Don Irvin Wortman was a U.S. federal government administrator who served 27 years in senior-level executive positions in many federal government agencies. He was Acting Commissioner of the Social Security Administration (SSA) from December 13, 1977, to October 4, 1978. In early 1977, while working at the Department of Health, Education and Welfare (HEW)—precursor to the Department of Health and Human Services—he was Chairman of the task force for implementing the reorganization of HEW. This reorganization included the merging of the Medicare and Medicaid programs into a new agency; this agency was named the Health Care Financing Administration. He became the first Administrator of the Health Care Financing Administration. On two occasions—6 months in 1975 and the first 3 months of 1977—he was Acting Administrator of the Social and Rehabilitation Services, the agency which, at that time, administered the Medicaid program and the Aid to Families with Dependent Children program.