Justice Powell
delivered the opinion of the Court.
The question presented is the validity of an injunction issued on behalf of a statewide class that requires the Secretary of Health and Human Services to adjudicate all future disputed disability claims under Title II of the Social Security Act, 42 U. S. C. §401 et seq., according to judicially established deadlines and to pay interim benefits in all cases of noncompliance with those deadlines.
h-H
Title II of the Social Security Act (Act) was passed m 1935. 49 Stat. 622, as amended, 42 U. S. C. §401 et seq. Among other things, it provides for the payment of disability insur-[106]*106anee benefits to those whose disability prevents them from pursuing gainful employment. 42 U. S. C. §423.1 Disability benefits also are payable under the Supplemental Security Income (SSI) program established by Title XVI of the Act, 76 Stat. 197, as amended, 42 U. S. C. § 1381. The disability programs administered under Titles II and XVI “are of a size and extent difficult to comprehend.” Richardson v. Perales, 402 U. S. 389, 399 (1971). Approximately two million disability claims were filed under these two Titles in fiscal year 1983.2 Over 320,000 of these claims must be heard by some 800 administrative law judges each year.3 To facilitate the orderly and sympathetic administration of the disability program of Title II, the Secretary and Congress have established an unusually protective four-step process for the review and adjudication of disputed claims. First, a state agency determines whether the claimant has a disability and the date the disability began or ceased.4 42 U. S. C. § 421(a); 20 CFR § 404.1503 (1983). Second, if the claimant is dissatisfied with that determination, he may request reconsideration of the determination. This involves a de novo reconsideration of the disability claim by the state agency, [107]*107and in some cases a full evidentiary hearing. §§404.907-404.921. Additional evidence may be submitted at this stage, either on the request of the claimant or by order of the agency. Third, if the claimant receives an adverse reconsideration determination, he is entitled by statute to an evidentiary hearing and to a de novo review by an Administrative Law Judge (ALJ). 42 U. S. C. §405(b); 20 CFR §§404.929-404.961 (1983). Finally, if the claimant is dissatisfied with the decision of the ALJ, he may take an appeal to the Appeals Council of the Department of Health and Human Services (HHS).5 §§404.967-404.983. These four steps exhaust the claimant’s administrative remedies. Thereafter, he may seek judicial review in federal district court. 42 U. S. C. § 405(g).
In this class action, the named plaintiffs sought declaratory and injunctive relief from delays encountered in steps two and three above. The action was initiated by Leon Day in November 1978 after his disability benefits were terminated and he suffered substantial delays in obtaining a reconsideration determination and in securing a hearing before an ALJ.6 After suffering similar delays, Amedie Maurais intervened in the action.7 On June 14, 1979, the District Court certified a statewide class consisting of:
“All present and future Vermont residents seeking to secure Social Security disability benefits who, following an initial determination by the defendant that no disability [108]*108exists, experience an unreasonable delay in the scheduling of and/or issuance of decisions in reconsiderations and fair hearings.” App. to Pet. for Cert. 12a, n. 1.
Plaintiffs argued before the District Court that the delays they had experienced violated their statutory right under 42 U. S. C. § 405(b) (1976 ed., Supp. V) to a hearing within a reasonable time.8 Both parties submitted the case to the District Court on motions for summary judgment. On the basis of the undisputed evidence, the District Court held that, as to all claimants for Title II disability benefits in Vermont, delays of more than 90 days from a request for hearing before an ALJ to the hearing itself were unreasonable.9 It granted partial summary judgment to the plaintiff class on that issue in December 1979.
