Tom Krause, NOSSCR Lifetime Member

Introduction

Roughly one million children now receive Supplemental Security Income (SSI) disability benefits, about 13.5 percent of all SSI recipients according to the Congressional Research Service. They are children with serious physical and mental impairments in low-income households, and for them and their families, SSI can be a big help. And your knowledge and experience can help you help these children obtain SSI Childhood Disability benefits.

Monthly SSI payments help families meet basic needs and the added costs of a disability. In most states, the award also brings Medicaid coverage, and the program’s rules reserve large back payments for the child’s treatment and education. Childhood SSI claims are governed by a standard that looks much different from the adult rules most of us work with every day. There is no residual functional capacity, no past relevant work, and no grid. Instead, adjudicators ask how a child functions compared with same-age peers who do not have impairments.

That standard is the product of more than fifty years of statute, litigation, and regulatory revision. This article begins with what SSI does for a disabled child, then traces that history from the 1972 statute through Sullivan v. Zebley and the 1996 welfare-reform amendments to the present day. It then walks through how SSA decides a child’s claim today and closes with a practical point: in a childhood case, as in an adult case, a well-supported Medical Source Statement is often the most important document in the file. An appendix lists the Social Security Rulings and sources on childhood disability.

What SSI does for a disabled child

Congress included children in SSI deliberately. The House Ways and Means Committee report on the 1972 legislation described disabled children in low-income households as “among the most disadvantaged of all Americans” and said they deserved “special assistance in order to help them become self-supporting members of our society.”

The most direct help is the monthly payment. For 2026 the federal benefit rate is $994 a month, and the average child payment in December 2024 was about $813. Help can also begin before the claim is decided. Under the presumptive disability rules, a child with a condition such as total blindness, total deafness, cerebral palsy, Down syndrome, muscular dystrophy, a severe intellectual disorder (age four or older), or a birth weight under 2 pounds 10 ounces can receive up to six months of payments while the state agency decides the claim. Those payments are not treated as an overpayment if the child is later found not disabled.

The second form of help is health care. In most states, a child who receives SSI can get Medicaid, in some cases automatically; in others the family must apply separately. SSA also refers families of children on SSI to their state’s program for children with special health care needs, which serves children through clinics, private offices, hospital programs, and community agencies.

The program also keeps the money focused on the child. When a child is owed back benefits of more than six times the monthly benefit rate, the representative payee must open a dedicated account, and the funds may be spent only on allowable expenses such as medical treatment, education, and job skills training. At a continuing disability review, the payee must show that the child has been receiving medically necessary and available treatment, unless the condition is not amenable to treatment. A payee who refuses without good cause can be replaced.

The original statutory basis

Congress created SSI in the Social Security Amendments of 1972, Pub. L. No. 92-603, signed October 30, 1972. The program began paying benefits in January 1974, replacing the state-run adult assistance programs for the aged, blind, and disabled. Unlike Title II disability, SSI was designed to reach people with little or no work history, which made it possible to include children.

The statute defined adult disability in the familiar way: inability to engage in any substantial gainful activity because of a medically determinable impairment expected to last at least twelve months or to result in death. For children, Congress added a single clause. A child under 18 was disabled if he or she suffered from “any medically determinable physical or mental impairment of comparable severity.” The statute did not say how comparable severity was to be measured, and that silence set the stage for nearly two decades of conflict.

SSA’s answer was the childhood listings. Under the pre-1990 regulations, a child whose impairment met or medically equaled a listed impairment was found disabled. A child whose impairment did not meet or equal a listing was found not disabled, without any individualized look at how the impairment actually affected the child’s functioning. Adults who missed the listings could still prevail at steps four and five on the basis of their residual functional capacity, age, education, and work experience. Children had no equivalent path. For a child, the listings were the beginning and the end of the inquiry.

The Zebley litigation

The challenge to the listings-only approach came from Community Legal Services (CLS) of Philadelphia. In 1983, CLS filed a class action in the U.S. District Court for the Eastern District of Pennsylvania on behalf of Brian Zebley and other children who had been denied SSI. On January 10, 1984, the district court certified a nationwide class of children whose claims had been or would be denied or terminated under the childhood disability rules.

The case did not start well. In 1986 the district court granted summary judgment to the Secretary of Health and Human Services, finding the regulations facially valid (642 F. Supp. 220). The Third Circuit reversed in part in 1988 (855 F.2d 67), holding that the class was entitled to summary judgment on its claim that children must receive an individualized functional assessment. The Supreme Court granted certiorari to resolve a circuit split.

The CLS team that carried the case for nearly seven years included NOSSCR members Jonathan Stein, Richard Weishaupt, and former NOSSCR President Thomas D. (Tom) Sutton, also of CLS, were on the respondents’ brief.

