Medicare vs. Medicaid: What's the Difference?
Medicare and Medicaid are two separate government health programs that are frequently confused — even by people who are enrolled in one or both. Here's the clear breakdown: what each covers, who qualifies, how they differ, and how approximately 12 million Americans qualify for both at the same time.
The One-Line Difference
Medicare
Federal health insurance for people 65 and older (and some younger people with disabilities or ESRD). Based on age and work history — not income.
Medicaid
Joint federal-state health coverage for people with low income. Based on income and assets — not age. Rules and benefits vary by state.
Side-by-Side Comparison
| Feature | Medicare | Medicaid |
|---|---|---|
| Who runs it | Federal government (CMS) | Joint: federal + each state |
| Primary eligibility | Age 65+ with work history; under 65 with SSDI/ESRD/ALS | Low income; eligibility varies by state |
| Based on income? | No (IRMAA surcharges apply for high income) | Yes — primary eligibility criterion |
| Based on age? | Yes — primarily age 65+ | No age requirement |
| Monthly premium | $185/month for Part B (2025); Part A free for most | $0 in most states for qualifying enrollees |
| Deductibles & copays | Yes — Part A: $1,676/benefit period; Part B: $257/year + 20% | Very low or $0 for most services |
| Doctor choice | Any Medicare-participating provider nationwide | Limited to Medicaid-accepting providers (varies by state) |
| Dental coverage | Not covered (some MA plans add limited dental) | Often covered; varies by state |
| Vision coverage | Limited (no routine exams or glasses) | Often covered; varies by state |
| Long-term care / nursing home | Very limited (SNF up to 100 days) | Major coverage for nursing home care (after spend-down) |
| Prescription drugs | Part D (separate plan); $2,000 OOP cap | Covered; usually very low or no cost |
| Who administers | Social Security (enrollment); CMS (benefits) | State Medicaid agency |
| How to apply | SSA.gov or 1-800-772-1213 | Your state Medicaid agency or Benefits.gov |
Key Differences Explained
1. Eligibility: Age vs. Income
Medicare is primarily an age-based entitlement. If you're 65+ and have worked and paid Medicare taxes for at least 10 years (40 quarters), you qualify — regardless of how much money you have. A millionaire and someone living in poverty are both eligible at 65.
Medicaid is an income-based program. Eligibility is determined by comparing your income (and in most states, your assets) to the Federal Poverty Level. In 2025, the FPL for a single individual is $15,650/year. Most states cover adults with incomes up to 138% FPL (~$21,597/year) under the ACA Medicaid expansion, though rules vary significantly.
2. Coverage: Federal Standard vs. State Variation
Medicare benefits are standardized nationally. Part A, Part B, Part C, and Part D work the same way in Alabama as in California. Costs differ by plan choice but the rules are federal.
Medicaid benefits vary enormously by state. The federal government sets minimum requirements, but states can expand coverage significantly. Some states cover extensive dental, vision, hearing, and long-term care services. Others cover only the federal minimums. This is why you must look up your specific state's Medicaid program.
3. Long-Term Care: Medicaid's Major Advantage
This is the most practically important difference for seniors: Medicare does not cover long-term custodial care (ongoing help with daily activities in a nursing home or assisted living). Medicare covers skilled nursing for up to 100 days after a qualifying hospital stay — but that's rehabilitation, not ongoing custodial care.
Medicaid is the primary payer for long-term nursing home care in the U.S., covering over 60% of all nursing home residents. However, to qualify for Medicaid long-term care coverage, you typically must spend down your assets to very low levels (the rules are complex and vary by state). This is a critical planning issue for seniors approaching the need for nursing home care.
4. Who Provides Care
With Medicare, you can see any of the more than 1 million providers who accept Medicare nationwide — with no referrals needed under Original Medicare.
With Medicaid, you're limited to providers who accept Medicaid. Medicaid reimbursement rates are lower than Medicare, leading many doctors and specialists to opt out of Medicaid. Access to specialty care can be more limited under Medicaid than under Medicare.
