the most recent change to medicare was the medicare modernization act of 2003 which added
Medicare Prescription Drug, Improvement, and Modernization Act The MMA's most touted feature is the introduction of an entitlement benefit for prescription drugs, through tax breaks and subsidies.
History of Social Security in the United States Medicare and Medicaid were added in 1965 by the Social Security Act of 1965, part of President Lyndon B. Johnson's "Great Society" program.