INSURANCE CO.,

           Plaintiffs,

 v.                                                       Case No. 1:22-cv-1440-RCL

 XAVIER BECERRA,
 Secretary of Health and Human Services,

            Defendant.

                                  MEMORANDUM OPINION

           This is an appeal from a decision of the Administrator of the Centers for Medicare &

Medicaid Services (CMS) brought by Medica Insurance Company, a Health Maintenance

Organization (HMO). The Administrator held that a formula used to calculate how much of

Medica’s costs Medicare must reimburse cannot include certain charges from doctors that were

erroneously billed to an entity other than Medica. Because Medica counted such charges in its

reimbursement calculations, the Administrator ruled that Medica owed CMS over six million

dollars.

           Before the Court are Medica’s motion for summary judgment (ECF No. 15) and the

Secretary of Health and Human Services’ cross-motion for summary judgment (ECF No. 29). The

Court holds that the Administrator misinterpreted the regulation governing that formula because

its text, read in context, unambiguously permits inclusion of such charges. By excluding these

charges, the Administrator effectively amended the regulation without engaging in the necessary

notice-and-comment rulemaking procedure.        And even if the Administrator’s reading were

permissible, the Court would still grant summary judgment to Medica because the Administrator’s

                                                1
unexplained change in position was arbitrary and capricious. Therefore, the Court will GRANT

Medica’s motion for summary judgment, DENY the Secretary’s cross-motion, and REMAND the

matter to the agency for further proceedings consistent with this opinion.

                                         I.    BACKGROUND

        The Court will first discuss the statutory and regulatory backdrop for Medica’s dispute with

CMS. Then it will explain the specific dispute over “carrier-paid claims.” Next it will recount the

steps that led the parties to this Court.

    A. Statutory and Regulatory Framework

        1. Medicare and Cost Plan HMOs

        Medicare is a government health insurance program that provides coverage to eligible

people who are either disabled or age 65 or older. See 42 U.S.C. § 1395c. It is administered by

CMS. Medicare Part B is an optional, supplemental government-subsidized insurance program

that covers bills relating to physician, hospital outpatient, and other services. Administrative

Record (AR) 996 n.2.1 An entity that furnishes health care services under Part B, such as a doctor,

is called a “supplier.” 42 C.F.R. § 400.202.

        One way for a Medicare beneficiary enrolled in Part B to receive benefits is to go with a

traditional fee-for-service approach under which suppliers’ charges for medical services are paid

by Medicare. Gov. MSJ, ECF No. 29 (as corrected), at 3. The supplier files its claim not with

Medicare itself, but instead with a private company assigned to the supplier, known as a Medicare

Administrative Contractor (“MAC”) or a “carrier.” Id. at 3. The MAC helps administer the

1
 In accordance with Local Rule 7(n), the parties submitted a Joint Appendix containing relevant portions of the
Administrative Record. See Joint Appendix (ECF Nos. 37, 37-1, 37-2, 37-3). When the Court refers to the
Administrative Record, it will cite to the Bates numbers printed at the bottom of each page.

                                                      2
Medicare Part B fee-for-service program. It processes the supplier’s claim and, if it is covered by

Medicare, pays Medicare’s share of the claim. Id. at 3.

       A second way for a Medicare beneficiary enrolled in Part B to receive benefits is to join a

managed care organization. These include HMOs, which organize networks of suppliers with

whom the HMO has contracted. See 42 CFR § 417.548. If you are a Part B beneficiary enrolled

in an HMO, you will go to an in-network supplier, such as a doctor, for medical services. The

supplier will then charge the HMO for the service provided to you at a price set for that particular

type of medical service by the contract between the HMO and the supplier. In turn, Medicare will

reimburse the HMO.

       This case concerns a particular kind of HMO. The great majority of Medicare beneficiaries

are served by HMOs operating under the Medicare Advantage program. AR 996. However, a

minority of beneficiaries receive their healthcare through what is known as a “cost plan” HMO.

The distinctive feature of a cost plan HMO is that Medicare pays it for the “reasonable cost” of the

reimbursable services it has provided to its Medicare beneficiaries. AR 996; see also 42 U.S.C.

§ 1395mm(h)(2); 1395x(v)(1)(A); 42 C.F.R. § 417.524(b)(2).          Under the Medicare Act, the

“reasonable cost” of these services are defined in relevant part as “the cost actually incurred,

excluding therefrom any part of incurred cost found to be unnecessary in the efficient delivery of

needed health services.” 42 U.S.C. § 1395x(v)(1)(A). This figure is to be “determined in

accordance with regulations establishing the method or methods to be used, and the items to be

included.” Id.. The method of determining these costs must conform to the prohibition on cross-

subsidization, meaning “the necessary costs of efficiently delivering covered services to

individuals covered by the insurance programs established by [the Medicare Act] will not be borne

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by individuals not so covered, and the costs with respect to individuals not so covered will not be

borne by such insurance programs.” Id..

       2. Calculation of Reasonable Costs

       Calculating the reasonable costs for which Medicare will reimburse the cost plan HMO is,

unfortunately, not as simple as tallying up the specific amounts the HMO paid to suppliers for

Medicare beneficiaries. The problem with that approach comes from the fact that the HMO has

both Medicare and non-Medicare patients. As a result, the HMO has certain costs, such as

administrative and general costs, that are spread across the business and cannot be neatly attributed

to any single visit to the doctor’s office, X-ray, or the like. CMS’s solution has been to embrace a

method of “apportionment” to determine how much of the HMO’s expenses—including the costs

of physicians and suppliers as well as administrative and general costs—Medicare should

reimburse. See 42 C.F.R. § 417.560(c). This regulation, the “Cost Apportionment Regulation,”

provides a mathematical formula to apportion costs between Medicare enrollees and non-Medicare

enrollees and thus determine the reasonable cost for which Medicare ought to reimburse the HMO.

See id.. The purpose of the formula is to create a statistical proxy for the actual costs attributable

to the HMO’s Medicare claims rather than its non-Medicare claims. See AR 16; Pl. MSJ, ECF

No. 15, at 15–16; Gov. MSJ at 5.

       In this case, it is undisputed that the applicable cost plan apportionment formula is that laid

out in 42 C.F.R. § 417.560(c). AR 78. Under this method, “the Medicare share of the cost of Part

B physician and supplier services furnished to Medicare enrollees under arrangements, and paid

for by the HMO . . . is determined by multiplying the total amount for all such services by the ratio

of charges for covered services furnished to Medicare enrollees to the total charges for all such

services.” 42 C.F.R. § 417.560(c). In plain English, this means one first tallies up the total cost

                                                  4
of all services, including both “(1) the direct costs associated with furnishing services to Medicare

and non-Medicare enrollees, and (2) certain indirect costs, such as enrollment and operations

costs.” Rocky Mountain Health Maint. Org., Inc. v. Price, 297 F. Supp. 3d 152, 155 (D.D.C. 2018)

(Rocky Mountain I) (emphasis omitted). That figure is then multiplied by the apportionment ratio.

