High Quality Content by WIKIPEDIA articles! The Social Security Amendments of 1965 was legislation in the United States whose most important provisions resulted in creation of two programs: Medicare and Medicaid. The legislation initially provided federal health insurance for the elderly (over 65) and for poor families. While President Lyndon B. Johnson was responsible for signing the bill, there were many others involved in drafting the final bill that was introduced to the United States Congress in March 1965.