The Core Difference Between Medicare and Medicaid
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-state program that covers people with low income, regardless of age. The two programs have different rules, different costs, and different coverage — and you may be covered by one, both, or neither.
The confusion is understandable: both are government health programs with similar names, both cover hospital and doctor visits, and both exist in every state. But they are run by different agencies, funded differently, and have opposite may be able to access rules. Understanding which one covers you matters because it changes what you pay, which doctors you can see, and what services are covered.
Key Takeaways
- Medicare is based on age (65+) or disability, funded by payroll taxes, and available to almost all older Americans regardless of income.
- Medicaid is based on income and assets, funded jointly by federal and state governments, and has different rules in each state.
- You can be covered by Medicare only, Medicaid only, or both at the same time (called "dual may be able to access").
- Medicare has four parts (A, B, D, and supplemental coverage), while Medicaid is a single program with state variation in what it covers.
- If you turn 65 and do not sign up for Medicare on time, you may face permanent penalties on your premiums.
Who Medicare Covers
You are covered by Medicare if you are 65 or older and a U.S. citizen or permanent resident who has lived in the country for at least five years. You do not have to be retired, and your income does not matter — a millionaire and someone living in poverty both get Medicare at 65 if they meet the age and residency rules.
You can also get Medicare before 65 if you have been receiving Social Security Disability Insurance (SSDI) for 24 months, or if you have end-stage renal disease or ALS. In those cases, age does not matter.
Medicare is automatic for most people: if you are already receiving Social Security at 65, you are enrolled in Medicare Part A and Part B without having to do anything. If you are not yet receiving Social Security, you must contact Social Security to enroll during your initial enrollment window, which begins three months before the month you turn 65.
Who Medicaid Covers
Medicaid covers people with low income and limited assets. The income and asset limits vary by state and by household size, and they change each year. In most states, a single person with income below 138% of the federal poverty line may be covered, but some states use lower thresholds. A few states have not expanded Medicaid at all, so coverage rules are stricter there.
Medicaid also covers people who are blind, disabled, or over 65 with low income, even if their income is slightly higher than the standard limit. Children and pregnant people have separate, often more generous, income limits in most states.
Unlike Medicare, you must actively explore for Medicaid. There is no automatic enrollment. You explore through your state's Medicaid office, usually online or by mail, and you must provide proof of income, residency, and citizenship. The process takes two to four weeks in most states.
What Each Program Pays For
| Service | Medicare | Medicaid |
|---|---|---|
| Hospital stays | Part A covers inpatient hospital care after you pay a deductible | Covers inpatient hospital care with little or no cost to you |
| Doctor visits | Part B covers 80% after you pay a deductible and monthly premium | Covers doctor visits with little or no cost to you |
| Prescription drugs | Part D covers drugs through a separate plan you choose | Covers most prescription drugs at low or no cost |
| Long-term care (nursing home) | Does not cover custodial care; only covers skilled nursing for up to 100 days after hospitalization | Covers long-term nursing home care if you meet income and asset limits |
| Home health care | Covers skilled nursing and therapy at home after hospitalization | Covers home health services with little or no cost to you |
| Dental, vision, hearing | Original Medicare does not cover these; supplemental plans may | Varies by state; some states cover all three, others cover none |
The biggest practical difference: Medicare requires you to pay deductibles, copays, and coinsurance. Medicaid typically has little or no cost-sharing. However, Medicaid does not cover long-term nursing home care in the way Medicare does — instead, Medicaid covers it indefinitely if you meet income and asset limits, but you must spend down your savings first.
If You Have Both Medicare and Medicaid
If your income is low enough to may have access to for Medicaid and you are 65 or older (or disabled and on Medicare), you are called dual may be able to access. Medicaid acts as a "wraparound" program: it pays the premiums, deductibles, and copays that Medicare does not cover.
Dual may be able to access people have the lowest out-of-pocket costs of any group. Medicaid pays your Medicare Part B premium (usually $164 to $560 per month depending on income), your Part A deductible (currently $1,632 per hospital stay), and most copays. You still need to choose a Part D drug plan, but Medicaid usually covers the premium.
To learn about you are dual may be able to access, contact your state Medicaid office or call 1-800-MEDICARE. Do not assume you are ineligible just because you receive Medicare — the income limits for dual may be able to access people are higher than for Medicaid alone.
What It Costs: Premiums, Deductibles, and Out-of-Pocket Limits
Medicare Part A (hospital insurance) has no monthly premium if you or your spouse paid Medicare taxes for at least 10 years. Part B (doctor visits) costs $164 to $560 per month in 2024, depending on your income. Part D (drugs) costs $5 to $100+ per month depending on which plan you choose. These amounts change each year.
Medicare also has deductibles: $1,632 per hospital stay for Part A, and $240 per year for Part B. You pay 20% of the cost of most doctor visits and outpatient services after you meet the Part B deductible. There is no annual out-of-pocket limit in original Medicare, which means costs can be very high if you have serious illness.
Medicaid has no monthly premium and usually no deductible. Some states charge small copays ($1 to $5 per doctor visit or prescription), but most do not. Medicaid has no annual out-of-pocket limit because costs are capped so low.
Enrollment important date and Penalties
Medicare has strict enrollment windows. Your initial enrollment period begins three months before the month you turn 65 and ends three months after. If you do not enroll during this window and you do not have other may have access to coverage, you pay a permanent 10% increase to your Part B premium for every year you were late. This penalty stays with you for life.
There are exceptions: if you are still working and covered by your employer's health plan, you can delay enrollment without penalty. If you are receiving SSDI, you are enrolled automatically at 65. If you miss the important date but have a may have access to life event (loss of employer coverage, move to a new state, divorce), you may have a special enrollment period to sign up without penalty.
Medicaid has no enrollment important date. You can explore at any time. However, coverage usually starts on the first day of the month you explore, not retroactively, so delaying costs you coverage time.
Frequently Asked Questions
Can I have Medicare and Medicaid at the same time?
Yes. If you are 65 or older and your income is low enough, you can be covered by both. Medicaid pays the costs Medicare does not cover. Contact your state Medicaid office to find out the income limit in your state.
Do I have to choose between Medicare and Medicaid?
No. If you are covered by both, you do not choose — you use both. Medicare is your primary insurance and Medicaid is secondary. Providers bill Medicare first, then Medicaid for what Medicare did not pay.
What happens if I turn 65 and do not sign up for Medicare?
If you do not enroll during your initial enrollment period and you do not have other may have access to coverage, you pay a permanent 10% increase to your Part B premium for each year you were late. This penalty is added to your premium for life, so delaying is expensive.
Does Medicaid cover nursing home care?
Yes, Medicaid covers long-term nursing home care if you meet your state's income and asset limits. You must spend down your savings to the limit first. Medicare covers only skilled nursing care for up to 100 days after hospitalization, not long-term custodial care.
How do I know which program I should explore for?
If you are 65 or older, you are covered by Medicare automatically or must enroll during your initial enrollment window — this is not optional. If your income is low, you should also check whether you are covered by Medicaid by contacting your state Medicaid office. You may be covered by both.