Medicaid is a type of health insurance, created alongside Medicare in the Social Security Amendments of 1965, that provides for those with limited incomes. Medicaid pays the health care providers directly for people who meet any of the following mandatory eligibilities: limited-income families with children; Supplemental Security Income recipients; newborns of Medicaid-eligible pregnant women; children under age 6 and pregnant women whose family income is at or below 133% of the Federal poverty level; recipients of adoption assistance and foster care; and certain people with Medicare. States also have the option of providing Medicaid to people in “Optional Eligibility Groups,” which share characteristics of the Mandatory Eligibility requirements but are less strictly defined.

Information on eligibility from the Centers for Medicare and Medicaid Services.