This consists of a numerator—“charges for covered services furnished to Medicare enrollees”—

divided by a denominator—“the total charges for all such services.” The calculation produces

“[t]he HMO’s reimbursable ‘costs actually incurred’ under the Medicare Act.” Rocky Mountain

I, 297 F. Supp. 3d at 155.

       3. Reimbursement

       Reimbursement of the cost plan HMO occurs through preliminary monthly payments and

a yearly reconciliation process that results in a final settlement for that period. At the close of the

fiscal year, the HMO submits a “cost report” to CMS that provides its total allowable costs for that

fiscal year. See 42 C.F.R. §§ 417.570-417.576. To ensure that it pays only its share of the HMO’s

allowable costs—and does not improperly subsidize the HMO’s non-Medicare operations—CMS

reviews the cost report. See 42 U.S.C. §§ 1395x(v)(1)(A), 1395mm(h)(3)–(4); 42 C.F.R. §§ 413.9,

413.24, 417.532, 417.534, 417.568, 417.576. If CMS is satisfied with the cost report, it issues a

Notice of Program Reimbursement containing its final determination of how much the HMO will

be reimbursed for the reporting period. See 42 C.F.R. § 405.1803(a)(1), 417.576(d)-(e). This

figure is compared to the monthly preliminary payments CMS has made to the HMO over the year

so that any necessary retroactive adjustment can be made. See 42 U.S.C. § 1395x(v)(1)(A). If

there has been overpayment, the HMO pays CMS; if there has been underpayment, CMS pays the

HMO. 42 C.F.R. § 405.1803(c), 413.60(c).

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        If the HMO objects to CMS’s final determination, it may pursue administrative and judicial

review. First, it may seek a hearing before an in-house CMS hearing officer. See 42 C.F.R.

§ 417.576(d)(4). The hearing officer’s decision is subject to review by the CMS Administrator.

The final agency action is either the decision of the hearing officer or, if the Administrator reviews

that decision, the decision of the Administrator. From there, the HMO may seek review in federal

district court. 42 U.S.C. § 1395oo(f)(1).

        4. Carrier-Paid Claims

        If you find this system difficult to understand, you are not alone. In fact, this case arises

from doctors and other providers repeatedly failing to realize which claims are supposed to go to

HMOs and which are supposed to go to MACs. On occasion, the HMO’s in-network supplier will

provide services to the HMO’s Medicare beneficiary member, but instead of submitting the claim

to the HMO, it will erroneously submit the claim to a MAC. Or it may submit the claim to them

both. When either happens, the MAC will pay the provider without involving the HMO because

the MAC is legally required to promptly pay all “clean claims” (i.e., claims without defects or

impropriety). 42 U.S.C. § 1395u(c)(2)(A)(i), (c)(2)(B)(i); AR 20. When a MAC pays a provider

directly and without the HMO’s involvement, those are known as a “carrier-paid claims.” Rocky

Mountain I, 297 F. Supp. at 152.2 This case turns on whether the HMO can receive reimbursement

from Medicare for such charges.

2
  Medica calls these “MAC/Medica claims,” emphasizing Medica’s role, while the Secretary calls these “MAC-
incurred charges,” minimizing it. The Court opts for a more neutral term. See Scott & White v. Becerra, No. 22-cv-
3202 (CRC), 2023 WL 6121904, at *1 (D.D.C. Sept. 19, 2023) (referring to these charges as “carrier-paid claims”).

                                                        6
   B. Factual History

       1. Medica’s Processing of Carrier-Paid Claims

       The plaintiff in this case is Medica Insurance Company, which operates a cost plan HMO.

Pl. MSJ at 6. As with other cost plan HMOs, Medica contracts with physicians and other suppliers

to provide Medicare Part B services to its cost plan enrollees. Pl. MSJ at 6–7; AR 69, 116. Once

an in-network supplier provides care to a beneficiary, the supplier should send a claim to Medica.

Pl. MSJ at 7; AR 69. Medica will then process the claim. Medica also generates an Explanation

of Benefits that provides the enrollee with information about the service and payment. AR 69–70.

Medica contends that it cannot create an EOB without actually processing and paying the claim

itself. AR 119 (Tr. 33:9–21), 123 (Tr. 51:1–19).

       And as with other cost plan HMOs, Medica must deal with the recurring problem of

physicians erroneously submitting a claim to a MAC instead of, or in addition to, Medica. AR 120

(Tr. 40:8–21). To be clear, payments made by the MAC on such claims are made in error, as

responsibility for paying the carrier-paid claim lies with Medica, not the MAC. AR 121 (Tr. 41:6–

10). Sometimes the physician’s billing office bills both the MAC and Medica. AR 121 (Tr. 41:11–

42:24). When that occurs, Medica says it often pays the claim before MAC does, and thus does so

without knowledge that the MAC will later pay the same claim. Pl. MSJ at 8; see AR 117–118.

Usually, however, a carrier-paid claim arises because the physician billed the MAC instead of

Medica. AR 121 (Tr. 41:11–42:24).

       When the MAC pays the claim, it often fails to pay the correct amount to the physician

because it lacks key information such as the payment amount set by contract between Medica and

the supplier. AR 119 (Tr. 34:2–23). Instead of paying the contractual rate, it pays the Medicare

fee-for-service rate. AR 121 (Tr. 42:25–43:13). When a MAC pays a carrier-paid claim, Medica

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will still process the claim. AR 121 (Tr. 42:2–24). This means that Medica “(i) determines the

correct amount due the physician under Medica’s contract with the physician, (ii) calculates the

co-pay, deductible, or coinsurance due from the patient, (iii) recoups the erroneous MAC payment,

(iv) processes the payment to the physician at the correct payment amount, after factoring in the

correct patient contribution, and (v) gives the patient credit toward any annual deductible or cost-

sharing obligation.” Pl. MSJ at 9 (citing AR 121–24).

       When Medica says it “recoups the erroneous MAC payment,” that refers to a bookkeeping

maneuver. Basically, if Medica sees that the MAC has erroneously paid the doctor, say, $100 for

a patient’s check-up, Medica goes into its system, subtracts $100, and pays or invoices the supplier

for any difference between what the MAC paid and what Medica should have paid. See AR 123,

125. Then at the end of the year when Medica compiles its cost report, it credits the $100 to the

government. AR 125 (Tr. 57:11–25). So Medica does not directly profit from the MAC’s mistake.

But it uses the carrier-paid claim to boosts the sum that it will receive from the government as

reimbursement by including the $100 associated with the carrier-paid claim in the numerator and

denominator of the apportionment ratio, AR 126—even though because the MAC actually paid

the doctor the $100, “the HMO incurs no out-of-pocket costs for those services, except perhaps a

residual sum.” Rocky Mountain I, 297 F. Supp. at 152. Medica does, however, expend resources

processing the claim. AR 127.