After the submission of additional evidence, the District Court considered motions for summary judgment concerning the reasonableness of delays in the reconsideration process. The additional evidence also was undisputed. It consisted of factual summaries of 77 randomly selected disability cases submitted by the Secretary. The District Court noted that the “summaries support the positions of both parties. They show the reconsideration process is often time consuming and [109]*109complex. They also show that the process is replete with unexplained delay; other requests are processed with commendable dispatch.” App. to Pet. for Cert. 25a. In 27 of the 77 cases, reconsideration determinations took longer than 90 days. In each of these 27, the District Court concluded that the delays were caused by agency inefficiencies and were not justified by the “necessary steps in the reconsideration process.” Id., at 28a. On the basis of this survey, the District Court concluded that, as a rule, delays of more than 90 days in making reconsideration determinations were unreasonable and violated the claimant’s statutory rights.10 In August 1981, the District Court granted summary judgment for respondents on the reconsideration aspect of the case.
In November 1981, the District Court issued an injunction in favor of the statewide class that “ordered and directed [the Secretary] to conclude reconsideration processing and issue reconsideration determinations within 90 days of requests for reconsideration made by claimants.”11 The injunction also required ALJs to provide hearings within 90 days after the [110]*110request is made by claimants.12 Finally, it ordered payment of interim benefits to any claimant who did not receive a reconsideration determination or hearing within 180 days of the request for reconsideration or who did not receive a hearing within 90 days of the hearing request.13
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Justice Powell
delivered the opinion of the Court.
The question presented is the validity of an injunction issued on behalf of a statewide class that requires the Secretary of Health and Human Services to adjudicate all future disputed disability claims under Title II of the Social Security Act, 42 U. S. C. §401 et seq., according to judicially established deadlines and to pay interim benefits in all cases of noncompliance with those deadlines.
h-H
Title II of the Social Security Act (Act) was passed m 1935. 49 Stat. 622, as amended, 42 U. S. C. §401 et seq. Among other things, it provides for the payment of disability insur-[106]*106anee benefits to those whose disability prevents them from pursuing gainful employment. 42 U. S. C. §423.1 Disability benefits also are payable under the Supplemental Security Income (SSI) program established by Title XVI of the Act, 76 Stat. 197, as amended, 42 U. S. C. § 1381. The disability programs administered under Titles II and XVI “are of a size and extent difficult to comprehend.” Richardson v. Perales, 402 U. S. 389, 399 (1971). Approximately two million disability claims were filed under these two Titles in fiscal year 1983.2 Over 320,000 of these claims must be heard by some 800 administrative law judges each year.3 To facilitate the orderly and sympathetic administration of the disability program of Title II, the Secretary and Congress have established an unusually protective four-step process for the review and adjudication of disputed claims. First, a state agency determines whether the claimant has a disability and the date the disability began or ceased.4 42 U. S. C. § 421(a); 20 CFR § 404.1503 (1983). Second, if the claimant is dissatisfied with that determination, he may request reconsideration of the determination. This involves a de novo reconsideration of the disability claim by the state agency, [107]*107and in some cases a full evidentiary hearing. §§404.907-404.921. Additional evidence may be submitted at this stage, either on the request of the claimant or by order of the agency. Third, if the claimant receives an adverse reconsideration determination, he is entitled by statute to an evidentiary hearing and to a de novo review by an Administrative Law Judge (ALJ). 42 U. S. C. §405(b); 20 CFR §§404.929-404.961 (1983). Finally, if the claimant is dissatisfied with the decision of the ALJ, he may take an appeal to the Appeals Council of the Department of Health and Human Services (HHS).5 §§404.967-404.983. These four steps exhaust the claimant’s administrative remedies. Thereafter, he may seek judicial review in federal district court. 42 U. S. C. § 405(g).
In this class action, the named plaintiffs sought declaratory and injunctive relief from delays encountered in steps two and three above. The action was initiated by Leon Day in November 1978 after his disability benefits were terminated and he suffered substantial delays in obtaining a reconsideration determination and in securing a hearing before an ALJ.6 After suffering similar delays, Amedie Maurais intervened in the action.7 On June 14, 1979, the District Court certified a statewide class consisting of:
“All present and future Vermont residents seeking to secure Social Security disability benefits who, following an initial determination by the defendant that no disability [108]*108exists, experience an unreasonable delay in the scheduling of and/or issuance of decisions in reconsiderations and fair hearings.” App. to Pet. for Cert. 12a, n. 1.
