Opinion filed for the court by Circuit Judge HENDERSON.
The appellants, the Pharmaceutical Research and Manufacturers of America (PhRMA) and two non-profit organizations, the National Alliance for the Mentally Ill of Michigan (NAMI) and the National Urban Indian Coalition (NUIC) (referred to jointly as Non-Profits), 1 ap *819 peal the district court’s summary judgment rejecting their challenge to the “Michigan Best Practices Initiative” (Initiative), a low-cost state prescription drug coverage program' — -for beneficiaries of Medicaid and of two non-Medicaid state health programs — -which was designed by the State of Michigan and approved by the Secretary of the United States Department of Health and Human Services (Secretary, HHS). Under the Initiative, if a drug manufacturer does not sign each of two specified rebate agreements with Michigan — one to provide rebates for drugs the state purchases for Medicaid recipients and the other to provide identical rebates for drugs the state purchases for the two non-Medicaid state health programs — the drug will be covered under the programs subject to “prior authorization.” The appellants argue, as they did below, that the Initiative violates (1) the “formulary” 2 provision of the Medicaid outpatient drug payment statute, 42 U.S.C. § 1396r-8(d)(4), because it ex-eludes from its drug formulary those drugs for which prior authorization is required; (2) the general statutory mandate that Medicaid services be provided in a manner consistent with the best interests of the recipients, 42 U.S.C.A. § 1396a(a)(19); and (3) the Commerce Clause of the United States Constitution because it requires manufacturers to charge the same prices both within and without Michigan. Because the district court correctly rejected each of these arguments, we affirm the summary judgment. 3
I.
The Medicaid program, jointly funded by the federal government and the states, pays for medical services to low-income persons pursuant to state plans approved by the Secretary.
See
42 U.S.C. § 1396a(a)-(b). The statutory rebate provisions require that, in order for a state to receive Medicaid payments for a covered
*820
outpatient drug, the drug’s manufacturer must have entered into an agreement to rebate a specified portion of the drug’s price pursuant to a state plan approved by the Secretary. 42 U.S.C. § 1396r-8(a)(l). In recent years, some states have gone beyond the required Medicaid rebate agreement and “have enacted supplemental rebate programs to achieve additional cost savings on Medicaid purchases as well as for purchases made by other needy citizens.”
PhRMA v. Walsh,
The Initiative began in October 2001 when Michigan’s governor convened the Pharmacy & Therapeutics Committee (Committee), made up of physicians and pharmacists, with instructions to review the “Michigan Pharmaceutical Product List” (MPPL), a listing of all drugs covered by any program operated by Michigan’s Department of Community Health (DCH), including those requiring prior authorization. The Committee studied 40 therapeutic drug classes and in each class designated two or more as “Therapeutically Advantageous,” that is, as having a clinical advantage over other drugs in the class without regard to cost. Declaration of David Viele, Deputy Director of DCH (Viele Decl.) ¶¶ 15-17. These “best in class” drugs were designated as “Preferred Drugs” and were included on the MPPL for automatic reimbursement under the Initiative. The best-in-class drug available at the lowest cost anywhere in the United States (taking into account the mandatory Medicaid rebate) was designated as the “reference drug” and all drugs in the class priced comparably with it were also listed on the MPPL as Preferred Drugs for automatic reimbursement. Id. ¶ ¶ 20-21. All remaining drugs were labeled “non-preferred drugs” and were listed on the MPPL with an asterisk signifying required prior authorization for reimbursement — unless the manufacturer signed both a “Supplemental Drug-Rebate Agreement” (Medicaid Agreement) requiring the manufacturer to rebate to the state the difference between the price of the drug and the price of the reference drug for Medicaid purchases and a “Non-Medicaid State Funded Rebate Agreement” (Non-Medicaid Agreement), extending the additional rebate to Michigan’s non-Medicaid state prescription drug programs. Id. ¶ ¶ 22, 24-25, 29.
In Fall 2001 DCH submitted to the Secretary a proposed State Plan Amendment to Michigan’s State Medicaid Plan incorporating the Initiative’s provisions for approval pursuant to 42 U.S.C. § 1396. The Secretary approved use of the Medicaid Agreement in a letter dated January 24, 2002 and of the additional Non-Medicaid Agreement in a letter dated December 5, 2002 (Non-Medicaid Approval Letter). The Secretary limited approval of the non-Medicaid rebate program, however, to only two of the four Michigan health programs for which it was proposed: the Elder Prescription Insurance Company Program (EPIC), which provides prescription drug coverage to low-income seniors, and the Maternity Outpatient Medical Service (MOMS), which provides pre-natal care, including drug coverage, to low-income, adolescent and incarcerated females and to Medicaid beneficiaries eligible for emergency services only.
