Definition - What does Medicaid mean?
Medicaid is a social health care program for individuals and families with low incomes and resources. Medicaid is a means-tested program that is jointly funded by state and federal governments and is managed by the states. Each state has broad leeway in determining who is eligible for Medicaid. States are not currently required to participate in the program although every state currently has a version of it in place.
Justipedia explains Medicaid
Medicaid was produced by the Social Security Amendments of 1965. These are the same Amendments that produced Title XIX to the previously existing Social Security Act. Medicaid was shaped as a program to support the states in providing medical treatment to low-income families and other similarly related persons who fulfill the necessary eligibility requirements. Although Medicaid programs are always managed by the state, the federal government oversees the state-run programs and institutes the requirements for subsidy, entitlement criteria, quality, and service distribution.