There is an agency in every state that employs disability claims examiners who decide the disability claims for Social Security and Medicaid cases for all applicants of that state. In many states, the agency is called "Disability Determination Services," or DDS, but the agency goes by various names. For instance, Florida calls its agency the Division of Disability Determinations (DDD), California calls it the Disability Determination Service Division (DDSD), and Pennsylvania calls it the Bureau of Disability Determination (BDD). New York calls the agency Disability Determination Services (DDS). You can find the name and contact information for your state's disability agency by visiting our state-specific disability information pages.
The disability determination agency (we call it DDS on this website) is the state-level agency whose basic task is determining the eligibility of disability applicants (claimants) to receive monetary disability benefits or benefits from the state's adult Medicaid program. Examiners at DDS decides both Social Security Disability (SSD) claims and SSI (Supplemental Security Income) disability claims. DDS is where the question of medical eligibility for disability is resolved at both the initial application and reconsideration levels (the first level of appeal in most states except for New York, Pennsylvania, and a few others).
Typically, the vast majority of disability claims evaluated by DDS are denied, requiring disability claimants to have their cases heard by an administrative law judge at a disability hearing before they can be approved for benefits.
All states have at least one office for the disability determination agency and some states -- those that have chosen a "decentralized system" -- have several.
For more information, see our article on how decisions are made at the disability determination agency.