Plaintiffs argued before the District Court that the delays they had experienced violated their statutory right under 42 U. S. C. § 405(b) (1976 ed., Supp. V) to a hearing within a reasonable time.8 Both parties submitted the case to the District Court on motions for summary judgment. On the basis of the undisputed evidence, the District Court held that, as to all claimants for Title II disability benefits in Vermont, delays of more than 90 days from a request for hearing before an ALJ to the hearing itself were unreasonable.9 It granted partial summary judgment to the plaintiff class on that issue in December 1979.
After the submission of additional evidence, the District Court considered motions for summary judgment concerning the reasonableness of delays in the reconsideration process. The additional evidence also was undisputed. It consisted of factual summaries of 77 randomly selected disability cases submitted by the Secretary. The District Court noted that the “summaries support the positions of both parties. They show the reconsideration process is often time consuming and [109]*109complex. They also show that the process is replete with unexplained delay; other requests are processed with commendable dispatch.” App. to Pet. for Cert. 25a. In 27 of the 77 cases, reconsideration determinations took longer than 90 days. In each of these 27, the District Court concluded that the delays were caused by agency inefficiencies and were not justified by the “necessary steps in the reconsideration process.” Id., at 28a. On the basis of this survey, the District Court concluded that, as a rule, delays of more than 90 days in making reconsideration determinations were unreasonable and violated the claimant’s statutory rights.10 In August 1981, the District Court granted summary judgment for respondents on the reconsideration aspect of the case.
In November 1981, the District Court issued an injunction in favor of the statewide class that “ordered and directed [the Secretary] to conclude reconsideration processing and issue reconsideration determinations within 90 days of requests for reconsideration made by claimants.”11 The injunction also required ALJs to provide hearings within 90 days after the [110]*110request is made by claimants.12 Finally, it ordered payment of interim benefits to any claimant who did not receive a reconsideration determination or hearing within 180 days of the request for reconsideration or who did not receive a hearing within 90 days of the hearing request.13 The Court of Appeals for the Second Circuit affirmed the District Court’s determination that the challenged delays violated the statute and upheld the District Court’s remedial order. Day v. Schweiker, 685 F. 2d 19 (1982). We granted certiorari to consider whether it is appropriate for a federal court, without statutory authorization, to prescribe deadlines for agency adjudication of Title II disability claims and to order payment of interim benefits in the event of noncompliance. 461 U. S. 904 (1983).14 We conclude that the legislative history makes [111]*111clear that Congress, fully aware of the serious delays in resolution of disability claims, has declined to impose deadlines on the administrative process. Accordingly, we vacate the judgment below.
II
The Secretary does not challenge here the determination that § 405(b) requires administrative hearings to be held within a reasonable time. Nor does she challenge the District Court’s determination that the delays encountered in the cases of plaintiffs Day and Maurais violated that requirement.15 She argues only that a statewide injunction that imposes judicially prescribed deadlines on HHS for all future disability determinations is contrary to congressional intent and constitutes an abuse of the court’s equitable power. She argues in the alternative that even if the injunction is appropriate, the order requiring payment of interim benefits in cases of noncompliance is not. The Secretary looks primarily to legislative history to support both arguments.
A
The Secretary correctly points out that Congress repeatedly has been made aware of the long delays associated with resolution of disputed disability claims and repeatedly has considered and expressly rejected suggestions that mandatory deadlines be imposed to cure that problem.16 She ar~ [112]*112gues that Congress expressly has balanced the need for timely disability determinations against the need to ensure quality decisions in the face of heavy and escalating workloads and limited agency resources. In striking that balance, the Secretary argues, the relevant legislative history also shows that Congress to date has determined that mandatory deadlines for agency adjudication of disputed disability claims are inconsistent with achievement of the Act’s primary objectives, and that the District Court’s statewide injunction flatly contradicts that legislative determination. We find this argument persuasive.