       Medica justifies processing and paying the claim, even though the MAC has already paid

all or much of the claim, because “[i]t would be impossible for Medica to correct the physician

and patient payment amount, give the patient credit toward his or her annual limits, and/or generate

an EOB without actually processing and paying the physician claim.” Pl. MSJ at 9 (citing AR 119

(Tr. 33:9–21)). Medica cannot simply put a note in the file or edit the record, it says, because not

                                                 8
actually processing and paying the claim “would undermine the integrity of the system, disrupt the

audit trail, and open the door to fraudulent activity.” Pl. MSJ at 9 (citing AR 123 (Tr. 51:1–19)).

       2. Medica’s 2006–2011 Cost Reports

        At issue in this case are Medica’s annual cost reports for the years 2006 through 2011.

For each cost report, Medica included the carrier-paid claims it had processed. AR 124–25

(Tr. 56:15–57:10). Medica also credited to CMS the funds it had recouped from doctors for the

erroneous carrier-paid claim. AR 125 (Tr. 57:11–25). What this means is that Medica submitted

a cost report intended to both “reflect as if the error had not been made,” by looking as if Medica

only had paid the claim, and to “unwind that erroneous payment,” by returning to CMS the money

the MAC had erroneously paid to the physician by including the sum on a settlement sheet called

Worksheet M. AR 125 (Tr. 57:11–25, 58:9–22). The key fact is that when Medica calculated the

cost to which it was entitled to reimbursement, it included the charges associated with the carrier-

paid claims in the apportionment ratio’s numerator and denominator. See AR 124–26.

   C. Procedural History

       Initially, CMS issued two Notices of Program Reimbursement for the years of 2006

through 2011 that did not take issue with Medica’s inclusion of carrier-paid claims. AR 234

(Stipulated Facts). However, in June 2016 CMS informed Medica that “statistics associated with

[carrier-paid] claims should not be included in your apportionment statistic.” Id.. Following these

discussions, a CMS-contracted auditor recalculated Medica’s reimbursement for the 2006–2011

cost reports, reducing the figure by about $6.3 million. AR 1850. To be clear, the dispute

concerned whether charges for carrier-paid claims could be included in the apportionment ratio,

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not whether the costs of payments for these claims may be included among the total costs that are

multiplied by that ratio. See Pl. Reply, ECF No. 25, at 4; AR 16–18.

       Medica claims—and the Secretary disputes—that “CMS eventually agreed with Medica’s

method for accounting for such claims that were recouped in a year subsequent to when they were

paid” because “[f]or those claims, CMS agreed that Medica could return the recouped amounts to

CMS on the cost report and include the physician charges associated with the carrier-paid claims

in the apportionment ratio.” Pl. MSJ at 11 (citing AR 129, 475–76).            Medica bases this

characterization on an email from a CMS employee telling CMS: “For duplicate claims (claims

processed by both the MAC and Medica) that are determined outside of a cost reporting year, those

prior year claims can be refunded to CMS through an adjustment on [Worksheet] M.” AR 475.

The government argues that CMS merely instructed Medica to credit back its duplicate payment

and points out that the email said nothing about including carrier-paid claims in the apportionment

calculation. Gov. MSJ at 26–27. The Secretary further argues that the email reflects a decision

made by a CMS employee, not official CMS policy. Gov. Reply, ECF No. 36, at 21–22. At any

rate, the parties certainly did not agree on what to do with claims paid by a MAC and processed

by Medica in the same year. See, e.g., AR 1493. CMS concluded that Medica had improperly

included the MAC-incurred charges in its cost reports. In May 2019 CMS revised its Notices of

Program Reimbursement for the years of 2006 through 2011 to reflect the lesser sum. AR 1473.

       Medica timely appealed. AR 1472. Medica prevailed in the initial administrative hearing

before the CMS hearing officer, who held that by removing charges for carrier-paid claims from

the apportionment calculation, CMS violated the plain meaning of 42 C.F.R. § 417.560(c). AR 83.

However, the CMS Administrator chose to review the decision and in March of 2022 reversed the

ruling of the hearing officer. See AR 21, 60. The Administrator reasoned that Medica’s costs

                                                10
associated with carrier-paid claims were not costs “actually incurred and necessary in the efficient

delivery of patient care services,” and so were ineligible for reimbursement. AR 19. “[T]he

charges used in the apportionment statistics,” she wrote, “must be related to the costs incurred for

services furnished under arrangements and paid for by the HMO.” AR 14. Medica then filed the

present lawsuit. See Compl., ECF No. 1.

   D. Motions Presently Before the Court

       Before the Court are two motions.

       First, Medica has moved for summary judgment. Pl. MSJ. Second, the Secretary opposes

plaintiff’s motion and has cross-moved for summary judgment. Gov. MSJ. Medica has filed a

memorandum in opposition to the Secretary’s motion and in reply to the Secretary’s opposition.

Pl. Reply. And the Secretary has filed a reply in support of his cross-motion. Gov. Reply.

   These motions are ripe for review.

                                 II.    LEGAL STANDARDS

   A. Summary Judgment in the APA Context

       Ordinarily, summary judgment is governed by Federal Rule of Civil Procedure 56. See

Fed. R. Civ. P. 56(a). However, Medica has filed suit under the Administrative Procedure Act

(APA). Compl. ¶¶ 78–82; see also 5 U.S.C. § 706. And “[i]n cases involving review of a final

agency action under the APA . . . Rule 56’s standard does not govern.” Truitt v. Kendall, 554 F.

Supp. 3d 167, 174 (D.D.C. 2021) (citing Sierra Club v. Mainella, 459 F. Supp. 2d 76, 89–90

(D.D.C. 2006)). The difference flows from the APA’s allocation of authority between the agency

and the district court. Under the APA, resolving factual issues and reaching a decision supported

by the administrative record is the role of the agency, not the court. Truitt, 554 F. Supp. 3d at 174.

When a district court considers a summary judgment motion on an APA claim, its duty is to

“determine as a matter of law whether the agency’s decision was arbitrary, capricious, an abuse

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of discretion, or unlawful.” Truitt, 554 F. Supp. 3d at 174 (citing Sierra Club, 459 F. Supp. 2d at

89–90); see also 5 U.S.C. § 706 (setting out the duties of a court reviewing an APA claim). This

means “the district court sits as an ‘appellate tribunal’ and must answer . . . legal questions based

on the evidence in the administrative record.” Truitt, 554 F. Supp. 3d. at 174 (quoting Am.

Bioscience, Inc. v. Thompson, 269 F.3d 1077, 1083 (D.C. Cir. 2001)).

