Cite as: 508 U. S. 402 (1993)
Opinion of the Court
implementing a provision by regulation, our review is limited to determining whether the regulations promulgated exceeded the Secretary's statutory authority and whether they are arbitrary and capricious." Heckler v. Campbell, 461 U. S. 458, 466 (1983) (footnote and citations omitted). Besides being textually defensible, the Secretary's restrictive reading of clause (ii) comports with this broad delegation of authority. Congress saw fit to empower the agency to devise methods to estimate actual costs, and the agency has opted for the use of certain generalizations, with additional fine-tuning by way of exceptions, exemptions, reclassifications, and by making allowances for possible variations in costs consistent with efficiency. See supra, at 406, n. 3.15
What the agency forbids is the kind of wide-range, ad hoc reassessments of the accuracy of the chosen methods implicit in petitioners' interpretation. Indeed, and for all practical purposes, petitioners' contention is that the methods chosen by the agency did not take into account sufficient variables,
15 Moreover, we note that in its 1981 amendment to § 1395x(v), Congress explicitly endorsed the agency's method of implementing the statute by providing that "[t]he Secretary, in determining the amount of the payments that may be made . . . may not recognize as reasonable (in the efficient delivery of health services) routine operating costs for the provision of general inpatient hospital services by a hospital to the extent these costs exceed 108 percent of the mean of such routine operating costs per diem for hospitals, or, in the judgment of the Secretary, such lower percentage or such comparable or lower limit as the Secretary may determine. The Secretary may provide for such exemptions and exceptions to such limitation as he deems appropriate." 42 U. S. C. § 1395x(v)(1)(L)(i) (1976 ed., Supp. V), repealed, Pub. L. 97-248, § 101(a)(2), 96 Stat. 335.
See also H. R. Rep. No. 97-158, pp. 326-327 (1981).
As remarked earlier, see n. 12, supra, the thrust of this scheme (imposing a firm ceiling set above the mean, purportedly to account for possible inaccuracies in the methods, and allowing the Secretary to provide for appropriate waivers) is at least at some variance with the notion that a dissatisfied provider can exceed the imposed limits and invoke its own waivers for any reason the Secretary has failed to take into account.
419
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