The Core Difference: Who Pays and Who Gets Coverage

Medicare is a federal insurance program you pay into through payroll taxes during your working years. You become covered at 65, regardless of income. Medicaid is a joint federal and state program that covers people with low income, at any age. The biggest difference: Medicare is based on age or disability status; Medicaid is based on how much money you have.

Think of it this way. If you worked and paid taxes, Medicare is your earned benefit — the government holds your place in the program until you turn 65. Medicaid is a safety net for people whose income falls below their state's threshold right now. You can have both programs at the same time, and many seniors do.

The programs also work differently day to day. Medicare has the same rules nationwide. Medicaid rules change from state to state — what your neighbor pays for a doctor visit in one state might be free in another. This matters because it means you cannot assume what Medicaid covers where you live without checking your own state's program.

Key Takeaways

  • Medicare is for people 65 and older or some younger people with disabilities, paid through taxes you contributed during work.
  • Medicaid is for people with low income at any age, and the income limits and coverage rules vary by state.
  • You can be on both Medicare and Medicaid at the same time, which is called being "dual may be able to access."
  • Medicare has the same cost-sharing and coverage rules everywhere; Medicaid costs and what it covers depend on which state you live in.
  • If you are on Medicare and your income drops, you may become Medicaid-may be able to access and should report the change to your state program.

How You Pay Into Each Program

Medicare is funded by payroll taxes. When you worked, you and your employer each paid 1.45% of your wages into Medicare. Self-employed people paid 2.9%. These taxes went into a federal trust fund. At 65, you draw from that fund — you do not have to prove you need it or that you cannot afford private insurance.

Medicaid is funded differently. The federal government sets a baseline, but each state decides how much to contribute and who qualifies. Some states are more generous with income limits; others are stricter. Some states expanded Medicaid in 2014 to cover more working-age adults; others did not. This is why a person with the same income might may have access to in one state and not in another.

You do not pay into Medicaid through payroll taxes. Instead, it is funded by general tax revenue. You do not have to have worked to may have access to. You only have to meet your state's income and asset limits at the time you explore.

Who Is Covered and When

Medicare covers almost everyone at 65. You are automatically enrolled if you are receiving Social Security. If you are not yet receiving it, you can sign up during your birthday month. The only people who do not get Medicare at 65 are those who have not worked long enough to may have access to — you generally need 40 quarters of work (10 years) to be covered.

Medicaid covers people whose income is below a certain threshold. That threshold varies by state and by family size. In some states, a single person earning $1,500 a month might may have access to; in others, the limit is higher or lower. Some states also count assets — if you have more than a certain amount in savings or property, you may not may have access to, even if your monthly income is low.

Age does not matter for Medicaid. A 30-year-old and an 80-year-old can both be covered if they meet the income rules. This is different from Medicare, which is primarily an age-based program.

What Each Program Covers

Medicare has four parts. Part A covers hospital stays, skilled nursing care, and hospice. Part B covers doctor visits, outpatient care, and some preventive services. Part D covers prescription drugs. Part C (Medicare Advantage) is an alternative way to get Parts A, B, and D through a private insurance company.

Medicare does not cover long-term care in a nursing home, dental work, hearing aids, or most vision care. It also does not cover prescription drugs unless you enroll in Part D. You have to pay out of pocket for these things, or buy a supplemental insurance policy (called Medigap) to help cover the gaps.

Medicaid covers more. It must cover hospital care, doctor visits, and some preventive services in every state. But each state can add coverage for things Medicare does not — dental, vision, hearing aids, and long-term nursing home care. Some states cover these things; others do not. This is one reason Medicaid can be more valuable than Medicare for certain needs, even though it is a program for people with low income.

Cost-Sharing: What You Pay at the Doctor

Medicare requires you to pay part of the cost. You pay a deductible before coverage starts, then a copay or coinsurance for each service. For example, Part B has a yearly deductible, then you pay 20% of the cost of most services. Part A has a deductible per hospital stay. These costs add up, which is why many people buy Medigap insurance to cover them.