On February 20, 1990, the Court ruled 7–2 for the class in Sullivan v. Zebley, 493 U.S. 521 (1990). Writing for the majority, Justice Blackmun held that the regulations were “simply inconsistent with the statutory standard of ‘comparable severity'” and “manifestly contrary to the statute.” The Court reasoned that no set of listings, however carefully drawn, could capture every child whose impairments were as severe as those that would disable an adult. An adult who missed the listings could still show disability through a functional, vocational analysis; a child needed some comparable opportunity. The Court also rejected the argument that functional assessment of children was impractical, pointing to inquiries into ordinary activities such as feeding, dressing, and attending school. Justice White, joined by Chief Justice Rehnquist, dissented.

The practical consequences were enormous. SSA was required to readjudicate claims denied or terminated on medical grounds dating back to January 1, 1980. Stein has described Zebley as the largest class action ever brought against the Social Security Administration. By his account, it extended benefits and Medicaid to more than 500,000 additional children and produced retroactive awards for about 153,000 class members.

Subsequent history

SSA first adopted an interim standard for pending claims under a May 3, 1990 stipulation and order. On February 11, 1991, it published new childhood regulations that added a functional equivalence analysis built on an individualized functional assessment, or IFA. Under the IFA, a child generally qualified with moderate limitations in three areas of functioning, or a marked limitation in one area and a moderate limitation in another. A second stipulation and order on March 14, 1991 set the terms of class relief, and notices went out to potential class members that summer. SSA also revised the childhood mental listings in 1990.

The child caseload grew quickly. CRS reports roughly 265,000 child recipients in December 1989 and about 917,000 by December 1995. CRS attributes the growth to Zebley itself, the 1990 mental listings, post-Zebley outreach, and rising child poverty.

President Clinton signed the Personal Responsibility and Work Opportunity Reconciliation Act of 1996 (PRWORA), Pub. L. No. 104-193, on August 22, 1996. PRWORA replaced “comparable severity” with the standard that governs today: a child under 18 is disabled if he or she has a medically determinable physical or mental impairment “which results in marked and severe functional limitations” and which can be expected to result in death or has lasted or can be expected to last at least twelve months. It required redeterminations under the adult rules at age 18, continuing disability reviews at least every three years for children whose impairments were likely to improve, and a review by age one for infants whose low birth weight was material to the disability finding.

SSA implemented PRWORA through interim final rules published February 11, 1997 and final rules published September 11, 2000. The final rules created the six-domain framework for functional equivalence that remains in place today. In 2009, SSA issued a series of rulings, SSR 09-1p through SSR 09-8p, effective in March 2009. SSR 09-1p describes the “whole child” approach to functional equivalence, and SSRs 09-3p through 09-8p explain each of the six domains.

Where things stand today

The statutory standard has not changed since 1996. The SSI Childhood Disability stood at about 1,002,887 in December 2024, with an average monthly payment of about $813. That year SSA paid about $10.3 billion to child recipients. In 2023, 294,129 children applied, and 56.2% of those with a DDS determination were allowed at the initial level. For 2026, the maximum federal benefit rate is $994 per month.

The main regulatory activity has come at the edges of the program. Effective March 23, 2026, SSR 26-1p rescinds and replaces SSR 05-3p on continuing disability reviews for children. Because functional equivalence is no longer tied to a specific listing, SSA now considers it once, at step 3 of the review, rather than at both steps 2 and 3. Separately, effective October 1, 2026, SSR 26-2p rescinds and replaces SSR 11-2p on documenting and evaluating disability in young adults, defined as people aged 18 to approximately 25. The new ruling applies, with some exceptions, to age-18 redeterminations. It confirms that SSA evaluates a young adult under the adult standard used for initial claims, rather than the medical improvement standard. It also notes that a child’s impairment that met a childhood listing “will often meet or medically equal a part A listing at age 18, unless the impairment(s) has medically improved.” For practitioners, its most useful passages concern school evidence. SSA will not equate achievement of an IEP goal with the ability to perform basic work activities without asking whether supports and accommodations made that achievement possible, and receipt of accommodations may itself indicate a work-setting limitation. Recent IEPs will frequently be relevant in age-18 redeterminations.

How SSA decides a child’s claim today

The childhood rules are found principally at 20 C.F.R. §§ 416.924 through 416.926a, with the six domains explained in SSRs 09-1p through 09-8p. SSA uses a three-step sequential evaluation, and each step can end the inquiry.

At step one, SSA asks whether the child is engaging in substantial gainful activity. Few children are, but an adolescent with significant earnings will be found not disabled regardless of medical severity. At step two, SSA asks whether the child has a medically determinable impairment or combination of impairments that is severe. At step three, SSA asks whether the impairment meets, medically equals, or functionally equals the listings. The twelve-month duration requirement applies throughout.