On June 28, 2002 PhRMA filed this action challenging the Secretary’s approval of the prior authorization provisions in both the Medicaid Agreement and the Non-Medicaid Agreement. DCH intervened on the side of the Secretary and the Non-Profits intervened in support of PhRMA. In a decision dated March 28, 2003 the district court granted summary judgment in favor of the Secretary and *821 DCH. PhRMA and the Non-Profits filed timely appeals.
After the district court entered judgment, the United States Supreme Court issued its decision in
PhRMA v. Walsh,
II.
We review the district court’s grant of summary judgment
de novo
pursuant to the Administrative Procedure Act and therefore will uphold the Secretary’s decision unless it is “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law,” 5 U.S.C. § 706(2)(A).
See Arizona v. Thompson,
The appellants contend that the Secretary’s decisions do not qualify for
Chevron
deference because they do not carry the force of law. In particular, the appellants assert the Secretary’s statutory interpretations here are not the result of a formal administrative process, do not involve agency expertise, are inconsistent with previous HHS interpretations and were developed solely in response to this lawsuit. Thus, the appellants argue, the Secretary’s interpretations are akin to “ ‘interpretations contained in policy statements, agency manuals, and enforcement guidelines,’ ” which are “beyond the
Chevron
pale.”
Mead,
A. The Statutory Formulary Provision
First, the appellants assert the Initiative’s prior authorization requirement violates section 1396r-8(d)(4), which governs formularies. We conclude the Secretary’s approval of the Initiative’s pri- or authorization requirement rests on a permissible construction of the statute under Chevron.
The Medicaid rebate provisions, enacted in 1990, expressly authorize a state “to subject to prior authorization any covered outpatient drug” so long as the state “provides response by telephone or other telecommunication device within 24 hours of a request for prior authorization” and “provides for the dispensing of at least 72-hour supply of a covered outpatient prescription drug in an emergency situation.” 42 U.S.C. § 1396r-8(d)(l)(A), (5(A)-(B)). 6 In *823 1993 the Congress added the formulary provision which authorizes a state to create a drug “formulary” of covered drugs that is “developed by a committee consisting of physicians, pharmacists, and other appropriate individuals appointed by the Governor of the State.” Id. § 1396r-8(d)(4)(A). The provision further directs that each formulary must “include[ ] the covered outpatient drugs of any manufacturer which has entered into and complies with a [rebate] agreement under [section 1396r-8(a) ]” and permits “[a] covered outpatient drug [to] be excluded with respect to the treatment of a specific disease or condition for an identified population (if any) only if ... the excluded drug does not have a significant, clinically meaningful therapeutic advantage in terms of safety, effectiveness, or clinical outcome of such treatment for such population over other drugs included in the formulary and there is a written explanation (available to the public) of the basis for the exclusion.” 42 U.S.C. § 1396r-8(d)(4)(B)-(C). In addition, the state is required to “permitf] coverage of a drug excluded from the for-mulary ... pursuant to a prior authorization program that is consistent with [section 1396r-8(d)(5) ].” Id. § 1396r-8(d)(4)(D).
The appellants contend that the Initiative’s prior authorization requirement violates the formulary provision because it excludes the asterisked drugs 7 from the MPPL based on their price rather than their therapeutic value and because the Secretary has not provided the requisite written explanation for the exclusion. The Secretary does not dispute that the MPPL is a formulary, see Fed. Appellees’ Br. at 28, but, relying on the Supreme Court’s opinion in Walsh, asserts that the Initiative’s prior authorization program was implemented pursuant to the general prior authorization authority conferred by section 1396r-8(d)(l)(A) and is expressly exempted from the formulary restrictions in section 1396r-8(d)(4)(B)-(C) by the final sentence of section 1396r-8(d)(4): “A prior authorization program established under [section 1396r-8(d)(5)] is not a formulary subject to the requirements of [section 1396r-8(d)(4)].” 8 The appellants respond that the Secretary’s construction permits a state to gut the restriction on formulary exclusion in section 1396r-8(d)(4)(C) by simply attaching the label “prior authorization program” to what is really a formu-lary drug exclusion. They point out that, under the Secretary’s interpretation, the formulary provision serves no purpose because its end result — drug availability restricted by prior authorization — can be more easily achieved, that is, without running the gauntlet of subsection 396r-8(d)(4)(C), if a state simply invokes prior authorization authority up front under section (d)(1)(A).
