The Core Difference: Who Pays and Who Gets It

Medicare is a federal insurance program you pay into during your working years through payroll taxes. You become covered at 65, regardless of income. Medicaid is a joint federal and state program that pays for medical care for people with low income, at any age.

Think of Medicare as something you've already bought through taxes. Medicaid is a safety net based on how much money you have right now. One is tied to age and work history. The other is tied to income and assets. You can have both at the same time — this is called "dual coverage" — but they work differently and cover different things.

Key Takeaways

  • Medicare covers people 65 and older, and some younger people with disabilities or end-stage renal disease, paid for through payroll taxes you paid while working.
  • Medicaid covers people with low income and limited assets, at any age, and is funded by both federal and state money.
  • Medicare has the same rules nationwide; Medicaid rules vary by state, so coverage in one state may not exist in another.
  • You can be on both programs at once, and when you are, Medicaid often pays Medicare premiums and covers costs Medicare does not.
  • Income limits for Medicaid vary widely by state and family size, and assets matter — having too much in savings can disqualify you.

How You Become Covered: Age, Work History, or Income

You get Medicare at 65 if you or your spouse paid Medicare taxes for at least 10 years (40 quarters) while working. You don't have to be retired. You don't have to be poor. If you worked and paid in, you're covered.

You get Medicaid based on your current income and assets. Each state sets its own income limit — in some states a single person earning $1,500 a month may not may have access to; in others, the limit is higher. Some states also count how much money you have in the bank. If your income is low enough and your savings are below the state limit, you can begin the process to see if you meet your state's rules.

You can also get Medicaid before 65 if you're disabled, blind, or have end-stage renal disease — and some states cover pregnant people and children regardless of disability status. Medicare covers some of these groups too, but the rules are different.

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 insurer.

Medicaid covers doctor visits, hospital care, and prescription drugs — but what else it covers depends on your state. Some states cover dental and vision; others don't. Some cover mental health and substance abuse treatment more broadly than Medicare does. Some cover long-term care in a nursing home; others have strict limits. You need to know what your specific state's Medicaid program covers.

Both programs have gaps. Medicare doesn't cover dental, vision, or hearing aids (though some Part C plans do). Medicaid's coverage varies by state. If you have both, Medicaid often fills in some of Medicare's gaps — it may pay your Medicare premiums, cover the costs Medicare doesn't, or cover services Medicare doesn't offer.

Cost to You: Premiums, Deductibles, and Copays

Medicare Part A is free if you paid in during your working years. Part B costs a monthly premium (the standard amount in 2024 is $164.90, but it varies by income). Part D (prescription drug coverage) has a monthly premium that varies by plan. You also pay a deductible before coverage kicks in, and copays or coinsurance when you use services.

Medicaid is free or very low cost. You may pay a small copay for a doctor visit or prescription, but most Medicaid programs charge little to nothing. Income-based Medicaid programs don't charge premiums. However, some states have work requirements or other conditions you must meet to stay covered.

If you're on both Medicare and Medicaid, Medicaid typically pays your Medicare premiums and covers your deductibles and copays. This is why dual coverage can be valuable — it reduces what comes out of your pocket.

State Rules: Why Medicaid Varies Where You Live

Medicare is the same everywhere. If you're 65 and covered, you get the same benefits in Maine as in California. Medicaid is not. Each state designs its own program within federal guidelines, sets its own income limits, decides what services to cover, and determines how much to pay doctors and hospitals.

This means a person earning $1,200 a month might be covered by Medicaid in one state and not in another. A service covered in one state — like dental work or therapy — may not be covered in yours. If you move states, you may lose Medicaid coverage or gain it, depending on the new state's rules.

Some states expanded Medicaid in 2014 to cover more working-age adults; others did not. This created a gap: people who earn too much for traditional Medicaid but too little to afford Medicare premiums without help. Knowing your state's specific rules matters.

How to Know Which One You're On

If you're 65 or older and worked in the United States, you're probably on Medicare. You'll have a red, white, and blue Medicare card. You may also be on Medicaid if your income is low enough for your state.

If you're under 65 and have low income, you may be on Medicaid only. If you're disabled and under 65, you may be on Medicare (after a waiting period) or Medicaid, or both.

The easiest way to know for certain is to look at your insurance card or call your state's Medicaid office. You can also call 1-800-MEDICARE to confirm your Medicare status. If you're unsure whether you're covered by Medicaid, your state's Medicaid agency can tell you — the phone number is on your state's health department website.

When You Might Have Both Programs

You can be on Medicare and Medicaid at the same time. This happens when you're 65 or older (or disabled and on Medicare) and your income is low enough for Medicaid. People in this situation are called "dual may be able to access."

When you have both, Medicare is your primary insurance — it pays first. Medicaid is secondary — it covers what Medicare doesn't. In practice, Medicaid often pays your Medicare premiums, covers your deductibles and copays, and pays for services Medicare doesn't cover, like dental or long-term care (depending on your state).

If you think you might be may be able to access for Medicaid while on Medicare, contact your state's Medicaid office. Income limits are usually higher for people already on Medicare, and the process is simpler than explore from scratch.

Frequently Asked Questions

Can I have Medicare and Medicaid at the same time?

Yes. If you're 65 or older and on Medicare, and your income is low enough, you can also be on Medicaid. Medicaid will pay some or all of your Medicare costs and cover services Medicare doesn't. Contact your state's Medicaid office to see if you meet the income limits.

What if I'm under 65 and have no insurance?

You may be covered by Medicaid if your income is low enough for your state. You cannot get Medicare until 65 unless you're disabled, blind, or have end-stage renal disease. Contact your state's Medicaid office or call 211 to find out what programs you may be able to use.

Do I have to pay back Medicaid if I get more money later?

No. Medicaid is not a loan. However, some states can recover costs from your estate after you die, and Medicaid can place a lien on your home in certain situations involving long-term care. The rules vary by state — ask your state's Medicaid office about recovery rules in your area.

If I move to a different state, what happens to my coverage?

Medicare coverage moves with you — you're covered the same way in every state. Medicaid does not. You'll need to explore for Medicaid in your new state, and the income limits and covered services may be different. Contact your new state's Medicaid office as soon as you move.

Why does Medicaid coverage vary so much by state?

Medicaid is jointly funded and run by federal and state governments. States have flexibility to set income limits, choose which services to cover, and decide how much to pay providers. This means each state's program is different. The federal government sets minimum standards, but states can do more.