   B. Judicial Review Under the APA

       Medica challenges CMS’s action as inconsistent with the agency’s own regulation,

contrary to the Medicare statute, arbitrary and capricious, and violative of fair notice and due

process. Pl. MSJ at 2–3. Under the APA, the reviewing court must “hold unlawful and set aside

agency action, findings, and conclusions” that are, among other defects, “arbitrary, capricious, an

abuse of discretion, or otherwise not in accordance with law;” unconstitutional; “in excess of

statutory jurisdiction, authority, or limitations, or short of statutory right;” or “without observance

of procedure required by law.” 5 U.S.C. 706(2). The arbitrary and capriciousness standard is

“very deferential.” Shawal, Inc. v. Lynch, No. 14-cv-01512 (RCL), 2015 WL 7761053, at *3

(D.D.C. 2015). In judging whether an agency action is arbitrary and capricious, the reviewing

court may not substitute its judgment for that of the agency. Motor Vehicle Mfrs. Ass’n of U.S.,

Inc. v. State Farm Mut. Auto. Ins. Co., 463 U.S. 29, 43 (1983). Rather, the agency action will

stand so long as the agency “examine[d] the relevant data and articulate[d] a satisfactory

explanation for its action including a ‘rational connection between the facts found and the choice

made.’” Id. (quoting Burlington Truck Lines v. United States, 371 U.S. 156, 168 (1962)).

       In general, agency action is arbitrary and capricious “if the agency has relied on factors

which Congress has not intended it to consider, entirely failed to consider an important aspect of

the problem, offered an explanation for its decision that runs counter to the evidence before the

                                                  12
agency, or is so implausible that it could not be ascribed to a difference in view or the product of

agency expertise.” State Farm, 463 U.S. at 43. When an agency changes its position, “the

requirement that an agency provide reasoned explanation for its action would ordinarily demand

that it display awareness that it is changing position” and so “[a]n agency may not, for example,

depart from a prior policy sub silentio or simply disregard rules that are still on the books.” F.C.C.

v. Fox Television Stations, Inc., 556 U.S. 502, 515 (2009). This is so even when an agency departs

from past practice rather than past policy. See Am. Wild Horse Pres. Campaign v. Perdue, 873

F.3d 914, 927 (D.C. Cir. 2017).

        When evaluating an agency’s adherence to its own regulations, a court must consider

whether the agency’s interpretation merits Auer deference. See Auer v. Robbins, 519 U.S. 452

(1997). “Courts defer to an agency’s interpretation of its own regulation if the regulation in

question is ‘genuinely ambiguous’ and if the agency’s reading is reasonable.” Doe v. Sec. & Exch.

Comm’n, 28 F.4th 1306, 1311 (D.C. Cir. 2022) (quoting Kisor v. Wilkie, 139 S. Ct. 2400, 2414

(2019)). Auer deference is only appropriate only when “the character and context of the agency

interpretation entitles it to controlling weight” because the interpretation is the agency’s

“‘authoritative’” or ‘official position,’” “implicate[s]” the agency’s “substantive expertise,” and

“reflect[s] fair and considered judgment.” Kisor, 139 S. Ct. at 2416–18. A court will not “defer

to a new interpretation . . . that creates ‘unfair surprise’ to regulated parties,” especially when “an

agency substitutes one view of a rule for another.” Kisor, 139 S. Ct. at 2418 (quoting Long Island

Care at Home, Ltd. v. Coke, 551 U.S. 158, 170 (2007)). When an interpretation does not merit

Auer deference, “courts should not give deference to an agency’s reading, except to the extent it

has the ‘power to persuade.’” Kisor, 139 S. Ct. at 2414 (quoting Christopher v. SmithKline

                                                  13
Beecham Corp., 567 U.S. 142, 159 (2012)); see also Skidmore v. Swift & Co., 323 U.S. 134, 140

(1944).

                                     III.    DISCUSSION

   A. The Administrator Misinterpreted the Governing Regulation

          Medica has the best reading of the Cost Apportionment Regulation, 42 C.F.R.

§ 417.560(c). The text of the Regulation, read in context, clearly permits carrier-paid claims to be

included in the apportionment ratio. Even if the Court found the Regulation ambiguous—which

it does not—it would not accord Auer deference to CMS’s interpretation and would reject the

agency’s reading of the statute. An agency is bound by its own regulations, correctly understood.

See Reuters Ltd. v. F.C.C., 781 F.2d 946, 950 (D.C. Cir. 1986) (observing that “it is elementary

that an agency must adhere to its own rules and regulations.”). Because the Administrator misread

the Regulation, the Court holds that the CMS’s decision was “not in accordance with law,” 5

U.S.C. § 706(2)(A), and must be set aside.

          1. The Regulation Unambiguously Accords with Medica’s Interpretation

          For the reasons that follow, the governing regulation is unambiguous, and so not entitled

to Auer deference. The best reading of the regulation’s text, taking into account the larger context,

is that carrier-paid claims may be included in the apportionment calculation.

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               (i) The Text’s Plain Meaning Is That Carrier-Paid Claims May Be Included

       The plain meaning of the Cost Apportionment Regulation is that all “charges for covered

services furnished to Medicare enrollees,” including those associated with carrier-paid claims, may

be included in the apportionment ratio.

       The crux of the dispute between the parties is the meaning of the Regulation, 42 C.F.R.

§ 417.560(c). That provides the formula for calculating Medica’s reimbursable “costs actually

incurred,” 42 U.S.C. § 1395x(v)(1)(A). It reads:

       The Medicare share of the cost of Part B physician and supplier services furnished
       to Medicare enrollees under arrangements, and paid for by the HMO . . . is
       determined by multiplying the total amount for all such services by the ratio of
       charges for covered services furnished to Medicare enrollees to the total charges
       for all such services.

42 C.F.R. § 417.560(c). On its face, the Regulation thus obliges CMS to include “charges for

covered services furnished to Medicare enrollees” in the numerator and the denominator of the

apportionment ratio. And the parties have stipulated that the carrier-paid claims “were for covered

services furnished to Medicare enrollees in Medica’s cost plan.” AR 233 (Stipulated Facts).

       Medica argues that the “plain language” of the Regulation requires CMS to count the

carrier-paid claims in the ratio. Pl. MSJ at 15. Medica’s view has a syllogistic logic. Major

premise: “charges for covered services” must be included in the numerator and denominator.

Minor premise: the carrier-paid claims were for covered services. Conclusion: the carrier-paid

claims must be included in the numerator and denominator. However, Medica’s view depends on

another premise: that the Regulation requires all “charges for covered services” to be included—

regardless of whether the HMO or a MAC incurred the cost for the service. Is this premise valid?

If so, Medica’s conclusion is inescapable. If not, its argument fails.