Under the
Chevron
framework, “[i]f ... ‘Congress has directly spoken to the precise question at issue,’ we must give effect to Congress’s ‘unambiguously expressed intent’ ” but “[i]f ‘the statute is silent or ambiguous with respect to the specific issue,’ we ask whether the agency’s position rests on a ‘permissible construction of the statute.’ ”
Beverly Health & Rehab. Servs. v. Nat’l Labor Relations Bd.,
We acknowledge that there is tension, if not actual inconsistency, between the broad prior authorization power granted under subsection (d)(1)(A), buttressed by the final exempting sentence of subsection (d)(4), and the apparent intent of the for-mulary provision to broaden drug availability. The appellants are correct that under the Secretary’s construction the for-mulary provision simply gives the states an alternate, and more cumbersome, means of subjecting drugs to prior authorization. Nonetheless, the tension is a necessary consequence of the language the Congress drafted. The Secretary’s construction permits all of the language to be given its plain meaning, albeit with a somewhat anomalous result. The appellants’ construction, on the other hand, would require a crabbed reading of subsection (d)(1)(A) and of the final sentence of subsection (d)(4) and yet would not produce a coherent statutory scheme. Given these choices — neither entirely satisfactory — we believe the Secretary reasonably chose an interpretation consistent with the literal meaning of the statutory language. We note the Eleventh Circuit approved the same construction in
PhRMA v. Meadows,
B. The Best Interests of Medicaid Recipients
Next, the appellants argue, as in Walsh, that the Medicaid Agreement violates the general statutory requirement that a state Medicaid plan “provide such safeguards as may be necessary to assure that eligibility for care and services under the plan will be determined, and such care and services will be provided, in a manner consistent with simplicity of administration and the best interests of the recipients.” 42 U.S.C.A. § 1396a(a)(19) (emphasis added). Specifically, they argue that, by making a drug available to Medicaid beneficiaries without prior authorization only if the drug’s manufacturer has signed the Non-Medicaid Agreement, the Initiative benefits EPIC and MOMS participants at the expense of Medicaid beneficiaries and therefore is not in the best interests of Medicaid recipients. We reject this argument as well.
We first consider whether the Secretary’s interpretation of section 1396a(a)(19) is permissible under
Chevron
and find that it is. The Secretary construes the best interests requirement to allow a state to establish a Medicaid prior
*825
authorization program in order to secure rebates on drugs for non-Medicaid populations if “a state demonstrates ‘through appropriate evidence that the prior authorization program will further the goals and objectives of the Medicaid program.’” Fed. Appellant’s Br. at 29 (quoting 9/18/2002 HHS Letter to State Medicaid Directors at 3). Specifically, the Secretary concluded that “by making prescription drags accessible to the EPIC and MOMS populations, which are closely related to Medicaid populations in terms of financial and medical need, it is reasonable to conclude that these populations (and in the case of the MOMS program, their children) will maintain or improve their health status and be less likely to become Medicaid eligible.” Non-Medicaid Approval Letter at 2. Conversely, in the Secretary’s view, the failure to implement the Non-Medicaid Agreement could require cuts in the two non-Medicaid programs that “will necessarily result in some individuals enrolling in Medicaid, and for others, lead to a decline in their health status and resources that will result in Medicaid eligibility or increased Medicaid expenses” and the “[i]ncreased Medicaid enrollments and expenditures for newly qualified Medicaid recipients will strain already scarce Medicaid resources in a time of State budgetary shortfalls.”
Id.
at 3. The Secretary’s conclusion that a prior authorization program that serves Medicaid goals in this way can be consistent with Medicaid recipients’ best interests, as required by section 1396a(a)(19), is reasonable on its face. If the prior authorization program prevents borderline populations in Non-Medicaid programs from being displaced into a state’s Medicaid program, more resources will be available for existing Medicaid beneficiaries. Six Justices in
Walsh
acknowledged that such an effect can be in the best interests of Medicaid beneficiaries.
