Vacated and remanded with instructions by published opinion. Judge TRAXLER wrote the majority opinion, in which Judge WILLIAMS joined. Judge GREGORY wrote a dissenting opinion.
OPINION
TRAXLER, Circuit Judge.Maryland General Hospital (“MGH”) appeals from the district court’s order upholding the decision of the Secretary of Health and Human Services to deny MGH a “new provider” exemption to the Medicare program’s caps on reimbursement for routine service costs. See 42 C.F.R. § 413.30(e) (1996).1 We vacate the district court’s order and remand with instructions for the court to enter judgment in favor of MGH.
I.
A.
Under the Medicare program, skilled nursing facilities (“SNFs”) are entitled to reimbursement from the federal government for the reasonable costs of providing services to Medicare patients. See 42 U.S.C.A. § 1395x(u), (v)(l)(A) (West Supp. 2002). There are, of course, numerous exceptions to and limitations on that reimbursement, including certain caps imposed on the reimbursement for routine service costs. See 42 U.S.C.A. § 1395yy(a) (West Supp.2002). Congress, however, has expressly authorized the Secretary to establish appropriate exemptions and adjustments to these limits on routine costs. See 42 U.S.C.A. § 1395yy(c) (West Supp.2002). One such exemption established by the Secretary is the exemption for new providers of skilled nursing services, which allows higher reimbursement rates for the first two years of operation. See 42 C.F.R. § 413.30(e). The new provider exemption thus “allow[s] a provider to recoup the higher costs normally resulting from low occupancy rates and start-up costs during the time it takes to build its patient population.” Paragon Health Network, Inc. v. Thompson, 251 F.3d 1141, 1149 (7th Cir.2001) (internal quotation marks omitted).
B.
The establishment and operation of skilled nursing facilities and other health care facilities in Maryland, as in most states, requires navigation through a complex maze of statutes and regulations. But for purposes of this case, it suffices to say that a “certificate of need” is required for the operation of a skilled nursing facility, and the certificate of need limits the number of beds that the facility may operate. Under certain circumstances, howev*343er, facilities in Maryland have the right to put as many as 10 additional beds into operation, without acquiring a new certificate of need. See Md.Code Ann., Health Gen. II § 19 — 120(f), (h)(1), (h)(2)® (Supp. 2001). These additional beds are generally referred to as “waiver beds.” See Brief of Appellant at 5, n. 3.
In 1994, MGH established the “Transitional Care Center,” a hospital-based skilled nursing facility. Prior to that time, MGH had not operated such a facility. To get the Transitional Care Center up and running, MGH purchased from three skilled nursing facilities the right to operate 24 beds. The facilities from which MGH purchased the bed rights were not connected or related to MGH in any way. The contracts between MGH and the selling facilities anticipated that the beds being sold to MGH would be “operational” beds — that is, beds that were in use by the selling facilities and authorized by their certificates of need. But when the Maryland Health Resources Planning Commission approved the transaction, it characterized the transaction as involving the transfer of waiver beds rather than operational beds.
MGH thereafter applied for the “new provider” exemption. After going through several layers of review within the Department of Health and Human Services, MGH’s request was denied. MGH then sought review of the Secretary’s decision by the district court. See 42 U.S.C.A. § 1395oo(f)(l) (West Supp.2002) (providing for judicial review of final reimbursement decisions by the Secretary). On cross-motions for summary judgment, the district court concluded that the Secretary’s decision was based upon a reasonable interpretation of section 413.30(e). The court therefore denied MGH’s motion and granted the Secretary’s motion. This appeal followed.
II.
A.
The Medicare Act specifies that judicial review of reimbursement decisions is to be governed by the familiar standards of the Administrative Procedure Act. See 42 U.S.C.A. § 1395oo(f)(l). Under the APA, a court must “hold unlawful and set aside agency action, findings, and conclusions found to be ... arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law.” 5 U.S.C.A. § 706(2)(A) (West 1996). When the question before the court is whether an agency has properly interpreted and applied its own regulation, the reviewing court must give the agency’s interpretation “substantial deference.” Thomas Jefferson Univ. v. Shalala, 512 U.S. 504, 512, 114 S.Ct. 2381, 129 L.Ed.2d 405 (1994). But “[d]ef-erence, of course, does not mean blind obedience,” Garvey v. NTSB, 190 F.3d 571, 580 (D.C.Cir.1999), and no deference is due if the agency’s interpretation “is plainly erroneous or inconsistent with the regulation,” Thomas Jefferson Univ., 512 U.S. at 512, 114 S.Ct. 2381 (internal quotation marks omitted).
