Medicare vs. Medicaid: What’s the Difference, and Which One Covers You?
They sound alike, and the same federal agency runs both — but Medicare and Medicaid serve different people, charge very different prices and follow different rules. With Medicare open enrollment opening Oct. 15, here is how to tell the two programs apart.
Every fall, the same confusion lands in mailboxes across America. Medicare open enrollment opens Oct. 15, and millions of people — including many who are actually on Medicaid, or who qualify for both programs at once — are not sure which card in their wallet does what. The names differ by two letters. Almost everything else differs too.
The one-sentence difference
Medicare is federal health insurance earned mainly through work and age: if you are 65 or older, or younger with a qualifying disability, you are generally in. Medicaid is health coverage for people with limited income, run jointly by Washington and each state — and whether you qualify depends heavily on where you live.
Both programs are overseen by the Centers for Medicare & Medicaid Services, which is exactly why they get mixed up. But Medicare’s rules are the same in all 50 states, while Medicaid eligibility, benefits and even the program’s name change at the state line.
Who qualifies
Medicare covers more than 65 million people, most of them 65 and older. Most people are signed up automatically for Part A when they turn 65 if they are already receiving Social Security. Younger people can qualify after receiving disability benefits for two years, or immediately with end-stage renal disease or ALS. Your income does not matter — a retired executive and a retired janitor play by the same Medicare rules.
Medicaid covers more than 70 million people with limited income and resources: children, pregnant women, parents, seniors and people with disabilities. The Affordable Care Act let states expand Medicaid to most adults earning up to about 138 percent of the federal poverty level, and 40 states plus the District of Columbia have done so. In states that have not expanded, eligibility for adults can be far stricter.
| Medicare | Medicaid | |
|---|---|---|
| Run by | The federal government — same rules nationwide | Federal-state partnership — rules vary by state |
| Who qualifies | Age 65+, or younger with a qualifying disability | Limited income and resources; categories vary by state |
| What it costs you | Part A usually premium-free; Part B has a standard monthly premium ($185 in 2025) | Little or no premiums or copays, depending on the state |
| Coverage highlights | Hospital care, doctor visits, optional drug coverage (Part D) or private Medicare Advantage plans | Broad coverage that can include dental, vision and long-term care, varying by state |
| When to enroll | Around your 65th birthday; plan changes each year from Oct. 15 to Dec. 7 | Any time of year, through your state Medicaid agency |
What each one covers — and the long-term care gap
Medicare covers hospital stays (Part A), doctor visits and outpatient care (Part B), and prescription drugs through Part D or a bundled Medicare Advantage plan. What Medicare generally does not cover surprises many families: routine dental care, eye exams for glasses, hearing aids — and, critically, long-term custodial care in a nursing home once a short rehabilitative stay ends.
That gap is where Medicaid quietly becomes the country’s biggest long-term care payer. Medicaid covers nursing home care and many home- and community-based services for people who qualify, along with benefits Medicare skips, such as dental and vision care in many states. It is common for middle-class seniors to enter Medicaid only late in life, after spending down savings on care Medicare never covered.
Can you have both?
Yes — and about 12 million people do. “Dual eligibles” are enrolled in Medicare and also qualify for Medicaid, usually because of low income. For them, Medicare pays first as the primary insurer, and Medicaid helps with premiums, cost-sharing and extras like long-term care. If you think you might be in this group, it is worth checking: Medicaid can pay your monthly Part B premium, money many dual eligibles do not realize they can get back.
The verdict: which one applies to you
Turning 65, still working or retired with a work history? Medicare is your program. Mark the Oct. 15 to Dec. 7 window to review Part D or Medicare Advantage plans, because premiums and drug formularies change every year.
Low income, pregnant, caring for children, or living with a disability? Check Medicaid first — start with your state Medicaid agency or healthcare.gov, which routes applications automatically. There is no enrollment season; you can apply today.
65 or older and struggling with premiums or care costs? You may be a dual eligible. Applying for Medicaid on top of Medicare could cover your Part B premium and open the door to long-term care benefits.
One last rule of thumb: if the card came because of your age or disability, it is Medicare. If it came because of your income, it is Medicaid. And if your income is low enough, the right answer might be both.
Explainer based on program rules published by the Centers for Medicare & Medicaid Services (medicare.gov and medicaid.gov). Premium figures are for 2025 and are adjusted annually.
