The effects of impairments may be different for children and adults.
Part A of the Listings contains medical criteria that apply to adults – claimants
age 18 and over.
Part B of the Listings contains medical criteria that apply to children only - claimants under age 18. We may use Part A for claimants under age 18 if the impairment
does not meet a Part B listing and the Part A criteria are appropriate.
DI 34001.001 - Listing of Impairments -- Purpose, Parts and Use