What Is Medicaid and How Is It Different From Medicare?
Two government health programs share a similar name and almost nothing else — here is what actually separates them.
The question almost everyone asks first
If you've started searching what is Medicaid and how is it different from Medicare, you are far from alone — the two names are similar enough, and both are US government health coverage programs, that mixing them up is one of the most common points of confusion in the entire system. The short version: Medicaid is a joint federal-state program based mainly on income and household size, open to eligible people of any age. Medicare is a federal program based mainly on age (generally 65 and older) or certain disabilities, and it is not income-based at all. They are run by different rules, funded differently, and administered differently, even though both fall under the same federal agency, the Centers for Medicare & Medicaid Services (CMS).
Who actually runs each program
Medicare is a purely federal program. Its rules, premiums, and coverage categories are the same no matter which US state you live in. Medicaid is different: it is funded jointly by the federal government and each individual state, and states have significant control over their own program's income limits, covered services beyond a federal minimum, and how applications are processed. That is exactly why Medicaid eligibility varies so much depending on where you live, while Medicare eligibility does not.
Who each program is generally for
- Medicaid — primarily for people and households with limited income, including children, pregnant women, parents, people with disabilities, and, in states that adopted Medicaid expansion, most low-income adults regardless of whether they have children.
- Medicare — primarily for people age 65 and older, along with certain younger people with qualifying disabilities or specific conditions such as End-Stage Renal Disease.
Age and income are the two variables that separate the programs conceptually, but they are not mutually exclusive — a low-income senior can be eligible for both at the same time.
What each program actually covers
Medicare is typically split into parts: Part A generally covers hospital stays, Part B covers outpatient and doctor visits, and Part D covers prescription drugs, often with premiums, deductibles, and coinsurance attached to each part. Medicaid, by contrast, generally has little to no cost for most enrollees in most states, and its covered services are broader in some areas — long-term nursing home care, for instance, is generally not covered by Medicare beyond a short post-hospital stay, while Medicaid is the primary payer for long-term care for many Americans who need it.
What "dual eligible" actually means
Some people qualify for both Medicare and Medicaid at the same time — usually low-income seniors or people with disabilities who meet both programs' requirements. When this happens, Medicaid can help cover costs that Medicare doesn't, such as premiums, deductibles, and coinsurance, and in many cases long-term care. If you think you might be dual eligible, your state Medicaid agency can walk through exactly how the two programs would coordinate for your specific situation.
Why the confusion causes real problems
Beyond simple mix-ups in conversation, confusing the two programs leads to real mistakes: people assuming Medicare will cover a nursing home stay indefinitely when it generally won't, or assuming they're too old for Medicaid when age has nothing to do with Medicaid eligibility. Someone turning 65 does not automatically lose Medicaid eligibility, and someone under 65 with a low income is not automatically covered by Medicare. Each program has its own separate application and its own separate rules, even when a single household interacts with both.
How to apply to each program
Medicare enrollment generally happens through the Social Security Administration, often automatically around age 65 for people already receiving Social Security benefits, or manually during a specific enrollment window otherwise. Medicaid enrollment happens through your state Medicaid agency or through Healthcare.gov, which checks your household's information against Medicaid, CHIP, and marketplace eligibility in one application. See our guide on how Medicaid eligibility works by state for the details specific to income and household size.
What to do next
If you're not sure which program applies to your situation, start by asking two questions: are you 65 or older, or do you have a qualifying disability? And separately, is your household income limited relative to your state's Medicaid thresholds? The answers to those two questions, more than anything else, determine which program — or both — is worth applying to.
If you're helping a parent or older relative
Adult children often end up navigating this system on behalf of an aging parent, and the Medicare-Medicaid confusion is especially common here, because a parent can be automatically enrolled in Medicare at 65 while remaining completely unaware that they might also qualify for Medicaid assistance with premiums or long-term care costs. If your relative has limited savings and income, it is worth checking their state's Medicaid eligibility separately from their Medicare enrollment — the two systems will not automatically flag this for you.
A note on Medicare Advantage and Medicaid
Medicare Advantage (sometimes called Part C) is a private-insurer alternative to original Medicare, and it is a separate concept entirely from Medicaid, even though both terms get shortened to sound similar in conversation. Someone dual eligible for Medicare and Medicaid can still choose a Medicare Advantage plan; the two systems are not mutually exclusive, and confusing Medicare Advantage with Medicaid is another common source of misunderstanding worth avoiding when comparing coverage options.
Keeping the two programs straight going forward
A simple memory anchor that holds up in most conversations: Medicare is about age, Medicaid is about income. It's not a perfect rule — disability-based Medicare eligibility and state-specific Medicaid categories add nuance — but it resolves the vast majority of the confusion between the two names. From here, our guide on how Medicaid eligibility works by state is the natural next read if income and household size are what you're trying to work out.
How premiums and cost-sharing typically compare
Because Medicare is not income-based, most enrollees pay a standard Part B premium regardless of how much they earn, with higher earners paying more under an income-related adjustment, plus deductibles and coinsurance that apply the same way nationwide. Medicaid, by contrast, is built around affordability for low-income households, so premiums and cost-sharing are generally minimal or waived entirely in most states, with some states charging small copays for specific services like non-emergency prescriptions. This cost structure difference is one more reason the two programs feel so different in practice, even when a single household is navigating both at once.
Why long-term care coverage is where the difference matters most
One of the most consequential practical differences between Medicare and Medicaid shows up around long-term nursing home care. Medicare generally covers only a limited period of skilled nursing care following a qualifying hospital stay, typically capped at 100 days with cost-sharing kicking in well before that limit, and it does not cover custodial long-term care at all. Medicaid, on the other hand, is the primary payer for long-term nursing home care for a large share of Americans who need it, once a person meets both the program's income and asset limits for that specific category. Families are frequently surprised to learn Medicare will not continue paying for an extended nursing home stay, which is exactly why understanding Medicaid's separate, asset-tested long-term care eligibility rules matters well before a crisis arrives.
This is general information about US Medicaid, CHIP, and ACA marketplace programs, not personalized eligibility or legal advice. Rules vary by state and by individual circumstances — confirm current details with your state Medicaid agency or Healthcare.gov.