B.
The new provider exemption is fairly straightforward. It provides that
[exemptions from the limits imposed under this section may be granted to a new provider. A new provider is a provider of inpatient services that has operated as the type of provider (or the equivalent) for which it is certified for Medicare, under present and previous ownership, for less than 3 full years....
42 C.F.R. § 413.30(e). Section 413.30(e) does not define “provider,” but the structure and wording of the regulation suggest that the provider is the business entity or *344institution providing the skilled nursing-services. This reading is consistent with the meaning attached to a similar term in another part of the Medicare Act. See 42 U.S.C.A. § 1395x(u) (defining “provider of services” as “a hospital, critical access hospital, skilled nursing facility, comprehensive outpatient rehabilitation facility, home health agency, [or] hospice program”). This business-entity-specific reading of the regulation is also supported by the explanation of the “new provider” exemption contained in the version of Medicare’s “Provider Reimbursement Manual” (“PRM”) in effect at the time MGH purchased the beds:
A new provider is an institution that has operated in the manner for which it is certified in the program (or the equivalent thereof) under present and previous ownership for less than 3 full years. For example, an institution that has been furnishing only custodial care to patients for 2 full years prior to its becoming certified as a hospital furnishing covered services to Medicare beneficiaries, shall be considered a “new provider” for 3 full years from the effective date of certification. However, if an institution had been furnishing hospital health care services for 2 full years prior to its certification, it shall only be considered a “new provider” in its third full year of operation, which is its first full year of participation in the program.
Although a complete change in the operation of the institution, as illustrated above, shall affect whether and how long a provider shall be considered a “new provider,” changes of the institution’s ownership or geographic location do not in [themselves] alter the type of health care furnished and shall not be considered in the determination of the length of operation.
PRM § 2604.1 (emphasis added). These repeated references to an “institution” indicate that application of the new provider exemption depends upon the ownership and operation of the business entity that is providing the skilled nursing services. There is no dispute that neither MGH nor any previous owner of MGH had provided inpatient skilled nursing services before the Transitional Care Center was established. Thus, it would appear that MGH meets the requirements for a “new provider” as set forth in 42 C.F.R. § 413.30(e).
The Secretary, however, insists that MGH is not a new provider because the “waiver beds” were previously owned by unrelated skilled nursing facilities that had been operating for more than three years. According to the Secretary, MGH’s Transitional Care Center
was created by purchasing the right to operate nursing home beds formerly held by three existing SNFs. Thus, a change of ownership of these 24 beds created [the Transitional Care Center], Under the Secretary’s rules, one must look to whether the past owner of these beds operated as a SNF for three or more years.... There is no dispute that each of the prior owners of these beds operated as an SNF for more than three years. Therefore, MGH does not qualify for an exemption to the cost limits.
Brief of Appellee at 26 (internal quotation marks omitted).
We find this argument to be rather remarkable. Section 413.30(e) quite plainly focuses on the “newness” of the provider institution itself, a reading with which the Secretary purports to agree. See Brief of Appellee at 25 (stating that when determining whether the new provider exemption is applicable, the Secretary “looks at the operation of the institution under both past and present ownership as required by the regulation” (emphasis added)). When *345applying the exemption in this case, however, the Secretary has not focused on the “newness” of the institution providing the services, but has instead focused on the “newness” of one particular asset of that institution. Such an approach could be sustained only if section 413.30(e) were ambiguous and the Secretary’s interpretation reasonable. See Martin v. Occupational Safety & Health Rev. Comm’n, 499 U.S. 144, 150-51, 111 S.Ct. 1171, 113 L.Ed.2d 117 (1991) (“In situations in which the meaning of regulatory language is not free from doubt, the reviewing court should give effect to the agency’s interpretation so long as it is reasonable.” (internal quotation marks and alteration omitted)).
