Opinion for the Court filed by Circuit Judge STEPHEN F. WILLIAMS.
Plaintiff-appellants Monmouth Medical Center and Staten Island University Hospital are acute-care facilities that receive payments under Medicare Part A for services to Medicare beneficiaries. Since 1983, the Secretary of Health and Human Services has made payments to cover hospital operating costs for inpatient care under the Prospective Payment System (“PPS”), which reimburses according to a uniform national rate schedule. See 42 U.S.C. § 1395ww(d). The two hospitals, because they serve a disproportionate share of low-income Medicare recipients, are eligible for “disproportionate share hospital” (“DSH”) adjustments to their PPS payments. See 42 U.S.C. § 1395ww(d)(5)(F). Monmouth and Staten Island sought the aid of the district court in an attempt to have their fiscal year (“FY”) 1993 and FY 1994 DSH payments recalculated, asserting jurisdiction under 42 U.S.C. § 1395oo(a)(l)(a), 28 U.S.C. § 1331, and 28 U.S.C. § 1361. The district court decided that the hospitals failed to follow the statutorily mandated procedure for appealing their payments, that 42 U.S.C. § 1395Ü precludes other review, and that, accordingly, it lacked subject matter jurisdiction. We reverse.
*809 The Secretary of HHS has delegated authority to administer the Medicare Act to the Health Care Financing Administration (“HCFA”). 1 Determinations of payment amounts are in turn often delegated to fiscal intermediaries, generally private insurers that manage the payments for the Secretary. See 42 U.S.C. § 1395h. Estimated payments are made periodically and an annual accounting is done by the intermediary in the form of a Notice of Provider Reimbursement (“NPR”) based on a cost report submitted by the provider after the close of each fiscal year.
The Medicare Act has detailed instructions on the meаns for seeking review of payment determinations. Under 42 U.S.C. § 1395oo(a)(l)(A) a dissatisfied provider may appeal two types of “final determinations” to the Provider Reimbursement Review Board (“Board”). Clause (i) covers a fiscal intermediary’s final reimbursement decision, commonly the NPR, and clause (ii) covers a final determination of the Secretary regarding payments under 42 U.S.C. §§ 1395ww(b) or (d), including the DSH payments. Appeals are to be filed within 180 days of notice of the final determination. Id. § 1395oo(a)(3). In either case, the decision of the Board is then reviewable by filing in district court within 60 days of notice of the decision, or by the Secretary’s own motion. Id. § 1395oo(f). Section 1395Ü generally forecloses other avenues of review by incorporating the review-limiting provision of the Social Security Act, 42 U.S.C. § 405(h):
The findings and decision of the [Secretary of HHS] after a hearing shall be binding upon all individuals who were parties to such hearing. No findings of fact or decision of the [Secretary of HHS] shall be reviewed by any person, tribunal, or governmental agency except as herein provided. No action against the United States, the [Secretary of HHS], or any officer or employee thereof shall be brought under section 1331 or 1346 of title 28 to recover on any claim arising under this subchapter.
42 U.S.C. § 405(h).
The Secretary’s regulations provide three additional chаnnels of administrative review. Under 42 CFR § 405.1841(b), a laterfiled request for Board review may be considered by the Board, provided that good cause is shown and the request is filed no more than three years after the NPR. The regulations also provide two possibilities for the reopening of a determination, again with a three-year limit. 42 CFR § 405.1885(a) provides for reopening, at the discretion of the decisionmaker, on the motion of the provider. Subsectiоn (b) of that same regulation, which ultimately controls here, mandates reopening in one special circumstance. It directs that the decision
shall be reopened and revised by the intermediary if ... the [HCFA] notifies the intermediary that such determination or decision is inconsistent with the applicable law, regulations, or general instructions issued by the [HCFA].
42 CFR § 405.1885(b) (emphasis added).
Under the statute authorizing DSH adjustments, eligibility for and calculation of the payment require the summing of two fractions. The numerator of one of these fractions calls for the number of inpatient days of patients who “were eligible for medical assistance under a State plan [i.e., Medicaid].” 42 U.S.C. § 1395ww(d)(5)(F)(vi)(II) (emphasis added). The Secretary promulgated a regulation on how to make the calculation and *810 has repeatedly amended it. See 42 CFR § 412.106 (1998) (version in force when original DSH calculations were made). At the same time, the Secretary published an interрretation of that rule in the Federal Register as part of the notice and comment rulemaking implementing the PPS. See 51 Fed.Reg. 16,772, 16,777 (May 6, 1986); 51 Fed.Reg. 31,454, 31,460 (September 3, 1986). Reading “who were eligible” as “ ‘who (for such days) were eligible’ ” the Secretary declared that “Medicaid covered days will include only those days for which benefits are payable.” 51 Fed.Reg. at 16,777/2-3 (emphasis added). This interpretation had the effect of reducing payments by limiting adjustments for patients who wеre “eligible” for Medicaid benefits under the natural reading of the word, but who, because of a particular state’s program, were not receiving such benefits on a given day.
