Medicare was created in 1965 to solve a specific, urgent problem: more than half of Americans over 65 had no hospital insurance, and medical bills were pushing retirees into poverty. Before Medicare, older adults faced a health insurance market that either refused to cover them or charged premiums they couldn’t afford on fixed incomes. The program was designed to close what Congress called “one of the major gaps in the economic security of the elderly.”
The Insurance Gap Facing Older Americans
By the early 1960s, about 70 percent of the general population had some form of hospital insurance. But among people 65 and older, fewer than half were covered. This wasn’t an accident. Private insurers had little financial incentive to cover the age group most likely to need expensive hospital care. Older Americans who could find coverage often paid far more than younger people for far less protection.
At the same time, retirees were living on shrinking incomes. Social Security checks were modest, pensions were uncommon, and savings eroded quickly when a spouse got sick. A single hospitalization could wipe out years of retirement savings. The result was a growing population of elderly Americans who either went without medical care or spent themselves into poverty paying for it.
Twenty Years of Failed Attempts
The idea didn’t appear overnight. In November 1945, President Harry Truman proposed a universal national health insurance program for all wage-earning Americans. His plan had five goals: building more hospitals, expanding public health services, funding medical research, reducing the cost of care for working people, and replacing wages lost to serious illness. Truman envisioned a system funded by monthly payroll contributions, similar to Social Security.
The proposal was fiercely opposed by the American Medical Association and conservative lawmakers who labeled it socialized medicine. It never passed. Over the next two decades, various bills tried to establish some form of health coverage for the elderly, each one stalling in Congress. The closest attempt before Medicare was the Kerr-Mills Act of 1960, which offered federal matching funds to states that provided medical assistance to low-income seniors. But participation was uneven. Many states never implemented the program fully, and Congress eventually concluded that Kerr-Mills was “inadequate to solve the problem.”
What Congress Set Out to Fix
The Social Security Amendments of 1965, signed into law by President Lyndon Johnson, created Medicare with a clear philosophy: government action should not wait until elderly people had already become destitute. Congress explicitly stated that it wanted to help older Americans before they became needy, not after. The goal was to make “economic security in old age more realistic, a more nearly attainable goal for most Americans.”
The legislation created two complementary programs. Part A, Hospital Insurance, covered inpatient hospital stays and was funded through payroll taxes, requiring no premium from beneficiaries. Part B, Medical Insurance, covered doctors’ visits, outpatient services, and diagnostic tests for a monthly premium of $3.00, typically deducted from Social Security checks. Enrollment was voluntary for Part B but automatic for Part A once a person turned 65.
Johnson signed the bill at the Truman Library in Independence, Missouri, a deliberate tribute to the man who had first proposed national health coverage two decades earlier. As he handed Truman the signing pens, Johnson called the former president “the real daddy of Medicare.” Truman and his wife Bess received the first two Medicare cards.
An Unexpected Role in Civil Rights
Medicare’s launch in July 1966 had a dramatic side effect that few anticipated: it became the most powerful tool for desegregating American hospitals. The Department of Health, Education, and Welfare established a rule requiring hospitals to comply with Title VI of the Civil Rights Act, which banned racial discrimination in federally funded programs, before they could receive Medicare payments. Any hospital that wanted access to the massive new flow of federal dollars had to desegregate its wards, waiting rooms, and staff.
At the time, 70 percent of hospitals in the South were segregated. Enforcing compliance required inspecting roughly 2,000 hospitals in a matter of months. More than 700 federal volunteers, community activists, hospital workers acting as informants, and even household staff who reported on their doctor employers participated in the effort. The result was one of the fastest and most sweeping desegregation campaigns in American history, accomplished not through court orders but through the financial leverage of a health insurance program.
From 19 Million to 70 Million
When Medicare launched, it covered approximately 19 million Americans. As of December 2025, enrollment stands at 69.9 million. The program has expanded well beyond its original scope. Congress added coverage for people under 65 with permanent disabilities in 1972, along with coverage for kidney failure requiring dialysis. A prescription drug benefit, Part D, was added in 2003. Medicare Advantage plans, which are privately administered alternatives to the original program, now enroll a large share of beneficiaries.
The core purpose, though, remains what it was in 1965: preventing medical costs from destroying the financial security of older and disabled Americans. Before Medicare, getting old in America meant facing the real possibility that a serious illness would leave you broke. The program didn’t eliminate every gap in coverage, but it fundamentally changed the relationship between aging and poverty in the United States.