Functional equivalence, under 20 C.F.R. § 416.926a, is where most contested childhood cases are won or lost. An impairment functionally equals the listings if it causes “marked” limitations in two domains or an “extreme” limitation in one. The six domains are acquiring and using information; attending and completing tasks; interacting and relating with others; moving about and manipulating objects; caring for yourself; and health and physical well-being.

A “marked” limitation is one that “interferes seriously” with the child’s ability to independently initiate, sustain, or complete activities. It is “more than moderate” but “less than extreme,” and corresponds to standardized test scores at least two, but less than three, standard deviations below the mean. An “extreme” limitation “interferes very seriously” with those abilities and corresponds to scores at least three standard deviations below the mean, though it “does not necessarily mean a total lack or loss of ability to function.” For children under age three without standardized scores, a marked limitation generally means functioning at more than one-half but not more than two-thirds of chronological age, and an extreme limitation means functioning at one-half of chronological age or less. SSA will not rely on a test score alone. The health and physical well-being domain has its own frequency test: a marked limitation may be found where episodes of illness or exacerbation occur on average three times a year, or once every four months, each lasting two weeks or more.

The benchmark throughout is the child’s peers. SSA compares the child with same-age children who do not have impairments, asking “how appropriately, effectively, and independently” the child performs age-appropriate activities. The regulations divide childhood into five age groups and describe typical functioning in each domain for each group, except the health and physical well-being domain, which has no age-group descriptors.

Age group in 20 C.F.R. § 416.926a	Ages covered
Newborns and young infants	Birth to attainment of age 1
Older infants and toddlers	Age 1 to attainment of age 3
Preschool children	Age 3 to attainment of age 6
School-age children	Age 6 to attainment of age 12
Adolescents	Age 12 to attainment of age 18

Several other rules shape the analysis. Under SSR 09-1p’s “whole child” approach, SSA looks first at the child’s activities “at home, at school, and in your community” and then asks which domains those activities involve; “it is incorrect to assume that the effects of a particular medical impairment must be rated in only one domain.” Under 20 C.F.R. § 416.924a(b)(5), SSA must consider how well the child functions with extra help, adaptations, medication, or a structured or supportive setting, and how the child would function without them. A child who does well only in a special-education classroom or with constant parental supervision is not functioning independently. For premature infants, SSA uses a corrected chronological age under 20 C.F.R. § 416.924b(b). And 20 C.F.R. § 416.926a(m) lists examples of impairments that functionally equal the listings, including a physical impairment causing complete inability to function independently outside the home within age-appropriate norms and a need for 24-hour-a-day supervision for medical, including psychological, reasons.

The Medical Source Statement in childhood cases

In the September 2026 issue of the Forum, Neil H. Good and Shawn M. Good made the case that the Medical Source Statement is the single most important document in your client’s file. Their reasoning applies with special force to children. Under the evidence rules at 20 C.F.R. § 416.920c, SSA weighs medical opinions chiefly for supportability and consistency, so an opinion that explains itself and ties its conclusions to clinical findings carries the most weight. As the Goods put it, “The MSS is not a formality,” and without it a treating source’s knowledge “dies in the treatment record, untranslated and often unnoticed.”

That translation problem is acute in childhood claims. State agency reviewers complete Form SSA-538, the Childhood Disability Evaluation Form. A pediatrician, child psychiatrist, psychologist, or developmental specialist who has followed the child over time is far better placed to answer those questions, but will do so only if asked. A generic adult RFC form asks the wrong questions entirely: a toddler has no lifting capacity or off-task percentage to report.

To address this, we have prepared five Medical Source Statement templates for childhood SSI claims. They are attached to this article and are available to all readers as downloadable Microsoft Word files, so you can adapt them to your own practice. There is one template for each of the regulatory age groups: birth to age 1, ages 1 to 3, ages 3 to 6, ages 6 to 12, and ages 12 to 18. Each is built directly on the regulations so the physician is answering the questions the adjudicator must decide. Each form begins with plain-language instructions explaining that SSA compares the child with unimpaired same-age peers and that the physician should rate how the child would function without extra help, medication, or a structured setting. It sets out the regulatory definitions of “marked” and “extreme,” including the standard-deviation equivalents and, on the two forms for children under age three, the fraction-of-chronological-age measures.

A few practice points will make the forms more effective. Choose the template for the child’s age at the time the physician completes it, and consider a second statement if the child crosses into a new age group while the claim is pending. Send the form with a short cover letter that explains the request in plain terms, as the Goods recommend for adult cases, and emphasize that the explanations matter more than the checkmarks. Encourage the physician to check “unable to assess” rather than guess, since an unsupported rating invites an adjudicator to discount the whole statement. Finally, pair the MSS with school evidence, including a Teacher Questionnaire (SSA-5665-BK), IEPs, and Section 504 plans. A medical opinion that is consistent with what teachers observe in the classroom is hard to discount.

