The disabilities covered by Social Security Disability Insurance include mental, neurological, immune system and congenital disorders. The SSDI program also covers disabling conditions that affect the respiratory, digestive, cardiovascular and musculoskeletal systems.
Individuals are eligible for SSDI benefits if they have disabling conditions that prevent them from acquiring or maintaining gainful employment. SSDI benefits are also available for children with disabilities that cause severe functional limitations. The Social Security Administration describes these conditions in the impairment listing manual. The manual lists permanent or fatal impairments that affect each major body system. Disability Determination Services available in each state determine whether individuals meet the criteria that SSA outlines for disability.
Part A of the listing of impairments outlines the medical criteria that apply to people above 18 years, while part B contains the disability criteria for individuals under 18 years. For children below 18 years, SSDI covers special conditions such as low birth weight, failure to thrive, malignant neoplastic diseases and genitourinary disorders. If a special disorder developed in childhood and only emerged in adulthood, an individual is still eligible for the SSDI benefits that fall under part A. Individuals with any of the listed disabilities must undergo an evaluation process to determine their eligibility for SSDI benefits.