Medicare was established in 1965 under President Lyndon B. Johnson to provide federal health insurance for Americans aged 65 and older and those with disabilities. It is administered by the U.S. Department of Health and Human Services and funded through payroll taxes, income taxes paid on Social Security benefits, and premiums paid by enrollees. While there was some controversy around its creation, Medicare now covers all Americans aged 65 and older and participation by all 50 states.