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         Medica points out that the Regulation does not qualify the phrase in any way. Pl. MSJ

at 15. If read literally, the Regulation does require the inclusion of all “charges for covered

services.” The Secretary urges the Court to read the text in context, by which he means considering

the Regulation’s “overarching purpose, surrounding language, the statute it implements, and

neighboring regulations” as well as the results of Medica’s reading in “produc[ing] absurd

consequences, and require[ing] Medica to engage routinely in transactions that serve no bona fide

economic purpose but to prevent Medica from unlawful double-dipping.” Gov. MSJ at 10.

         The Court is mindful that, as Justice Barrett recently put it, fidelity to the text requires

situating “text in context.” Biden v. Nebraska, 143 S. Ct. 2355, 2378 (2023) (Barrett, J.,

concurring); see also Antonin Scalia & Bryan A. Garner, Reading Law: The Interpretation of

Legal Texts 63 (2012) (observing that “interpretation always depends on context”). “Context is

not found exclusively ‘within the four corners’ of a statute.” Nebraska, 143 S. Ct. at 2378 (Barrett,

J., concurring) (quoting John F. Manning, The Absurdity Doctrine, 116 Harv. L. Rev. 2387, 2457

(2003) (cleaned up)). It also includes “[b]ackground legal conventions” and “common sense.” Id.

And it involves the “evident purpose of what a text seeks to achieve.” Scalia & Garner, supra,

at 20.

         But of course a Court must start with the text itself. Section 417.560(c) is best understood

if disassembled into its components:

               The Medicare share of the cost of Part B physician and supplier services
                furnished to Medicare enrollees under arrangements, and paid for by the
                HMO . . .
               is determined by multiplying the total amount for all such services by
               the ratio of
                    o charges for covered services furnished to Medicare enrollees to
                    o the total charges for all such services.

                                                 16
         The Regulation twice refers to “such services.” The first reference to “such services”—

defining the base figure—evidently refers back to “physician and supplier services furnished to

Medicare enrollees under arrangements, and paid for by the HMO” because “such” is another way

of saying “[t]hat or those; having just been mentioned.” Black’s Law Dictionary 1661 (10th ed.

2014). The Secretary contends that the second reference to “such services”—defining the

denominator of the apportionment ratio—refers to the same phrase. Gov. MSJ at 12. As the

numerator goes, so goes the denominator, as “both semantics and statistics suggest that the term

‘covered services’ in the ratio’s numerator means the same thing as the term ‘such services’ in the

ratio’s denominator.” Id. The Secretary thus reads the Regulation to limit the numerator and

denominator of the apportionment ratio to supplier services “paid for by the HMO.”

         Recently, another court in this district addressed the issue of whether carrier-paid claims

could be included in the apportionment ratio. See Scott & White Health Plan v. Becerra, No. 22-

cv-3202 (CRC), 2023 WL 6121904 (D.D.C. 2023).3 Like the Secretary, the court in Scott & White

read the first mention of “such services” to refer to “physician and supplier services furnished to

Medicare enrollees under arrangements, and paid for by the HMO.” Scott & White, 2023 WL

6121904, at *7. However, it interpreted the second reference to “such services” to refer to

“covered services furnished to Medicare enrollees.” Scott & White’s reading is persuasive. The

Secretary cites Miss. ex rel. Hood v. AU Optronics Corp., in which the Supreme Court observed

that the “‘presumption that a given term is used to mean the same thing throughout a statute’ is ‘at

its most vigorous when a term is repeated within a given sentence.’” 571 U.S. 161, 171 (2014)

(quoting Brown v. Gardner, 513 U.S. 115, 118 (1994)). But while the presumption may be that a

3
  An additional court in this district also heard a case centered on this issue, but it did not reach the merits in either of
its opinions. See Rocky Mountain Health Maint. Org., Inc. v. Price, 297 F. Supp. 3d 152, 157–58 (D.D.C. 2018)
(Rocky Mountain I); Rocky Mountain Health Maint. Org., Inc. v. Azar, 384 F. Supp. 3d 80, 83 (D.D.C. 2019) (Rocky
Mountain II).

                                                            17
single term within a single sentence has a single meaning, here that presumption is defeated by a

clear signal from the text.

       As Scott & White noticed, there is a “meaningful variation” between the first and second

references to services. Scott & White, 2023 WL 6121904, at *7. The regulation first mentions

“physician and supplier services furnished to Medicare enrollees under arrangements, and paid

for by the HMO.” 42 C.F.R. § 417.560(c) (emphasis added). The next reference, in defining the

numerator, retains the “furnished” requirement but drops the “paid for” requirement. Scott &

White, 2023 WL 6121904, at *7. The denominator is then defined as the “total charges for all such

services,” which is mostly obviously read to refer to the immediately preceding mention of

services, because under the “last-antecedent” canon, “the correct antecedent is usually ‘the nearest

reasonable’ one.” Boechler, P.C. v. Comm’r of Internal Revenue, 142 S. Ct. 1493, 1498 (2022)

(quoting Scalia & Garner, supra, at 144). The omission of “paid for by the HMO” “indicates

that—unlike the base figure that only includes costs borne by the HMO—this ratio includes all

charges for furnished services, regardless of which entity picked up the tab.” Scott & White, 2023

WL 6121904, at *7.

       The Secretary’s approach, that the numerator and denominator are defined with reference

to services paid for by the HMO, is untenable. It is unreasonable to assume that the Regulation’s

drafters meant nothing by attaching the “paid for” requirement to the first reference to “services”

and dropping it for the next one. Cf. Russello v. United States, 464 U.S. 16, 23 (1983) (“[W]here

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.”) (quoting United States v. Wong Kim Bo, 472 F.2d 720, 722 (5th

Cir. 1972)). This Court thus joins the CMS hearing officer, Medica, and the Scott & White court

                                                18
in concluding that the Regulation’s plain meaning is that carrier-covered claims are to be included

in the apportionment ratio. As the hearing officer found, the “plainest reading” of the Regulation

is that the ratio includes carrier-paid claims. See AR 68.

               (ii) The Context Does Not Change the Text’s Plain Meaning

       Although context may defeat the literal reading of a text, see Nebraska, 143 S. Ct. at 2379

(Barrett, J., concurring), it does not do so in this case. To begin with, a key piece of context

supports Medica’s reading. The Regulation uses the term “costs” for the base figure and “charges”

for the apportionment ratio. Scott & White, 2023 WL 6121904, at *8. “Costs” and “charges” are

distinct concepts. As Scott & White noted, Medicare “regulations generally use ‘costs’ when

discussing the amount an entity pays out of pocket to deliver a service.” Scott & White, 2023 WL

6121904, at *8 (citing 42 C.F.R. § 417.556(a)). But “the word ‘charges’ is defined as the ‘regular

rates for various services that are charged to both beneficiaries and other paying patients who

receive the services.’” Scott & White, 2023 WL 6121904, at *8 (citing 42 C.F.R. § 413.53(b)).

Section 417.560(c) provides that the base figure is calculated based on “costs” that were “paid for

by the HMO,” so here it certainly matters whether a service was paid for the HMO or the MAC.