The Secretary points to Paragon Health Network, Inc. v. Thompson, 251 F.3d 1141 (7th Cir.2001), in which the Seventh Circuit found the term “provider” as used in section 413.30(e) to be ambiguous. In that case, Paragon Health Network, Inc. opened a new skilled nursing facility and transferred the rights to operate 35 beds from another Paragon-owned skilled nursing facility. The Seventh Circuit concluded that “provider” was ambiguous as used in section 413.30(e) because it might sometimes be difficult to determine when certain internal changes to an institution would be enough to give rise to a “new provider”:
[I]f a facility fires all its staff and hires a new one, but makes no other changes, an ordinary user of the English language probably would consider the SNF with the new staff to be the same “provider” as it was before. Similarly, a SNF that replaced all of its old equipment with new models would still be the same “provider” as it was before the modernization. Even if a SNF both fired its staff and replaced all of its equipment, one might still call it the same “provider” if the administration and physical plant remained the same. Of course, if all the various things that make up a SNF were new in the sense that they had not been part of another facility, then one would have to call that SNF a “new provider.” Conversely, if a nursing facility did not change any of its aspects, it would unquestionably continue to be the same provider rather than a new one. The difficulty in drawing a fine between these two extremes is what makes the word “provider” ambiguous as used in the regulation.
Paragon, 251 F.3d at 1148. Because it found “provider” to be ambiguous, the court found reasonable the Secretary’s denial of the new provider exemption based on the transfer of the beds. See id. at 1148-50.
In our view, the court’s approach in Paragon is problematic. First, the fact that it might be difficult to draw a statutorily created line in a case with unusual facts does not mean that ordinary terms used in the statute suddenly become ambiguous. Moreover, as the district court observed in Ashtabula County Medical Center v. Thompson, 191 F.Supp.2d 884 (N.D.Ohio 2002), the difficulties that the Seventh Circuit believed its hypotheticals illustrated largely do not exist when “provider” is understood to mean the institution or facility providing the services:
Focusing on the nature of the word “provider,” the very series of hypotheti-cals posed by the Seventh Circuit leads to the conclusion that that term is unambiguous. The first three scenarios posited by the court are examples of one institution taking certain actions that fail to create any new institution, and the court sensibly concluded that these actions would not result in the creation of a “new provider”: “a facility” fires all its staff and hires a new one; “a SNF” replaces all of its old equipment; “a *346SNF” both fires all its staff and replaces its old equipment, but retains the same administration and physical plant. In each of these examples, some institution (“a facility” or “a SNF”) changes some — maybe even many — of its characteristics, but remains in existence as that same institution, without giving rise to any new institution. In the court’s final hypothetical, however, “all the various things that make up a SNF” are new, and the court rightly concluded that such a scenario would evidence the creation of a “new provider.” In this case, the Seventh Circuit described not just one facility that changes certain of its characteristics but ultimately remains the same institution; rather the court put forth a scenario involving a second, distinct entity where all the various things that make up a SNF are new. Perhaps the old institution is gone, and perhaps not, but that is of little consequence. The question is whether a second, new institution — a “new provider” — has come into existence, and in the court’s final hypothetical, one clearly has.
Ashtabula, 191 F.Supp.2d at 892 n. 8. Because the Seventh Circuit effectively found “provider” to be ambiguous by ignoring the ordinary meaning of that term, we find the court’s analysis to be unpersuasive.
Notwithstanding the absence of a definition of “provider,” we simply cannot conclude that section 413.30(e) is ambiguous. Given the ordinary meaning of the word “provider” and the manner in which it is used in the regulation, section 413.30(e) can only be understood as focusing on the business institution that is providing the skilled nursing services. If that institution, whether under its current or prior ownership, has operated as a skilled nursing facility for more than three years, then it is not entitled to the new provider exemption. If that institution under current or prior ownership has not previously operated as a skilled nursing facility, then it is entitled to the new provider exemption, even if the institution has purchased some of its assets from skilled nursing facilities that have operated for more than three years. See Ashtabula, 191 F.Supp.2d at 893 (concluding that “the term provider refers to the institution applying for the exemption ... not merely to its intangible characteristics or attributes” and holding that a newly created facility was entitled to the new provider exemption notwithstanding the institution’s purchase of certificate of need rights from an unrelated SNF). Because MGH under any ownership had not previously operated a skilled nursing facility when it applied for the exemption, we conclude that MGH qualifies as a “new provider” under section 413.30(e).2
*347III.
In sum, we conclude that “provider” as used in section 413.30(e) unambiguously refers to the business institution providing the skilled nursing services. It therefore follows that the regulation permits consideration of the institution’s past and current ownership, but not the past and current ownership of a particular asset of that institution. The Secretary’s interpretation, however, equates the ownership of an institution providing skilled nursing services with the ownership of a particular asset of that institution. Since there is no language in the regulation that would permit the denial of the exemption because an asset of the new institution was previously owned by an unrelated SNF, the Secretary’s interpretation is inconsistent with the plain language of the regulation and cannot be allowed to stand.3 See Gardebring v. Jenkins, 485 U.S. 415, 430, 108 S.Ct. 1306, 99 L.Ed.2d 515 (1988) (explaining that a reviewing court should be “hesitant to substitute an alternative reading for the Secretary’s [reading of his own regulation] unless that alternative reading is compelled by the regulation’s plain language”); see also 5 U.S.C.A. § 706(2)(A) (requiring a reviewing court to “set aside agency action, findings, and conclusions” that are “not in accordance with law”).