Medicaid cost-sharing varies by state. Some states charge nothing — no copay, no deductible. Others charge small copays for doctor visits or prescriptions. A few charge deductibles. The state decides. This means your out-of-pocket costs on Medicaid depend entirely on where you live.

If you are on both Medicare and Medicaid (dual may be able to access), Medicaid usually pays the cost-sharing that Medicare requires. This is one reason dual coverage can be valuable — you get Medicare's broad coverage and Medicaid's help paying for it.

When You Might Have Both Programs

You can be on Medicare and Medicaid at the same time. This happens most often when a senior's income drops — through a spouse's death, a reduction in pension, or a change in living situation. If your income falls below your state's Medicaid limit, you can explore for Medicaid while keeping Medicare.

States call people on both programs "dual may be able to access." If you are dual may be able to access, Medicaid becomes your secondary insurance. It pays what Medicare does not cover and helps with Medicare's cost-sharing. This can mean lower out-of-pocket costs and coverage for services Medicare does not offer, like dental or long-term care.

To become Medicaid-may be able to access while on Medicare, you report your income change to your state's Medicaid office. The process and timeline vary by state. Some states process applications in weeks; others take longer. If your income has dropped, it is worth checking whether you may have access to — the difference in your costs can be significant.

How to Find Out What Your State Covers

Because Medicaid rules are set by each state, you need to check your own state's program to know what you are covered for and what you pay. Your state's Medicaid office has this information. You can find it by searching "[Your State] Medicaid" online, or by calling your state's health department.

Medicare information is the same everywhere. You can call Medicare directly at 1-800-MEDICARE (1-800-633-4227) or visit Medicare.gov. They can tell you what your coverage is, what you owe, and whether you may have access to for programs that help pay your costs.

If you are on both programs, your state Medicaid office is usually the best place to start with questions about what is covered. They know how the two programs work together in your state.

Questions to Ask Your Doctor or Insurance Company

Before a procedure or service, ask whether it is covered under your Medicare plan or your state's Medicaid program. Ask what you will owe out of pocket. If you are on both programs, ask which one will be billed first. Ask whether you need a referral or prior approval. These details change depending on your specific coverage, so it is worth confirming before you receive care.

If you are thinking about explore for Medicaid, ask your doctor's office whether they accept Medicaid in your state. Not all providers do. Knowing this before you explore helps you decide whether Medicaid will work for your care.

Frequently Asked Questions

Can I have Medicare and Medicaid at the same time?

Yes. If you are 65 or older and on Medicare, and your income drops below your state's Medicaid limit, you can explore for Medicaid. When you have both, Medicaid helps pay the costs that Medicare does not cover. Many states have programs specifically for people who are dual may be able to access.

Why does Medicaid coverage change from state to state?

Medicaid is run jointly by the federal government and each state. The federal government sets minimum coverage requirements, but each state decides what else to cover and how much to pay providers. This is why dental coverage, vision care, and long-term care are covered in some states but not others.

What happens to my Medicare if I become Medicaid-may be able to access?

Nothing. You keep Medicare. Medicaid becomes your secondary insurance and helps pay costs that Medicare does not cover. You stay enrolled in both programs. If your income goes back up and you no longer may have access to for Medicaid, you keep Medicare.

Do I have to pay for Medicare if I am on Medicaid?

If you are 65 or older, you pay Medicare premiums (usually taken from your Social Security check) even if you are on Medicaid. However, if your income is very low, Medicaid may pay your Medicare premiums for you. Ask your state Medicaid office whether you may have access to for this help.

How do I know if I may have access to for Medicaid?

Contact your state's Medicaid office or call 211 to be connected to local resources. They will ask about your income and assets and tell you whether you may have access to in your state. Income limits vary widely, so it is worth checking even if you think you earn too much.