The Developmental Disabilities Administration (DDA) is a division of the Department of Social and Health Services (DSHS) that assists persons with developmental disabilities and their families obtain services and support based on individual preferences, capabilities, and needs.  People served by the DDA live in the community, in residential habilitation centers, and in institutional settings.

Eligibility for DDA services depends on whether a person has a qualified developmental disability, has a functional need, and meets income and asset standards.  The services provided are designed to promote everyday activities, routines, and relationships common to most people, and include housing, medical care, personal care, and job training.

To qualify for DDA services, a person must have an intellectual disability, cerebral palsy, epilepsy, autism, or another neurological or other condition similar to an intellectual disability or require treatment similar to that required for individuals with intellectual disabilities.  The disability must have originated before the person turned eighteen, be expected to continue indefinitely, and result in substantial limitations.

The DDA may not use intelligence quotient (IQ) scores as the sole determinant of developmental disability.

Beginning July 1, 2025, the DDA may not use IQ scores for determining an individual has a developmental disability.  Individuals determined eligible for DDA services under criteria in place prior to July 1, 2025, must maintain their eligibility for services.