By contrast, the apportionment ratio is measured based on the charge from the physician, rather

than the cost to the HMO. “These charges, which are determined by fixed rates per service, are

not tied to the Plan’s out-of-pocket expenses and, accordingly, do not turn on who ‘paid for’ the

service.” Scott & White, 2023 WL 6121904, at *8.

       None of the Secretary’s contextual arguments can rescue him from the Regulation’s text.

These arguments will be taken, and rejected, in turn. First, the Secretary contends that the

Medicare Act reinforces his argument that carrier-paid claims must be excluded from the

apportionment ratio. It is true that “a regulation must be interpreted so as to harmonize with and

                                                19
further and not to conflict with the objective of the statute it implements.” Sec’y of Lab., Mine

Safety & Health Admin. v. W. Fuels-Utah, Inc., 900 F.2d 318, 320 (D.C. Cir. 1990) (cleaned up).

The Court, then, “must construe regulations in light of the statutes they implement, keeping in

mind that where there is an interpretation of an ambiguous regulation which is reasonable and

consistent with the statute, that interpretation is to be preferred.” Id. But the Secretary’s argument

from the Medicare Statute begs the question by assuming the truth of its own conclusion. The

Secretary cites the provision that “[t]he reasonable cost of any services shall be the cost actually

incurred, excluding therefrom any part of incurred cost found to be unnecessary in the efficient

delivery of needed health services.” 42 U.S.C. § 1395x(v)(1)(A). Surely, says the Secretary,

claims paid by the MAC rather than Medica are not “actually incurred” by Medica and thus not

part of the “reasonable cost.” Gov. MSJ at 13.

       But whether costs are “actually incurred” and “reasonable” is to be “be determined in

accordance with regulations establishing the method or methods to be used, and the items to be

included.” Id. § 1395x(v)(1)(A). In other words, they are to be determined by 42 C.F.R.

§ 417.560(c), the regulation whose interpretation is the subject of this case.          Whether the

Regulation permits inclusion of carrier-paid claims in the apportionment ratio depends on the

interpretation of the Regulation itself. The Secretary is basically asserting that the apportionment

ratio does not include carrier-paid claims because the figure defined solely through that ratio does

not include carrier-paid claims. That is like saying we know cigarettes cause cancer because

cigarettes are carcinogenic. The Secretary’s assumption of the conclusion he is seeking to prove

is not context that can challenge the plain meaning of the text.

       The Secretary also argues that Medica’s position conflicts with the Medicare Act’s

prohibition on cross-subsidization. This ban “prohibits shifting costs of Medicare services onto

                                                 20
non-Medicare patients” and “shifting costs from non-Medicare services onto the Medicare

program.”    New LifeCare Hosps. of N. Carolina, LLC v. Becerra, 7 F.4th 1215, 1225

(D.C. Cir. 2021) (citing 42 U.S.C. § 1395x(v)(1)(A)).        The Secretary argues that permitting

Medica to count carrier-paid claims in the apportionment ratio would grant it a windfall of

Medicare funds with which to subsidize the costs of its non-Medicare operations. Gov. MSJ at 14–

15; Gov. Reply at 6–7. But the purpose of the ratio is to construct “a proxy for Medicare’s share

of an HMO’s allowable costs,” which include “an HMO’s administrative and general costs . . . not

readily attributable to a specific service that a specific supplier renders to a specific beneficiary.”

Gov. MSJ at 5. Therefore, “[i]ncluding carrier-paid claims within this ratio makes sense because

doing so allows the Plan to recoup its indirect costs that support the provision of services provided

to Medicare enrollees.” Scott & White, 2023 WL 6121904, at *9; see also AR 127. Counting

carrier-paid claims in the ratio does not present such a risk of cross-subsidization that the

Regulation must be contorted to avoid it. None of the Secretary’s arguments based on the

Medicare Statute lead the Court to hesitate from embracing the Regulation’s plain meaning.

       Next, the Secretary cites five other Medicare regulations, arguing that these “neighboring

regulations in particular indicate that the Medicare program calculates reimbursement based only

on costs an HMO actually incurs.” Gov. MSJ at 15. The Secretary invokes the in pari materia

canon, according to which statutory provisions on the same subject are “construed together to

discern their meaning.”     Motion Picture Ass’n of Am., Inc. v. F.C.C., 309 F.3d 796, 801

(D.C. Cir. 2002). The Secretary, however, misapplies this canon. First, the canon typically

concerns the interpretation of statutes, not regulations. See, e.g., Wachovia Bank v. Schmidt, 546

U.S. 303, 305 (2006) (“[U]nder the in pari materia canon, statutes addressing the same subject

matter generally should be read ‘as if they were one law.’”) (quoting Erlenbaugh v. United States,

                                                  21
409 U.S. 239, 243 (1972)); Scalia & Garner, supra, at 252 (“Statutes in pari materia are to be

interpreted together, as though they were one law.”).

       But even if this doctrine applies equally to regulations, the argument fails. It would be one

thing if the Secretary were arguing for a particular term of art in the Regulation to be interpreted

as having the same meaning as in other provisions. See Helix Energy Sols. Grp., Inc. v. Hewitt,

598 U.S. 39, 53 (2023) (noting that the Court’s “reading of [a term in a regulation] also tracks how

neighboring regulations use the term”).       But instead, the Secretary invokes five Medicare

regulations that do not use the phrase “charges for covered services” and do not address the

apportionment ratio for supplier services. The Secretary asks the Court to ignore the Regulation’s

plain meaning simply because that would make it operate more similarly to different regulations,

doing different things, for different purposes. But the principle of in pari materia does not apply

“where the statutes, though relating to the same subject matter, have significantly different

purposes.” United Shoe Workers of Am., AFL-CIO v. Bedell, 506 F.2d 174, 188 (D.C. Cir. 1974).

The Secretary may refashion the Regulation to resemble other regulations, but the Court cannot.

        The Secretary’s final contextual arguments stem from the purported consequences of

Medica’s interpretation of the Regulation.        First, the Secretary contends that “Medica’s

interpretation of Section 417.560(c), carried to its logical conclusion, also yields absurd results.”

Gov. MSJ at 17. Specifically, the Secretary says that if the textually unqualified “charges for

covered services” is read to include all such charges even if not incurred by the HMO, then one

could also read the similarly unqualified “Medicare enrollees” to include those not actually

enrolled by the HMO. Gov. MSJ at 17. The absurdity doctrine holds that “judges may deviate

from even the clearest statutory text when a given application would otherwise produce ‘absurd’

results.” Manning, supra, at 2388. But here the Secretary is not arguing that the application in

                                                 22
this case—inclusion of carrier-paid claims in the apportionment—would itself be absurd. Nor

could he, since CMS’s own in-house hearing officer endorsed this position, AR 67–83, as has a

court in this district, Scott & White, 2023 WL 6121904. The Secretary is arguing instead that

Medica’s logic, when applied to a different part of the Regulation, would yield absurd results. But

that is to conflate the absurdity doctrine, so rarely applied by courts, with the “slippery slope”

cliché, so often invoked by lawyers. Because Medica’s interpretation would not itself produce

absurd results, the absurdity doctrine does not apply.

