Medicaid began in 1965 as part of the Social Security Act amendments

Medicaid was created on July 30, 1965, when President Lyndon B. Johnson signed amendments to the Social Security Act into law. The program launched officially on January 1, 1966. It was designed as a joint federal and state program to pay for medical care for people with low income, working alongside Medicare, which covered people age 65 and older regardless of income.

The program grew out of earlier state-run medical assistance programs that had existed since the 1950s, but Medicaid was the first nationwide framework that set federal standards while letting states design their own programs within those guidelines. This structure — federal funding with state administration — remains how Medicaid works today.

Key Takeaways

  • Medicaid was signed into law on July 30, 1965, and began covering people on January 1, 1966.
  • The program was created as a partnership between the federal government and individual states, with each state running its own program under federal rules.
  • Medicaid was part of the same legislative package that created Medicare, though the two programs serve different populations.
  • The original program covered only certain groups: people receiving cash assistance, the elderly poor, the blind, and people with disabilities.

Why Medicaid was created in 1965

Before Medicaid, many people with low income had no way to pay for hospital care, doctor visits, or prescriptions. States ran their own medical assistance programs, but coverage was inconsistent and often very limited. Some states offered almost nothing; others had more generous programs. A person could move across a state line and lose coverage entirely.

The federal government created Medicaid to establish a minimum standard of medical coverage across all states and to share the cost with states through federal matching funds. This allowed states with fewer resources to offer more coverage than they could have funded alone. The program reflected a policy decision that medical care for people in poverty should be a shared responsibility between state and federal government.

How Medicaid has changed since 1965

The original Medicaid program covered only four groups: people receiving cash assistance (Aid to Families with Dependent Children and Old Age Assistance), people who were blind, and people with disabilities. Over the decades, Congress expanded Medicaid to cover more people and more services.

In 1972, Medicaid began covering people with end-stage renal disease. In 1986, Congress required states to cover pregnant women and children in families with income up to a certain level. In 1997, the State Children's Health Insurance Program (CHIP) was created to cover children whose families earned too much for Medicaid but could not afford private insurance. The 2010 Affordable Care Act allowed states to expand Medicaid to cover all adults with income up to 138 percent of the federal poverty level, though states could choose whether to do so.

The services Medicaid covers have also expanded. The original program covered hospital care, doctor visits, and lab work. Today, Medicaid covers prescription drugs, mental health services, dental care, vision care, and long-term care in nursing homes — though the exact services vary by state.

The difference between Medicaid and Medicare

Medicaid and Medicare were created at the same time but serve different purposes. Medicare is a federal program that covers people age 65 and older, regardless of income, and some younger people with disabilities or end-stage renal disease. It is funded through payroll taxes and is the same in every state.

Medicaid is a program for people with low income of any age. It is jointly funded by federal and state money, and each state runs its own program with its own rules about who is covered and what services are included. A person can have both Medicare and Medicaid at the same time — this is called "dual may be able to access" status.

How states administer Medicaid differently

Although Medicaid is a federal program, each state has significant control over how it operates. States decide which groups of people to cover beyond the federal minimum, what services to include, how much to pay doctors and hospitals, and how to manage the program administratively. This is why Medicaid coverage and benefits can be very different depending on which state you live in.

For example, some states have expanded Medicaid to cover all adults with income up to 138 percent of the federal poverty level, while other states have not. Some states cover dental care for adults; others do not. Some states cover vision care; others limit it. A person who moves to a different state may find their Medicaid coverage changes or that they no longer may have access to.

Medicaid expansion and the Affordable Care Act

The 2010 Affordable Care Act included a major expansion of Medicaid. The law allowed states to expand coverage to all adults with income up to 138 percent of the federal poverty level, and the federal government agreed to pay 90 percent of the cost of covering these new people. However, the U.S. Supreme Court ruled in 2012 that states could choose whether to expand Medicaid or not.

As of now, some states have expanded Medicaid and others have not. This creates a gap: some people earn too much to may have access to for Medicaid under the original rules but do not earn enough to may have access to for tax credits to buy insurance on the health insurance marketplace. The rules about who qualifies for Medicaid vary significantly depending on your state.

Frequently Asked Questions

Was Medicaid the first health insurance program for low-income people?

No. States had medical assistance programs before 1965, but they were inconsistent and often very limited. Medicaid was the first nationwide program with federal standards and federal funding to help states cover people with low income.

Did Medicaid start on the same day as Medicare?

Both were signed into law on the same day in 1965, but they launched on the same date: January 1, 1966. They are separate programs serving different populations, though some people may have access to for both.

Has Medicaid always covered the same services?

No. The original program covered hospital care, doctor visits, and lab work. Over time, Congress and states added coverage for prescription drugs, mental health care, dental care, vision care, and long-term nursing home care. The exact services covered vary by state.

Can I move to a different state and keep my Medicaid coverage?

Your Medicaid coverage ends when you move. You will need to apply for Medicaid in your new state, and your coverage may be different because each state runs its own program with its own rules about who qualifies and what services are covered.