Neither hospital timely availed itself of the right to appeal the NPRs in question. But other providers did. The Secretary’s interpretation fared poorly, being struck down in four of our sister circuits. See
Cabell Huntington Hosp. v. Shalala,
The hospitals nonetheless sought recalculation of their DSH payments, filing with their intermediaries for reopening well within the three years required by § 405.1885. Their respective intermediaries denied the requests, citing HCFAR 97-2. Both hospitals also sought Board review in attempts to satisfy the jurisdictional requirements of 42 U.S.C. § 1395oo. They filed their appeals within 180 days of the publication of HCFAR 97-2, but the intermediaries objected that the trigger event was each hospital’s NPR, not HCFAR 97-2. In response, the hospitals invoked § 405.1841(b), which allows extension of the time limit fоr “good cause.” They argued that the delay was unavoidable because they could not have anticipated HCFAR 97-2’s refusal to grant reopening. In separate letters to the providers, the Board stated that “your rationale for late filing does not constitute good cause” and that it lacked jurisdiction to hear the appeals. Both hospitals sought review in the district court. We review the district court’s jurisdictional determination
de novo.
See
Moore v. Valder,
The hospitals first invoke the jurisdiction of the district court under 42 U.S.C. § 1395oo(f) to review the Board’s *811 denial of their appeals. Having acknowledged that their appeals were untimely with respect to the NPRs, they frame the appeals here as challenges to the reopening prohibition in HCFAR 97-2. At issue is whether the Board could properly consider such an attack. As noted above, clause (i) of § 1395oo(a)(l)(A) gives the Board jurisdiction to review final reimbursement determinations by intermediaries. But it appears that neither of the hospitals framed its appeal as being from its intermediary’s non-reopening decision, and an HCFA Ruling is not the action of an intermediary. Staten Island did not even request reopening until three months after it sought Board review. And Monmouth, while it tried for reopening before making its appeal to the board, made absolutely no mention of its intermediary or its reopening request in its appeal to the Board.
Clause (ii), which applies to final determinations of the Secretary regarding a provider’s PPS calculations, brings jurisdiction no nearer. In
Washington Hosp. Center v. Bowen,
Our conclusion that the hospitals’ appeals to the Board fit neither clause (i) nor clause (ii) is at least consistent with, if not required by, the Supreme Court’s recent opinion in
Your Home Visiting Nurse Services, Inc. v. Shalala,
One might argue that where a provider is seeking reopening under § 405.1885(b), *812 the Sanders concern about the finality of decision is lessened, inasmuch as such cases will be relatively few in number; they arise only if the HCFA determines that a prior decision or set of decisions is inconsistent with applicable law. But it would still remain unclear how this distinction would change the character of the reopening decision itself from “not a final determination” to “final determination.” And of course it should make no difference if the analysis arises out of clause (i) or clause (ii). In any event, we reserve our own final determination on this issue for a case in which it is more clearly presented; here HCFAR 97-2 can in no way be mistaken for a final determination for the purposes of judicial review under §§ 1395oo(a) & (f).
The hospitals nonetheless argue that our opinion in Washington Hospital Center and the HCFA’s application of it in National Medical Enterprises Malpractice PPS Group Appeal, Case No. 87-5050G, HCFA Adm. Dec. (Oct. 5, 1988), together compel the interpretation that clause (ii) creates a right to Board review 180 days after the “issuance, modification, or invalidation of a HCFAR.” App. Open. Br. at 48. They do no such thing. Washington Hospital Center held invalid HCFAR 84-1, which had barred appeal of PPS determinations until after an NPR was issued. Providers in National Medical Enterprises sought Board review for their payments in the wake of that case, but submitted their appeal more than 180 days from the issuance of our decision. The Administrator’s decision did indeed suggest that a more timely appeal would have been successful, but that conclusion was deрendent on the peculiar operation of HCFAR 84-1, which had previously operated as a bar on properly filed appeals of right. See National Medical Enterprises at 3. In the absence of HCFAR 97-2 the hospitals would not have had recourse to the Board, as they have already acknowledged.
The hospitals next seek jurisdiction under 28 U.S.C. § 1331 for review of the reopening preclusion in HCFAR 97-2. Such review could not be more plainly off limits under 42 U.S.C. § 405(h), which explicitly withholds § 1331 jurisdiсtion for “any claim arising under this title.” The Supreme Court has consistently interpreted this phrase broadly, such that jurisdiction is barred when “ ‘both the standing and the substantive basis for the presentation’ of the claims” is the Medicare Act.