       In a similar vein, the Secretary contends that Medica’s interpretation “is unsound [in] that

it requires Medica routinely to engage in transactions that serve no bona fide economic purpose

simply to avoid breaking the law.” Gov. MSJ at 17–18. By this, the Secretary has in mind Medica

claiming reimbursement for the charge while, to avoid double-dipping, purporting to return to the

MAC the sum Medica would have paid the supplier but for MAC doing so first. Gov. MSJ at 18.

The Secretary also questions why Medica should be able to include carrier-paid claims in its

apportionment calculation when “[a]s a matter of financial reality, Medica does not incur the

charge the MAC paid.” Gov. MSJ at 1–2. Yet whatever qualms the Secretary has about this

practice, he does not go so far as to label it is an absurd result. There is no “unsound result”

doctrine that would let a court rewrite regulations. The absurdity doctrine “‘does not license courts

to improve statutes (or rules) substantively, so that their outcomes accord more closely’ with ‘what

we might think is the preferred result.” Yellen v. Confederated Tribes of Chehalis Rsrv., 141 S.

Ct. 2434, 2460 n.3 (2021) (Gorsuch, J., dissenting) (quoting Jaskolski v. Daniels, 427 F.3d 456,

461 (7th Cir. 2005) (Easterbrook, J.) (cleaned up)).         The Secretary’s warnings about the

consequences of Medica’s position therefore do not provide good reasons to ignore the words

chosen by the Regulation’s drafters.

                                                 23
         Text must be read in context. But that does not mean text may be subordinated to

extraneous considerations. The Court holds that the Regulation is unambiguous and permits

Medica to include the carrier-paid claims in the numerator and denominator of the apportionment

ratio.

                (iii) Since the Regulation Is Unambiguous, Auer Deference Is Not Merited

         For the reasons discussed above, the Regulation is not “genuinely ambiguous,” and

therefore CMS’s interpretation does not merit Auer deference. See Kisor, 139 S. Ct. at 2414.

Instead, the Court will defer to CMS’s reading only “to the extent it has the ‘power to persuade.’”

Kisor, 139 S. Ct. at 2414 (quoting Christopher, 567 U.S. at 159). But the Secretary’s reading is

unpersuasive and deserves no deference. The best reading of the Regulation is that carrier-paid

claims may be included in the apportionment calculation, and the Court adopts that interpretation.

         2. Even if the Regulation Were Ambiguous, the Court Would Not Accord Auer

            Deference to the Administrator’s Interpretation

         As the Court finds the Regulation is not “genuinely ambiguous,” Auer deference does not

apply. But even if the Court did find the Regulation ambiguous, it would not accord CMS’s

interpretation Auer deference and would still find that Medica had the best reading of the text.

         The Administrator’s conclusion that the apportionment ratio must exclude carrier-paid

claims was “a new interpretation . . . that creates ‘unfair surprise’ to regulated parties.” Kisor, 139

S. Ct. at 2418 (quoting Long Island Care, 551 U.S. at 170). Anyone who read the Regulation

would most naturally conclude that because the Regulation does not qualify “charges for covered

services” and does not repeat the “paid for” requirement, it includes all such charges, including

those for carrier-paid claims. Nor would one have received any clear contrary indication from the

agency, at least at the time Medica was preparing its 2006–2011 cost reports. As the hearing

                                                  24
officer observed, “[f]or the FYEs 2006-2011 cost reporting periods at issue here, there is no

additional sub-regulatory guidance which further refines how to calculate the apportionment ratio

in the specialized situation where a MAC also pays a Medicare enrollee’s claim despite the cost

plan’s legal arrangement to do so.” AR 68. Also, CMS did not object to Medica including carrier-

paid claims in its apportionment formula when it issued Notices of Program Reimbursement for

Medica’s 2006-2008 and 2009-2011 cost reports in 2013 and 2015, respectively. AR 234. Medica

cannot be blamed for relying on the uncontradicted best reading of the Regulation. So as the court

found in Scott & White, CMS’s decision to retroactively apply a different interpretation of the

Regulation “risks the sort of ‘unfair surprise to regulated parties’ the Supreme Court has counseled

against.” Scott & White, 2023 WL 6121904, at *12 (quoting Kisor, 139 S. Ct. at 2418).

   B. The Administrator’s New Interpretation of the Governing Regulation Effectively

       Amended CMS’s Regulations, and Thus Violated the Medicare Statute

       There is another reason the Administrator’s decision was “not in accordance with law.” 5

U.S.C. § 706(2)(A). By grafting on an extra requirement, the agency effectively amended the Cost

Apportionment Regulation without engaging in the notice-and-comment rulemaking required by

the Medicare Statute. The Administrator’s decision therefore violated this statute.

        Under the plain language of 42 C.F.R. § 417.560(c), Medica was permitted to include

carrier-paid claims in calculating its apportionment ratio. Medica argues that the Secretary

violated the Medicare Act by attempting to ban inclusion of such charges without engaging in

notice-and-comment rulemaking. As a policy matter, the Secretary takes serious issue with

including carrier-paid claims in the apportionment ratio. See, e.g., Gov. MSJ 17–19. The Secretary

is free to act on those concerns—by going through the process prescribed by Congress in the

Medicare Act. Only through rulemaking may the Secretary adopt any “rule, requirement, or other

                                                25
statement of policy . . . that establishes or changes a substantive legal standard governing . . . the

payment for services.” 42 U.S.C. § 1395hh(a)(2). There is no exception for interpretive rules.

Azar v. Allina Health Servs., 139 S. Ct. 1804, 1814 (2019). When the Secretary engages in such

rulemaking, the government must provide public notice and a 60-day comment period. 42 U.S.C.

§ 1395hh(b)(1).

       The Secretary never undertook rulemaking to prohibit HMOs from including carrier-paid

claims in the apportionment ratio. Nor did CMS provide other public guidance on this issue: the

hearing officer found, and the Administrator did not dispute, that “the regulation and cost report

worksheet instruction does not expressly address whether paid claims are to be included in the

ratio.” AR 16. At most, CMS communicated its view to Medica informally, see AR 506, and then

through the Administrator’s ruling, AR 4–22. The Secretary denies that the Administrator’s

decision triggered the rulemaking requirement, however, because it “simply applie[d] her

longstanding interpretation of Section 417.560(c) to Medica’s cost reports for the years at issue.”

