Medicare began in 1965 as a federal health insurance program for people 65 and older

President Lyndon B. Johnson signed Medicare into law on July 30, 1965. The program started on July 1, 1966. At that time, about half of all Americans over 65 had no health insurance at all, and many seniors chose between paying for medical care and paying for food or housing.

Medicare was created as Title XVIII of the Social Security Act. It was designed to provide hospital insurance and medical insurance to seniors regardless of income or medical history. The program grew out of decades of debate about whether the federal government should may provide health coverage for older Americans.

When Medicare launched, it covered about 19 million people. Today it covers more than 66 million Americans — not just seniors, but also some younger people with disabilities and people with end-stage renal disease.

Key Takeaways

  • Medicare was signed into law in 1965 and began covering seniors on July 1, 1966.
  • The program was created because roughly half of Americans over 65 had no health insurance before Medicare existed.
  • Original Medicare included hospital insurance (Part A) and medical insurance (Part B), with prescription drug coverage added much later in 2006.
  • Medicare is funded through payroll taxes, premiums, and general federal revenue, not through a separate process process for each person.

What Medicare covered when it first started

Original Medicare had two parts from the beginning. Part A covered hospital stays, skilled nursing facility care, hospice, and some home health services. Part B covered doctor visits, outpatient care, medical equipment, and other services.

What Medicare did not cover in 1966 was prescription drugs. Seniors had to pay the full cost of medications out of pocket. This gap in coverage remained for 40 years until Congress added Part D (prescription drug coverage) in 2006.

Medicare also did not cover dental care, vision care, or hearing aids when it started, and these remain uncovered today under Original Medicare. Some seniors bought supplemental insurance, called Medigap, to fill these gaps.

Why Congress created Medicare in the 1960s

Before 1966, seniors faced a stark choice. Medical costs were rising, but most older Americans lived on fixed incomes from Social Security. Insurance companies often refused to sell policies to people over 65 because they were seen as too expensive to insure.

Surveys from the early 1960s showed that many seniors delayed or skipped medical care because they could not afford it. Hospital bills could wipe out a lifetime of savings. President Johnson and Congress decided that the federal government should may provide basic coverage rather than leave seniors uninsured.

The debate was fierce. The American Medical Association opposed Medicare, arguing it was government overreach. But the program passed with bipartisan support, and doctors quickly began accepting Medicare patients once it launched.

How Medicare changed after 1965

Medicare has expanded several times since its creation. In 1972, Congress extended coverage to people under 65 who had been on disability for two years or more, and to people with end-stage renal disease. These groups remain covered today.

In 2003, Congress added Part D, which provides prescription drug coverage. This was the first major expansion of benefits in decades. Part D began in 2006 and is run partly by private insurance companies under contract with Medicare.

In 1997, Congress created Part C, also called Medicare Advantage. This allows seniors to receive their Medicare benefits through private insurance plans instead of Original Medicare. Medicare Advantage plans often include prescription drug coverage and may cover dental or vision care, though they come with different rules and networks.

How Medicare is funded

Medicare is funded through several sources. Workers and employers each pay a payroll tax of 1.45% of wages into the Medicare Hospital Insurance Trust Fund (Part A). This tax has been in place since Medicare began and is separate from Social Security taxes.

Part B (doctor and outpatient services) is funded through monthly premiums that beneficiaries pay, plus general federal income tax revenue. Part D (prescription drugs) is funded through beneficiary premiums and federal payments to insurance companies.

Because Medicare is funded through payroll taxes and federal revenue rather than individual applications, everyone who reaches 65 and has worked in the United States for at least 10 years becomes may be able to access automatically. There is no means test and no medical underwriting.

Who could get Medicare when it started versus today

In 1966, Medicare was available only to people 65 and older. Today, three groups can receive Medicare before age 65: people who have been on Social Security Disability Insurance (SSDI) for at least two years, people with end-stage renal disease, and people with amyotrophic lateral sclerosis (ALS).

When Medicare began, it covered about 19 million people. The program grew as the population aged and as may be able to access expanded. By 2020, Medicare covered more than 62 million people. That number continues to grow as baby boomers reach 65.

Enrollment in Medicare Advantage (Part C) has grown dramatically since it became available in 1997. Today, roughly 4 in 10 Medicare beneficiaries choose Medicare Advantage instead of Original Medicare, though this varies by region and plan availability.

What seniors should know about Medicare's history

Understanding when and why Medicare was created can help you understand how it works today. Medicare was built on the principle that seniors should not face medical bankruptcy, and that principle still guides the program.

The program has changed over time — new parts have been added, rules have shifted, and private insurance companies now play a larger role than they did in 1966. But the core idea remains: Medicare provides health coverage to seniors and certain younger people with disabilities, funded through payroll taxes rather than individual applications.

If you are approaching 65 or already on Medicare, knowing this history can help you understand why certain benefits are covered and others are not, and why Medicare works the way it does.

Frequently Asked Questions

Did Medicare exist before 1965?

No. Before 1965, there was no federal health insurance program for seniors. Some states had programs for very poor elderly people, and some seniors had private insurance, but most had no coverage at all. Medicare was the first time the federal government may provide health insurance to a broad group of Americans.

Why did it take so long for the United States to create Medicare?

The debate over government health insurance lasted decades. Opponents argued it was too expensive and represented government overreach. Supporters pointed to rising medical costs and the fact that insurance companies would not cover seniors. The political climate finally shifted in the 1960s, allowing Congress to pass the program with bipartisan support.

Has Medicare always covered prescription drugs?

No. Prescription drug coverage (Part D) was not added until 2006, 40 years after Medicare began. Before that, seniors paid the full cost of medications out of pocket. Even today, Part D coverage has gaps and limits that seniors need to understand.

Can someone who did not work in the United States still get Medicare at 65?

Generally, you need at least 10 years of work history in the United States (40 quarters of coverage) to receive Medicare Part A without paying a premium. Spouses and ex-spouses may be able to use a partner's work history. If you do not meet this requirement, you can still purchase Part B and Part D, but Part A will have a higher premium.

Is Medicare the same as Medicaid?

No. Medicare is a federal program for seniors and some younger people with disabilities, funded through payroll taxes. Medicaid is a joint federal and state program for low-income people of any age. They are separate programs with different rules, funding, and may be able to access requirements.