Heckler v. Ringer,
The hospitals make a plausible argument that jurisdiction may be had under the limited exception to § 405(h) carved out by
Bowen v. Michigan Academy of Family Physicians,
The hospitals lastly seek jurisdiction under 28. U.S.C. § 1361 and relief ordering the intermediaries to reopen their determinations. The Supreme Court has on several occasions expressly reserved the question of whether § 1361 jurisdiction is precluded by § 405(h). See
Your Home,
Neither party questions our ability to provide relief in the absence of the intermediaries as parties to this lawsuit, but we note that their non-joinder does not undermine our jurisdiction. The intermediaries are agents of the Secretary charged with the relevant duties under the Medicare Act and its regulations, and, as such, they may properly be bound by a writ of mandamus against the Secretary. See
United States ex rel. Rahman v. Oncology Associates,
The hospitals argue that 42 CFR § 405.1885(b) was triggered by HCFAR 97-2 and that the intermediaries therefore had a non-discretionary duty to reopen their determinations. The Secretary responds that the choice of whether or not to advise providers that a regulation is “inconsistent with the applicable law,” thereby triggering the intermediaries’ mandatory reopening duty under § 405.1885(b), is committed to the non-reviewable discretion of the Secretary. But the issue is not whether we may review the choice to advise or not advise as to consistency with applicable law; it is whether the Secretary, acting through the HCFA Administrator, in effect announced a finding of incоnsistency (even while purporting to veto reopening).
To be sure, HCFAR 97-2 studiously avoided using the magic words “inconsistent with the applicable law,” and instead called the earlier interpretation “contrary to the applicable law in four judicial circuits.” HCFAR 97-2. The Secretary argues that HCFAR 97-2 merely “acquiesced prospectively,” in the interests of national uniformity, without actually admitting its illegality. But HCFAR 97-2 also purports to change an existing interprеtation, and under the law of this circuit *814 altering an interpretive rule (interpreting an agency regulation) requires notice and opportunity for comment unless, of course, the original interpretation was invalid and therefore a nullity (as discussed below).
The Medicare Act places notice and comment requirements on the Secretary’s substantive rulemaking similar to those created by the APA. See 42 U.S.C. § 1395hh(b); 5 U.S.C. § 553(b). We have not had opportunity to dеcide whether the Medicare Act requirement of notice and comment for “changes [of] a substantive legal standard” creates a more stringent obligation or whether it somehow changes the dividing line between legislative and interpretive rules.
2
But it seems fair to infer that, as the Medicare Act was drafted after the APA, § 1385hh(c)’s reference to “interpretive rules” without any further definition adopted an exemption at least
similar
in scope to that of the APA. See
Warder v. Shalala,
But characterization as an interpretive rule does not relieve the Secretary of notice and comment requirements when a valid interpretation exists. In
Paralyzed Veterans of America v. D.C. Arena L.P.,
The new interpretation established by HCFAR 97-2 would therefore be unlawful absent notice and comment rulemaking, unless the original interpretation was itself invalid. See
Dixon v. United States,
Concluding that the Secretary
did
in fact give notice of the interpretation’s inconsistency with applicable law, we also find that § 405.1885(b) imposed a clear duty on intermediaries to reopen DSH payment determinations for the hospitals. The portion of HCFAR 97-2 that conflicts
*815
with thаt duty is simply inapplicable. In addition, we think it insignificant that, because of the Secretary’s own three year limitation, reopening would not be available if sought today. Although mandamus is classified as a legal remedy, its issuance is largely controlled by equitable principles. See
Duncan Townsite Co. v. Lane,
The Secretary argues that the hospitals have failed to exhaust their remedies, because they failed to file proper appeals of their NPRs under § 1395oo(a). But that fact is hardly relevant here. The question is whether they have done all they can to vindicate their right to reopening. We have already shown above how all other avenues of relief are either foreclosed or futile.
Finally, the Secretary half-heartedly suggests that the hospitals may have waived mandamus jurisdiction by failing to specify § 1361 as one of the bases for jurisdiction until their response to the Secretary’s motion to dismiss. But the Secretary does not contend (apart from the arguments rejected above) that the hospitals failed to allege sufficient facts to support their mandamus claim, the essential test for legal sufficiency.
Richardson v. U.S.,
Accordingly, the judgment of the district court is reversed and the case remanded for further proceedings consistent with this opinion.
So ordered.
Notes
. HCFA was recently renamed and became the Centers for Medicare & Medicaid Services. We will continue to use the designation HCFA in this opinion to maintain consistency with the record below.
. Although no explicit exception to those requirements is made for "interpretive rules,” an exception is implicit in the provision for periodic publication for such rules, see 42 U.S.C. § 1395hh(c), and courts generally have assumed the exception. See
Health Ins. Ass’n of America, Inc. v. Shalala,