Congressional concern over timely resolution of disputed disability claims under Title II began at least as early as 1975.17 It has inspired almost annual congressional debate since that time.18 The consistency with which Congress has expressed concern over this issue is matched by its consistent refusal to impose on the Secretary mandatory deadlines for resolution of disputed disability claims.
In 1975, the House Social Security Subcommittee held hearings on the delays encountered in resolving disputed Social Security claims,19 and 60 Members of the House sponsored a bill imposing statutory deadlines for each step in the [113]*113administrative review of disputed SSA claims.20 Expressions of concern were voiced in both the Senate and the House over the “huge backlog of some 103,000 cases awaiting hearing” before an ALJ. S. Rep. No. 94-550, p. 3 (1975); accord H. R. Rep. No. 94-679, pp. 1-2 (1975).21 Despite this concern, the Staff of the House Subcommittee advised against statutory deadlines because of the potential “adverse effect on the quality and uniformity of disability adjudication which is already somewhat suspect.” Staff of the Subcommittee on Social Security of the House Committee on Ways and Means, Appeals Process: Areas of Possible Administrative or Legislative Action, 94th Cong., 1st Sess., 1-2 (Comm. Print 1975).22 Congress agreed and refused to impose statutory deadlines on the Secretary.
Bills proposing statutory deadlines have been proposed almost annually since 1975,23 and congressional concern over the delay problem has remained high. For example, in 1980 Congress directed the Secretary to submit a report recommending the establishment of appropriate and realistic deadlines for resolution of disputed SSA claims. It ordered the [114]*114Secretary in doing so to consider “both the need for expeditious processing of claims for benefits and the need to assure that all such claims will be thoroughly considered and accurately determined.” Pub. L. 96-265, §308, 94 Stat. 458, note following 42 U. S. C. §401. The Senate Report explained that “Congress could then evaluate the recommendations for consistency with the elements it wishes to emphasize and, if needed, take further action next year.” S. Rep. No. 96-408, p. 59 (1979).24 The Secretary submitted a report in October 1980, suggesting deadlines of 150 days for reconsideration determinations and 165 days from hearing to posthearing decision, both subject to certain exceptions. U. S. Dept, of Health and Human Services, Report to Congress, Implementation of Section 308, Public Law 96-265, p. 1 (Oct. 21, 1980). The Secretary, however, cautioned Congress that budget and staff limitations and burgeoning workloads “mitigate [sic] against the Department meeting its proposed time limitation objectives in every instance.” Id., at 2. Since receiving the Secretary’s report, Congress has'refused to impose mandatory deadlines on the Secretary, or to direct her to promulgate them herself.
Certainly in Congress the concern that mandatory deadlines would jeopardize the quality and uniformity of agency decisions has prevailed over considerations of timeliness. In its most recent comment on the subject, the House Commit[115]*115tee on Ways and Means expressly disapproved mandatory hearing deadlines and indicated disagreement with recent judicial decisions imposing such time restrictions. Criticizing the decision in Blankenship v. Secretary of HEW, No. C75-0185L(A) (WD Ky., May 6, 1976), which had imposed judicially prescribed hearing deadlines on the Secretary and ordered the payment of interim benefits in the event of noncompliance,25 the Committee reported:
“[The] Committee believes that a disability claimant is entitled to a timely hearing and decision on his appeal, but it also recognizes that the time needed before a well-reasoned and sound disability hearing decision can be made may vary widely on a case-by-case basis. . . . Establishing strict time limits for the adjudication of every case could result in incorrect determinations because time was not available to . . . reach well-reasoned decisions in difficult cases.” H. R. Rep. No. 97-588, pp. 19-20 (1982).26
