Medicare and Medicaid are both government health insurance programs, but they work differently and cover different groups of people

Medicare is social insurance — you or your spouse paid into it through payroll taxes during your working years, and you receive benefits based on those contributions. Medicaid is a needs-based program funded by federal and state taxes; you do not pay into it during work, and you receive it based on income and assets, not on past contributions.

The key difference is how they are funded and who qualifies. Medicare works like a pension or insurance policy you have earned. Medicaid works like a safety net for people with low income, regardless of work history. Both are run by the federal government, but Medicaid is jointly funded and administered with each state, so the rules vary by where you live.

Key Takeaways

  • Medicare is social insurance funded by payroll taxes you paid during work; Medicaid is a needs-based program funded by general taxes and available to people with low income.
  • Medicare covers most people at age 65 and some younger people with disabilities or end-stage renal disease; Medicaid covers low-income adults, children, pregnant people, and seniors in every state but with different income limits.
  • Medicare has the same rules nationwide; Medicaid rules, income limits, and covered services vary significantly by state.
  • You can have both Medicare and Medicaid at the same time — this combination is called "dual may be able to access" and is common for low-income seniors.

How Medicare Works as Social Insurance

Medicare is social insurance because it is based on a social contract: you pay into the system while working, and the system pays you back when you retire or become disabled. The money you and your employer paid in Social Security and Medicare taxes (1.45% each, or 2.9% if self-employed) goes into a trust fund. When you turn 65 or may have access to through disability, you draw from that fund.

You do not need to be poor to receive Medicare. A wealthy retiree with a million dollars in the bank still gets Medicare at 65 because they paid into it. The program does not means-test you — it does not check your income or assets. This is the defining feature of social insurance: the benefit is tied to your contribution history, not your current need.

Medicare has four parts: Part A (hospital care), Part B (doctor visits and outpatient care), Part D (prescription drugs), and Part C (an alternative private insurance option). The rules are the same in every state. If you move from Florida to Oregon, your coverage does not change.

How Medicaid Works as a Needs-Based Program

Medicaid is not social insurance. You do not pay into Medicaid during your working years and then draw it back. Instead, Medicaid is funded by general tax revenue and is available to people whose income and assets fall below a certain threshold. The federal government sets a baseline, but each state can set its own income limits and decide which groups to cover.

This means Medicaid rules are different in every state. In one state, a single adult with income up to 138% of the federal poverty line may may have access to; in another state, the limit might be 100% of poverty, or the state might not cover single adults without disabilities at all. A person who qualifies for Medicaid in New York might not may have access to in Texas. The covered services also vary — one state might cover dental care, another might not.

Medicaid covers low-income children, pregnant people, parents, seniors, and people with disabilities. Unlike Medicare, it does check your income and assets. If you earn too much or own too much, you do not may have access to, even if you have no health insurance and no other way to pay for care.

Who Qualifies for Each Program

Medicare is available to anyone age 65 or older who is a U.S. citizen or permanent resident and has worked at least 10 years in jobs covered by Social Security. You do not have to be retired — you can still be working and get Medicare at 65. Some people under 65 also may have access to: those who have received Social Security Disability Insurance (SSDI) for 24 months, those with end-stage renal disease, and those with ALS (amyotrophic lateral sclerosis).

Medicaid is available to low-income people in all 50 states, but the income limits and covered groups differ. All states must cover children up to age 19, pregnant people, and people receiving Supplemental Security Income (SSI). Many states also cover low-income adults without children, but not all — and the income threshold varies widely. Some states expanded Medicaid to cover adults earning up to 138% of the federal poverty line; others have not.

You can have both Medicare and Medicaid. This happens when someone is 65 or older (or qualifies for Medicare through disability) and also has income low enough to may have access to for Medicaid. These people are called "dual may be able to access." Medicaid then pays some of Medicare's costs, such as premiums and copays, and covers services Medicare does not, such as long-term care.