10
The plurality decision there, authored by Justice Stevens and joined by Justices Souter and Ginsburg, relied on precisely this reasoning in determining that Maine’s program served the best interests of Medicaid recipients,
see
Having concluded the Secretary’s statutory interpretation is permissible, we must next consider whether his specific determination that the Initiative serves valid Medicaid goals is “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law,” 5 U.S.C. § 706(2)(A). We conclude that it is not. The two Michigan Non-Medicaid programs, unlike Maine’s program (or the two other Michigan programs for which the Secretary declined to approve a Medicaid prior authorization requirement,
see
Letter from Medicaid Administrator Scully to DCH Director Olszewski), are open only to “borderline” populations many of whom may become Medicaid beneficiaries without the support of EPIC and MOMS.
See Walsh,
The undisputed evidence establishes that the Initiative’s prior authorization procedure affords Medicaid beneficiaries reasonable and prompt access to those drugs subject to prior authorization. Under the Initiative, DCH’s pharmacy benefits manager immediately authorizes a pri- or authorization drug if (1) the drug is needed “due to a specific medical condition or necessity, such as a drug allergy”; (2) the beneficiary has used the drug for several months and changing drugs is “medically inadvisable”; (3) the beneficiary has tried available drugs in the class and experienced “treatment failure or side effects”; or (4) the drug works better in combination with other medications the beneficiary uses. Viele Decl. ¶ 46. If the drug fits none of these categories, the request is “immediately forwarded” to a pharmacist who “after further conversation with the physician” either authorizes the drug or “informs the physician of his right to appeal to a DCH physician.” Id. ¶ 47. If the request is not “immediately resolved with a DCH physician,” the treating physician may prescribe an emergency 72-hour supply. Id. ¶ 48. Perhaps most important, at the end of the prior authorization process, “the prescribing physician has the final say as to whether or not the request *827 ed drug will be approved” provided he can “attest to medical necessity.” Id. ¶49. And the available data confirm that in practice the prior authorization requirement has proved neither burdensome nor overly time-consuming. 12
C. Commerce Clause
Finally, PhRMA contends the Initiative violates the Commerce Clause because it “has the ‘practical effect’ of controlling out-of-state prices.” PhRMA Opening Br. at 54 (quoting
Healy v. Beer Inst.,
* * *
For the foregoing reasons the judgment of the district court is
Affirmed.
Notes
. The district court held that NAMI lacked standing to pursue this action.
. "Webster’s New Collegiate Dictionary (1994) defines a 'formulary' as 'a book listing medicinal substances and formulas.’ ”
PhRMA v. Meadows,
. Michigan argues that the appellants have no private right of action for injunctive relief against the state based on Justices Scalia's and Thomas's separate opinions in
PhRMA v. Walsh,
. Unlike Michigan's non-Medicaid programs, Maine’s was open to all state residents and the drugs were purchased by the program's members rather than by the state.
. Nonetheless, we note that, while "the overwhelming number of ... cases applying
Chevron
deference have reviewed the fruits of notice-and-comment rulemaking or formal adjudication,"
Chevron
deference may be warranted "even when no such administrative formality was required and none was afforded.”
Mead,
. The appellants do not dispute that the Initiative complies with the two statutory requirements. See Viele Decl. ¶ ¶ 47-48.
. As noted above, supra p. 820, drugs subject to prior authorization are marked with asterisks on the MPPL.
. The appellants assert that on appeal the Secretary relies on the Walsh decision to the exclusion of “any other defense.” PhRMA Reply Br. at 4 n.l; see also id. at 12. The Secretary's argument, as we read it, is that Walsh confirms his position below.
. The Eleventh Circuit, however, decided the issue
under step one
of
Chevron,
concluding that there is no inconsistency given the “unequivocal” language of section (d)(1)(A), granting broad prior authorization authority (expressly set out as an alternative to restricting coverage through a formulary), and of the final sentence of section (d)(4), exempting section (d)(1)(A) programs from the formulary restrictions.
PhRMA v. Meadows,
. These Justices did not invoke Chevron deference, presumably because the Secretary had not reviewed Maine's program and participated in the case only as amicus curiae.
. We note that our arbitrary-and-capricious standard favors the Secretary's finding of benefit, while in
Walsh
the preliminary injunction abuse-of-discretion standard, as Justice O’Connor noted, favored affirming the district court's granting of the injunction.
See
. In July 2002, for example, all but 19% of prior authorization requests placed with the program's call center were resolved in two to three minutes of conversation and only 2.2% were not approved at the pharmacist stage. Viele Decl. ¶51. Further, from February to July 2002 calls to the center averaged 2-3 minutes, discussions with pharmacists, when necessary, lasted 2-6 minutes, appeals to DCH physicians were resolved within 24 hours and facsimile requests were typically resolved within 24 hours. Id. ¶ 50.