[116]*116Finally, the Secretary points out that judicially imposed deadlines may vary from case to case and from State to State, requiring HHS to shuffle its staff nationwide. Not only would this tend seriously to disrupt agency administration, but wide variations in judicially imposed deadlines also would prevent realization of Congress’ oft-repeated goal of uniform administration of the Act. See, e. g., S. Rep. No. 96-408, pp. 52-56 (1979) (emphasizing concern over “state-to-state” variations and expressing hope that current legislation would “both improve the quality of determinations and ensure that claimants throughout the Nation will be judged under the same uniform standards and procedures”) (emphasis added).27
B
Legislation enacted by Congress in 1980 and 1982 is fully consistent with the repeated rejection of proposals for mandatory deadlines and with efforts by Congress to ensure qual[117]*117ity and uniformity in agency adjudication. In 1980, Congress amended § 405(b) to require that every initial determination of ineligibility contain an easily understandable discussion of the evidence and the reasons for the determination. Pub. L. 96-265, 94 Stat. 457, 42 U. S. C. § 405(b). At the same time, Congress added §421(i) to require a tri-annual assessment of the continuing eligibility of recipients of disability benefits. Pub. L. 96-265, 94 Stat. 460, 42 U. S. C. § 421(i). Congress also included in the 1980 amendments a requirement that the Secretary review at least 65% of all determinations of eligibility made by state agencies in any fiscal year after 1982. Pub. L. 96-265, 94 Stat. 456, 42 U. S. C. §§421(c)(2), (3).28 Before 1972, the Secretary had reviewed the majority of state determinations as a matter of course. A growing workload required the Secretary to abandon this practice for a sample review of only 5% of the state agency determinations. H. R. Rep. No. 96-100, p. 10 (1979). The 1980 amendment, requiring review of a substantially higher percentage of state agency disability determinations, presumably will have an effect on the timely resolution of disputed disability claims.29
Finally, in 1983 Congress provided that effective January 1, 1984, an initial determination that previously granted disability benefits should be terminated entitles the claimant not only to a de novo review on reconsideration, but to a full evi-dentiary hearing as well. Pub. L. 97-455, 96 Stat. 2499, 42 U. S. C. § 405(b)(2). All of these changes will impose additional duties on the Secretary and her heavily burdened staff. In light of Congress’ continuing concern that mandatory deadlines would subordinate quality to timeliness, and its recent efforts to ensure the quality of agency determinations, [118]*118it hardly could have contemplated that courts should have authority to impose the very deadlines it repeatedly has rejected.30
C
Persuasive evidence of the intention of Congress also is found in the distinction it has made between the resolution of SSI claims for old-age and survivor benefits and SSI claims for disability benefits. Section 405(b), governing eligibility determinations under Title II, and § 1383(c)(1), governing eligibility determinations under Title XVI, are virtually identical. In the event of adverse determinations, both require the Secretary to provide claimants with “reasonable notice and opportunity for a hearing.” In the case of disputed SSI claims, however, § 1383(c)(2) requires a posthearing decision within 90 days of the hearing request, except in the case of disputed disability claims. This provision makes two things clear: (i) Congress will establish hearing deadlines when it deems them appropriate; and (ii) Congress has determined that it is inappropriate to subject disputed disability claims to mandatory deadlines.31
Ill
The Secretary also contends that quite apart from the congressional rejection of the mandatory deadlines discussed above, the District Court’s order unduly intruded upon the [119]*119discretion with which Congress has granted the Secretary to adopt rules and procedures for the adjudication of claims. See Heckler v. Campbell, 461 U. S. 458, 466 (1983); Schweiker v. Gray Panthers, 453 U. S. 34, 43-44 (1981); Batterton v. Francis, 432 U. S. 416, 425 (1977). We need not reach this broader contention, however, because of repeated congressional rejection of the imposition of mandatory deadlines on agency adjudication of disputed disability claims.32 In light of the unmistakable intention of Congress, it would be an unwarranted judicial intrusion into this pervasively regulated area for federal courts to issue injunctions imposing deadlines with respect to future disability claims.33 Accordingly, we vacate the judgment of the Court of Appeals, and remand the case for further proceedings consistent with this opinion.34
It is so ordered.