How Funding Differs Between the Two Programs

Medicare is funded by payroll taxes — the 2.9% Medicare tax that comes out of your paycheck and your employer's contribution. This money goes into the Medicare Hospital Insurance Trust Fund and the Supplementary Medical Insurance Trust Fund. Because the funding is tied to work history, Medicare is considered social insurance, similar to Social Security.

Medicaid is funded by federal and state general revenue — income taxes, sales taxes, and other tax sources. The federal government pays a share (usually 50% to 75%, depending on the state's wealth), and the state pays the rest. Because funding comes from general taxes and is not tied to individual contributions, Medicaid is considered a welfare or information program.

This funding difference has real consequences. Medicare is the same everywhere because it is entirely federal. Medicaid varies by state because states have some control over how much they spend and who they cover. When a state faces a budget crisis, it may cut Medicaid services or tighten income limits. Medicare cannot be cut in the same way — it is a federal entitlement.

What Each Program Covers

Medicare Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health care. Part B covers doctor visits, outpatient surgery, diagnostic tests, and preventive care. Part D covers prescription drugs. Part C (Medicare Advantage) is a private insurance option that covers everything Parts A and B cover, usually with lower out-of-pocket costs but a smaller network of doctors.

Medicare does not cover long-term care (nursing home or assisted living for non-medical reasons), dental care, vision care, or hearing aids, though some Medicare Advantage plans offer these as add-ons. You pay a monthly premium for Part B and Part D, and you pay copays and deductibles when you use care.

Medicaid covers a broader range of services than Medicare, including long-term care, dental, vision, and hearing — but only in states that choose to cover them. All states must cover hospital care, doctor visits, and emergency services. Many states cover prescription drugs, mental health care, and substance use treatment. The exact coverage depends on your state and your category (child, adult, senior, or person with disability).

When You Might Have Both Programs

If you are 65 or older and your income is low enough to may have access to for Medicaid, you will have both. This is common for seniors who worked but did not earn much, or who spent down their savings on medical care or long-term care. Medicaid then acts as a "wraparound" — it pays Medicare premiums and copays, and it covers services Medicare does not, such as nursing home care.

To may have access to for Medicaid as a senior, your income must be below your state's limit (usually around the federal poverty line or slightly higher) and your assets must be below a threshold (usually $2,000 to $3,000 for an individual, though this varies by state). If you own a home, it is usually not counted as an asset for Medicaid purposes, but other savings, investments, and property are.

Having both programs simplifies some things — Medicaid covers costs Medicare does not — but it also means dealing with two separate systems. When you receive care, you may need to tell the provider you have both, so they bill correctly.

Frequently Asked Questions

Can I turn down Medicare and keep only Medicaid?

If you are 65 or older, you are generally required to enroll in Medicare Part A when you turn 65, even if you have Medicaid. If you do not enroll, you may face a penalty when you do enroll later. However, you can decline Part B (doctor coverage) if you have other insurance, though this is rare for people on Medicaid.

Do I pay premiums for Medicaid like I do for Medicare?

Most people do not pay a monthly premium for Medicaid — it is free. Some states charge small premiums or copays for certain services, but these are usually waived for people with very low income. Medicare, by contrast, charges a monthly premium for Part B and Part D.

If I move to a different state, does my Medicaid coverage move with me?

No. Medicaid is state-based, so when you move, your old coverage ends and you must explore for Medicaid in your new state. The income limits and covered services may be different. You should explore before your old coverage ends to avoid a gap.

Is Medicare considered welfare?

No. Medicare is social insurance, not welfare. You earned it by paying taxes during work. Medicaid is a needs-based program and is sometimes called welfare, though the term is outdated. Both are government programs, but they work on different principles.

What happens to my Medicare if I go back to work after 65?

Your Medicare continues. You do not lose coverage if you work. You will still pay the monthly Part B premium (unless your income is very high, in which case you pay a higher premium), and you will still pay copays and deductibles when you use care.