Final answer:
Medicare is the government program that provides medical care for the elderly and young with disabilities, complemented by Medicaid for low-income Americans. It was enacted in 1965 as a part of the Social Security Act.
Step-by-step explanation:
The government program that provides medical care for the elderly and young with disabilities is Medicare. Established by the Social Security Act of 1965 during Lyndon Johnson's administration, Medicare aims to cover medical expenses for individuals over the age of 65, as well as for certain younger individuals with disabilities. In addition to Medicare, Medicaid is another key program, which offers health care coverage to low-income Americans, including those who are elderly or disabled, by combining federal and state resources.
Other government health-care programs include the Veterans Health Administration, which serves military veterans; the Indian Health Service, which focuses on Native Americans; and the Children's Health Insurance Program (CHIP), which aids children in lower-income families.