The Secretary’s focus on the ownership of the beds may well be reasonable when considered against the realities of the skilled nursing industry. For example, the Secretary might reasonably believe that the new provider exemption should be applicable only when a new facility increases the options available to the community it serves by increasing the number of beds actually in use in that community. And we realize that, as is implicit in the Secretary’s argument, the right to operate beds is perhaps the most important part of a skilled nursing facility, so that the transfer of beds takes on special significance.
Nonetheless, while the reasonableness of an agency’s interpretation of a regulation is important if the regulation is ambiguous, an interpretation that is inconsistent with the plain language of an unambiguous regulation cannot be upheld simply because the interpretation, standing alone, seems reasonable enough. If section 413.30(e) fails to adequately address the considerations the Secretary believes important when determining whether the new provider exemption should be applied in any *348given case, then the Secretary should amend the regulation; he cannot reach the desired result by interpreting the regulation in a way wholly unconnected to the regulation’s plain language.
In this case, the Secretary's interpretation is altogether untethered from the plain language of the regulation. We therefore reject that interpretation, and we conclude that MGH is entitled to the “new provider” exemption set forth in section 413.30(e). Accordingly, we vacate the district court’s order granting summary judgment to the Secretary, and we remand with instructions to enter judgment in favor MGH.
VACATED AND REMANDED WITH INSTRUCTIONS.
. When this action commenced, the “new provider” exemption was found at 42 C.F.R. § 413.30(e) (1996); it is now found, in slightly revised form, at section 413.30(d) (2001). The references in this opinion to section 413.30 are to the 1996 version of the regulation.
. This conclusion is in no way dependent upon the status of the beds purchased by MGH or upon other intricacies of Maryland’s health care regulatory scheme. That is, because section 413.30(e) focuses on the past and present ownership of the business institution rather than the past and present ownership of the beds, MGH qualifies for the new provider exemption whether or not the beds are properly classified as “waiver beds” or operational beds and whether or not MGH would have received a certificate of need had it sought to establish its Transitional Care Center in some other manner. We recognize that MGH does not make this precise argument in its brief. MGH insists that it is entitled to the new provider exemption, but it also states that it would not be entitled to the exemption if operational beds had been transferred. Nonetheless, MGH's appeal has adequately presented to this court the question of the correct interpretation of section 413.30(e). MGH's inaccurate statement of one aspect of this purely legal question, therefore, does not affect our responsibility to properly interpret the regulation. See Kamen v. Kemper Fin. Servs., Inc., 500 U.S. 90, 99, 111 S.Ct. 1711, 114 L.Ed.2d 152 (1991) (“When an issue or claim is properly before the court, the court is *347not limited to the particular legal theories advanced by the parties, but rather retains the independent power to identify and apply the proper construction of governing law.”).
. In 1997, PRM § 2604.1 was replaced by PRM § 2533.1, which is substantially different and which arguably supports the Secretary's position. See PRM § 2533.1(E)(1)(b) (giving as an example of when the new provider exemption should be denied a situation in which "an institution ... purchases the right to operate (i.e., a certificate of need) long term care beds from an existing institution ... that has or is rendering skilled nursing or rehabilitative services to establish ... a long term care facility”). Because section 2533.1 did not exist at the time of the transactions giving rise to this case, we do not believe it is applicable. Moreover, the provisions of the PRM are treated as interpretive rules, see Shalala v. Guernsey Mem’l Hosp., 514 U.S. 87, 101-02, 115 S.Ct. 1232, 131 L.Ed.2d 106 (1995), and thus are entitled to "some deference,” but only to the extent that they represent a "permissible construction” of the relevant statute or regulation. See Reno v. Koray, 515 U.S. 50, 61, 115 S.Ct. 2021, 132 L.Ed.2d 46 (1995) (internal quotation marks omitted). Because section 413.30(e) can only be interpreted to allow consideration of the ownership of the institution seeking the new provider exemption, and not the ownership of the beds acquired by that institution, the example set forth in PRM § 2533.1(E)(1)(b) does not appear to represent a permissible construction of section 413.30(e).