Overview
Medicare and Medicaid are two major U.S. health programs that serve different populations and follow different rules. Medicare is an age- and work-history–based federal program, while Medicaid is a need-based program administered by states with federal oversight. For a concise comparison of the programs and how they interact, see Understanding Medicare and Medicaid.
Key takeaways
- Medicare primarily serves people 65 and older and some younger people with disabilities; eligibility is based on work history, not income.
- Medicaid is income- and asset-based, varies by state, and often covers services Medicare does not fully cover.
- Some people qualify for both programs (dual eligibles), and the two programs coordinate benefits differently than private insurance.
How it works
Medicare is run at the federal level and is funded mostly through payroll taxes, premiums, and federal funding streams; it has parts that cover hospital care (Part A), medical services (Part B), and outpatient prescription drugs (Part D), plus private plan options (Part C or Medicare Advantage). For a deeper look at Medicare parts and how they compare with Medicaid and other coverage options, review Health insurance: Medicare vs. Medicaid, Medicare Parts C & D, and life insurance rate factors.
Medicaid is jointly funded by federal and state governments but administered by each state, so eligibility rules, covered services, and provider networks differ. States set income limits and program rules within federal minimums, and many states have expanded eligibility for adults under certain programs.
What it may cover (and what it may not)
Medicare typically covers hospital stays, physician services, preventive care, and certain outpatient services. It may not fully cover long-term custodial care, many dental and vision services, or some hearing aids without supplemental coverage.
Medicaid often covers a broader range of services for eligible people compared with Medicare, including long-term services and supports in many cases, comprehensive behavioral health services, and some home- and community-based supports. Exact benefits depend on state rules and specific eligibility categories.
Common mistakes to avoid
Assuming enrollment is automatic or identical in every state is a frequent error; Medicare enrollment rules are federal but have specific enrollment periods and potential penalties, while Medicaid requires state application and verification. Missing an enrollment window for Medicare Part B or Part D can lead to late-enrollment penalties.
Another mistake is expecting Medicaid benefits to match Medicare benefits; beneficiaries should confirm covered services and provider participation in their state. Also, people who appear eligible for both programs should check coordination rules so they don’t lose access to services or miss cost-sharing assistance.
Questions to ask an agent
Am I eligible for Medicare, Medicaid, or both, and how do those programs interact for someone in my situation?
What out-of-pocket costs, premiums, deductibles, and co-insurance should I expect under each program or plan option?
Does my current doctor accept the program(s) I may qualify for, and are there preferred provider networks I should consider?
Next steps
Gather recent income, asset, and work-history documents so you can determine eligibility for each program and avoid delays in enrollment.
Compare coverage gaps and supplemental options, such as Medigap or state wraparound services, and prepare a list of current medications and providers to check plan networks.
If you prefer guided help, you can talk to an agent to review your options and next steps with someone licensed in your state.
Frequently Asked Questions
Who is eligible for Medicare?
People 65 and older and certain younger people with qualifying disabilities or end-stage renal disease are eligible, generally based on work history and Medicare tax contributions.
How do Medicaid eligibility rules differ by state?
States set income and asset limits within federal guidelines, so covered services and eligibility thresholds can vary significantly from one state to another.
Can someone have both Medicare and Medicaid?
Yes; people who meet both programs' rules are called dual eligibles and often receive coordinated benefits with different cost-sharing rules.
Does Medicare cover long-term care or nursing home stays?
Medicare covers short-term skilled nursing and rehabilitation services but generally does not cover long-term custodial care; Medicaid may cover long-term services for eligible individuals.