The names invite confusion. The programs share little beyond a prefix.
Medicare is federal health insurance based on age or disability, uniform nationwide, with no income or asset test. Medicaid is health coverage for people with limited income and assets, run by states within federal rules, so eligibility and benefits vary by state.
The long-term care divide
The distinction matters most in one place: nursing homes. Medicare covers short skilled rehabilitation after a hospital stay, capped at 100 days and usually ending sooner. It does not pay for ongoing custodial care, the help with daily living that most long nursing home stays consist of. Medicaid does, and it is the largest payer of nursing home care in the country.
Qualifying for Medicaid long-term care means meeting strict income and asset limits, with rules protecting a spouse who remains at home. States apply a look-back period, five years in most, examining asset transfers; giving property away shortly before applying triggers a penalty period of ineligibility. Families facing likely care needs benefit from advice from an elder law attorney years before the need arrives, because the effective planning tools all require time.
What Medicaid covers that Medicare does not
Beyond long-term care, state Medicaid programs commonly cover services Medicare largely excludes: routine dental, vision and hearing care, non-emergency medical transportation, and personal care services at home. For someone eligible for both, that second set is often the practical difference between managing at home and not.
Home and community-based services waivers deserve particular attention. These state programs pay for care delivered at home, aides, adult day programs, respite for family caregivers, as an alternative to institutional care. They frequently have waiting lists, sometimes measured in years, which is the argument for applying early rather than at the point of crisis.
Dual eligibility
Millions of people qualify for both. For them, Medicare pays first and Medicaid picks up premiums, cost-sharing and services Medicare excludes. Medicare Savings Programs, a related set of benefits, pay Part B premiums for people above Medicaid limits but below higher thresholds, and are claimed by far fewer people than qualify. If income is modest, checking eligibility through the state Medicaid office is worth thirty minutes; the Part B premium alone is a meaningful monthly amount.
Applying
Medicare enrollment runs through Social Security. Medicaid runs through your state, with applications online, and eligibility rules published per state. Both are indexed from Medicaid.gov and Medicare.gov.