Gov. MSJ at 23. Yet the evidence for a longstanding ban on counting carrier-paid claims is

lacking. The best the Secretary can come up with is the Medicare Managed Care Manual. Since

before the enactment of the Medicare Act’s rulemaking provision, the Secretary contends, the

Manual has provided that an HMO must recoup its own overpayment, not that of the MAC. Gov.

MSJ at 23 (citing AR 21 n.15). But that does not mean that the HMO cannot include carrier-paid

claims in its apportionment ratio, and the Secretary conspicuously fails to cite any specific

evidence that CMS promulgated that view before the rulemaking requirement came into effect.

       The Secretary argues that “Medica cites no regulation or guidance document by the

Administrator directing or allowing HMOs to count charges for MAC-paid claims in their cost

reports.” Gov. Reply at 16. But that gets things backward. The Secretary must show the practice

                                                 26
was forbidden; Medica need not show it was affirmatively allowed. The Secretary asserts that

CMS’s years-long failure to object to Medica’s inclusion of such charges in its apportionment ratio

does not evidence a permissive policy but instead resulted from CMS’s simple ignorance of HMOs

including carrier-paid claims in their apportionment ratios. Gov. Reply at 16–17. This claim is

startling, as it would “confound if CMS had no awareness of a multi-decade practice that implicates

millions of dollars in revenue.” Scott & White, 2023 WL 6121904, at *11. But even if it were

true, it only would confirm that until recently CMS did not have a policy in place forbidding

inclusion of carrier-paid claims.

         When CMS did attempt to implement this policy, it failed to do so through the required

notice-and-comment procedure. “If the agency seeks to rework this apportionment formula, it

must revise the regulation through the Medicare Act's notice-and-comment process as specified in

42 U.S.C. § 1395hh(a)(2) and further detailed in” Allina Health Servs. v. Price, 863 F.3d 937 (D.C.

Cir. 2017), aff’d sub nom. Azar v. Allina Health Servs., 139 S. Ct. 1804 (2019). Scott & White,

2023 WL 6121904, at *12; accord Vista Hill Found., Inc. v. Heckler, 767 F.2d 556, 566 (9th Cir.

1985) (“[I]f it turns out that the disadvantages to the Medicare program of continuing to use the

present method of cost allocation outweigh the advantages or that the policies of the act are being

frustrated by the use of that method, we assume the Secretary will amend her regulations or be told

to do so by the Congress.”). Here, CMS violated the Medicare Statute by attempting to banish

carrier-paid claims from the apportionment ratio without notice-and-comment rulemaking. 4

4
  Medica also argues that excluding carrier-paid claims from the apportionment ratio would violate the Medicare Act’s
prohibition on cross-subsidization, discussed above, by resulting in Medica’s non-Medicare patients subsidizing some
of Medica’s operations relating to its Medicare patients. Pl. MSJ at 22–23. Resolving the issue of whether CMS has
authority to issue a rule excluding these charges is not necessary to decide this case, because CMS has not issued a
rule on the topic. And the parties have not addressed this argument at great length. See Pl. MSJ at 22–23; Pl. Reply
at 20-21; Gov. MSJ at 22. Rather than engage in dicta about the bounds of CMS’s authority should it decide to revise
the Regulation, the Court will stick to the case at hand and decline to reach this issue.

                                                         27
   C. The Administrator’s Decision Was Arbitrary and Capricious

       A final reason the Administrator’s decision must be set aside is because it was arbitrary

and capricious. The Court agrees with Medica that the decision was arbitrary and capricious

because it amounted to an unexplained change in position, although the Court rejects Medica’s

other arguments that the decision treated similar claims dissimilarly and lacked a logical basis.

See Pl. MSJ at 23–28.

       When an agency changes its existing policies or practices, it “must at least ‘display

awareness that it is changing position’ and ‘show that there are good reasons for the new policy.’”

Encino Motorcars, LLC v. Navarro, 579 U.S. 211, 221 (2016) (quoting Fox Television Stations,

556 U.S. at 51). This is so even when an agency departs from past practice rather than past policy.

See Am. Wild Horse Pres. Campaign, 873 F.3d at 927. Here, the Administrator’s decision

proceeded as if “merely appl[ying] Section 417.560(c) to reach a conclusion already inherent in

its terms.” Gov Reply at 20. There was no acknowledgment of a change in position. The Secretary

argues that “CMS’s prior failure to object to this practice does not mean that it had a policy of

allowing that practice, or estop it from enforcing Section 417.560(c) with respect to this practice

going forward.” Gov. MSJ at 24. While CMS may not have officially sanctioned HMOs including

carrier-paid claims in the apportionment ratio, it had a practice of raising no objections.

       CMS’s argument might well have force if CMS had a policy of excluding carrier-paid

claims from the apportionment ratio, but for a time had neglected to enforce this policy against

Medica. See, e.g., Millard Refrigerated Servs., Inc. v. Sec’y of Lab., 718 F.3d 892, 898 (D.C. Cir.

2013) (noting that “the mere failure to cite [petitioner] previously can hardly be enough to estop

later government enforcement”). Yet CMS’s lack of objection, combined with its failure to

institute a policy against these charges at the time Medica was including them in its cost reports,

                                                 28
means it was arbitrary and capricious for the Administrator to arrive at her position without

displaying awareness that she was engaging in a new approach.

        This is reason enough to conclude that the Administrator’s decision was arbitrary and

capricious. The Court finds Medica’s other arguments unconvincing. First, Medica asserts that

the Administrator’s position is arbitrary and capricious because it “treats similarly situated claims

differently.” Pl. MSJ at 25. This characterization does not withstand scrutiny. Medica contends

that CMS treats carrier-paid claims “entirely differently based upon the year in which it was

recouped.” Id. But this generalized assertion is based solely on a single email from a CMS

employee telling Medica that carrier-paid claims recouped after the year in which they were paid

could be refunded to CMS through an adjustment to Worksheet M. See AR 475–76. The email

did not mention including carrier-paid claims in the apportionment calculation. There is therefore

insufficient evidence of disparate treatment to prove the Administrator’s decision was arbitrary

and capricious.

       Second, the Court is not prepared to endorse Medica’s argument that the Administrator’s

decision was “fundamentally unsound” because there is “no logical basis” for excluding the

carrier-paid claims. See Pl. MSJ at 26. Medica is not just denying a “rational connection between

facts and judgment,” State Farm, 463 U.S. at 5, in the particular decision under review. Instead,

it seems to be arguing that CMS could never have a logical basis to exclude carrier-paid claims,

and therefore can never enact such a policy even if the process were otherwise in accordance with

law. Applying the “very deferential” arbitrary and capriciousness standard, Shawal, 2015 WL

7761053, at *3, the Court will not lightly find that an agency’s policy approach can never have a

logical basis. Despite the infirmities of the Secretary’s reading of the Regulation, the Court will

not go so far as to say that the government’s policy opposition to including carrier-paid claims, see

                                                 29