10.00 is one of the narrowest categories in the Blue Book. It contains essentially one substantive listing — non-mosaic Down syndrome. Other multi-system congenital disorders qualify by their effects on relevant body system listings, similar to how 9.00 endocrine cases work.
What 10.00 actually contains
- 10.06 — Non-mosaic Down syndrome
That’s it for direct sub-listings. The category is structured this way because most congenital disorders that affect multiple body systems are evaluated through the specific affected systems.
Listing 10.06 — Down syndrome
The pathway is straightforward. Documentation of non-mosaic Down syndrome (also called Trisomy 21) supported by chromosome analysis qualifies an adult claimant. The diagnosis itself meets the listing — SSA doesn’t require additional functional documentation for non-mosaic Down syndrome.
Mosaic Down syndrome (where only some cells have the extra chromosome 21) is evaluated under intellectual disability listings (12.05) and any specific body system involvement.
Other congenital disorders — how to think about them
Congenital disorders affecting multiple body systems are common, but most are evaluated under the body system listings that the disorder affects. Examples:
- Trisomy 18 (Edwards syndrome) — Evaluated through cardiac involvement (4.00), neurological (11.00), and other affected systems. Often on Compassionate Allowances list.
- Cri du Chat syndrome — Evaluated through intellectual disability (12.05) and other affected systems.
- Williams syndrome — Cardiovascular under 4.00, mental disorder under 12.00.
- Marfan syndrome — Cardiovascular (especially aortic involvement) under 4.10, musculoskeletal under 1.00.
- Ehlers-Danlos syndromes — Vascular involvement under 4.00, musculoskeletal under 1.00.
- Neurofibromatosis — Neurological under 11.00, possibly cancer (13.00) if tumors qualify.
- Tuberous sclerosis — Neurological (11.02 epilepsy), nephrological (6.00), other.
The combined-effects argument
When no single body system listing is clearly met, the strategy for congenital claimants is to document the combined effects of multiple impairments. SSA recognizes that two or more impairments, none individually meeting a listing, can together result in a functional capacity equivalent to a listed impairment.
This combined-effects analysis is more common in congenital cases than almost any other category because by definition these conditions affect multiple body systems.
What evidence wins these cases
For non-mosaic Down syndrome: chromosomal analysis or karyotype report. The diagnosis itself is the qualifier.
For other congenital disorders: comprehensive specialist records spanning each affected body system. Cardiology + neurology + GI + musculoskeletal as relevant. Pediatric or adult genetics consultation documenting the diagnosis. Detailed functional capacity statements that address each affected area.
Where these cases fall apart
For 10.06, very few cases fall apart — the chromosome confirmation is usually clear-cut. Where adults with Down syndrome have applied for SSI as children and aged onto SSDI, the transition sometimes involves administrative complications worth working through with an attorney.
For other congenital disorders, the most common gap is treating the condition as one diagnosis instead of building separate arguments for each body system. A Marfan claimant should have a cardiac argument AND a musculoskeletal argument AND any neurological involvement — each developed independently.
Compassionate Allowances
Many congenital conditions are fast-tracked: Trisomy 18, Patau syndrome, Lesch-Nyhan syndrome, infantile-onset Pompe disease, and others.
Free consultation
If you or a family member has a congenital condition affecting multiple body systems, a free 30-minute call helps map out which listings apply and which combined-effects arguments are strongest.
Official SSA reference: View Section 10.00 on ssa.gov →