A word to the private bar

Zebley was won by legal services lawyers, and legal aid programs still carry much of the childhood SSI caseload. Their capacity is limited, however, and many families with disabled children never find a representative at all. Private practitioners can help close that gap, and NOSSCR encourages it members to take on childhood SSI cases, either pro bono or with the clear understanding that the fee may be modest or absent.

The economics are worth being candid about. SSI is not payable for any month before the month after the application is filed, so there is no retroactive period before filing to enlarge past-due benefits. Parental income and resources are deemed to the child, which can reduce the monthly payment. And under the fee agreement process, the fee is limited to 25 percent of past-due benefits, up to the current cap of $9,200, so in many childhood cases the fee will fall well below that cap. The return on these cases is measured in what the child gains: a monthly income that helps the family meet the costs of the disability; in most states, access to Medicaid; and, when back benefits are large, a dedicated account reserved for the child’s treatment and education.

Conclusion

The Zebley advocates established a principle that survived even the 1996 amendments: a child’s disability claim cannot be decided by checking a list. It must turn on how the impairment affects the child’s real-world functioning. Today that principle lives in the functional equivalence rules, the six domains, and the “whole child” approach. Those rules reward evidence that speaks their language. A detailed, age-appropriate Medical Source Statement from a treating source, supported by test results and consistent with school records, is the most direct way to put that evidence in front of the adjudicator. Getting that evidence right matters because of what the child stands to gain: income that helps the family meet the costs of the disability, a path to health coverage, and a measure of financial stability.

Social Security Rulings

Ruling	Title	Status
SSR 91-7c	Sullivan v. Zebley, 110 S. Ct. 885 (1990) (court-case ruling)	Publishes the Supreme Court’s decision; the “comparable severity” standard it construed was replaced by PRWORA in 1996
SSR 98-1p	Title XVI: Determining Medical Equivalence in Childhood Disability Claims When a Child Has Marked Limitations in Cognition and Speech	In force; some listing provisions it cites have since been revised
SSR 05-3p	Title XVI: Determining Continuing Disability at Step 2 of the Medical Improvement Review Standard Sequential Evaluation Process for Children Under Age 18 — Functional Equivalence	Rescinded; replaced by SSR 26-1p
SSR 09-1p	Title XVI: Determining Childhood Disability Under the Functional Equivalence Rule — The “Whole Child” Approach	In force
SSR 09-2p	Title XVI: Determining Childhood Disability — Documenting a Child’s Impairment-Related Limitations	In force
SSR 09-3p	Title XVI: Determining Childhood Disability — The Functional Equivalence Domain of “Acquiring and Using Information”	In force
SSR 09-4p	Title XVI: Determining Childhood Disability — The Functional Equivalence Domain of “Attending and Completing Tasks”	In force
SSR 09-5p	Title XVI: Determining Childhood Disability — “Interacting and Relating with Others”	In force
SSR 09-6p	Title XVI: Determining Childhood Disability — The Functional Equivalence Domain of “Moving About and Manipulating Objects”	In force
SSR 09-7p	Title XVI: Determining Childhood Disability — The Functional Equivalence Domain of “Caring for Yourself”	In force
SSR 09-8p	Title XVI: Determining Childhood Disability — The Functional Equivalence Domain of “Health and Physical Well-Being”	In force
SSR 17-2p	Titles II and XVI: Evidence Needed by Adjudicators at the Hearings and Appeals Council Levels of the Administrative Review Process to Make Findings about Medical Equivalence	In force; applies to adult and child claims
SSR 26-1p	Title XVI: Determining Continuing Disability at Steps 2 and 3 of the Medical Improvement Review Standard Sequential Evaluation Process for Children Under Age 18 — Functional Equivalence	In force from March 23, 2026
SSR 26-2p	Documenting and Evaluating Disability in Young Adults	In force from October 1, 2026; applies, with some exceptions, to age-18 redeterminations

Other Sources

• Sullivan v. Zebley, 493 U.S. 521 (1990) (Justia)
• Sullivan v. Zebley (1990) (Legal Aid History)
• HALLEX I-5-4-28, Sullivan v. Zebley (SSA)
• PRWORA at 30: SSI for Children with Disabilities, CRS Report R49011 (June 29, 2026)
• Neil H. Good and Shawn M. Good, The Medical Source Statement: Why It Remains the Single Most Important Document in Your Client’s File (NOSSCR Forum, September 2026)
• SSR 26-1p,  Title XVI: Determining Continuing Disability at Steps 2 and 3 of the Medical Improvement Review Standard Sequential Evaluation Process for Children Under Age 18 — Functional Equivalence (SSA)
• Benefits for Children with Disabilities, Pub. No. 05-10026 (SSA, 2026)

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