Dual Eligibility: Having Both Medicare and Medicaid
Approximately 12 million Americans qualify for both Medicare and Medicaid simultaneously. These "dual eligible" beneficiaries are among the most vulnerable in the healthcare system — typically older, lower-income, and often with multiple chronic conditions.
How Dual Coverage Works
When you have both Medicare and Medicaid:
- Medicare pays first (as primary insurer) for covered services
- Medicaid pays second (as secondary insurer), often covering the cost-sharing Medicare leaves behind — deductibles, copays, and coinsurance
- For many dual eligibles, the combined coverage means near-zero out-of-pocket costs for healthcare
Medicare Savings Programs: A Bridge for Near-Dual Eligibles
Even if you don't fully qualify for Medicaid, you may qualify for a Medicare Savings Program (MSP) — a Medicaid-funded program that pays some or all of your Medicare costs:
| Program | What It Pays | 2025 Income Limit (Individual) |
|---|---|---|
| QMB (Qualified Medicare Beneficiary) | Part A & B premiums + all cost-sharing | ~$1,325/month |
| SLMB (Specified Low-Income Medicare Beneficiary) | Part B premium only ($185/month) | ~$1,585/month |
| QI (Qualifying Individual) | Part B premium only | ~$1,782/month |
| QDWI (Qualified Disabled & Working Individuals) | Part A premium | ~$4,615/month |
QMB enrollment automatically qualifies you for Extra Help (Low Income Subsidy) for Part D, reducing or eliminating drug costs. Use our MSP Eligibility Checker to see if you qualify.
Dual-Eligible Special Needs Plans (D-SNPs)
If you have both Medicare and Medicaid, you may be eligible for a Dual-Eligible Special Needs Plan (D-SNP) — a type of Medicare Advantage plan designed specifically for dual eligibles. D-SNPs typically offer:
- $0 premium (and sometimes Part B premium buyback)
- Heavily subsidized cost-sharing or $0 copays
- Integrated Medicare and Medicaid benefits management
- Care coordination and case management
- Extra benefits like transportation, meals, OTC allowances
D-SNPs are available in most states. Check Medicare.gov Plan Compare for D-SNP options in your ZIP code.
Common Scenarios
| Situation | Which Program? | What to Do |
|---|---|---|
| Turning 65, middle income | Medicare only | Enroll in Medicare A+B; add Part D and Medigap |
| Turning 65, very low income | Both Medicare + Medicaid | Enroll in Medicare; apply for Medicaid; look for D-SNP |
| Under 65, on SSDI for 24 months | Medicare (disability pathway) | Medicare starts automatically; may also qualify for Medicaid |
| 65+, modest income, not quite Medicaid-eligible | Medicare + possible MSP | Apply for QMB/SLMB/QI; check for Extra Help eligibility |
| 65+, facing nursing home care | Medicare short-term; Medicaid long-term | Medicare covers up to 100 SNF days; Medicaid for ongoing care after spend-down |
| Any age, ESRD (kidney failure) | Medicare immediately | Medicare eligibility regardless of age; Medicaid may also apply |
Frequently Asked Questions
Yes. About 12 million Americans have both. They're called "dual eligible" beneficiaries. Medicare pays first for covered services; Medicaid pays second, often covering the cost-sharing that Medicare leaves behind. Dual eligibles automatically qualify for Extra Help (LIS) for Part D and may qualify for D-SNP plans with comprehensive combined benefits.
Yes — this is Medicaid's most important role for seniors. Medicare covers skilled nursing for up to 100 days after a qualifying hospital stay. After that, Medicare stops paying. Medicaid covers ongoing custodial nursing home care indefinitely, but you must meet income and asset limits (which vary by state). Many people spend down their assets over time before qualifying for Medicaid nursing home coverage.
Medicare Savings Programs are Medicaid-funded programs that help low-income Medicare beneficiaries pay Medicare premiums and cost-sharing. The QMB program is the most comprehensive — it pays both Part A and Part B premiums plus all Medicare cost-sharing. Even if you don't qualify for full Medicaid, you may qualify for an MSP. About $4 billion in MSP benefits go unclaimed every year because eligible people don't apply.
Not entirely. Most people pay $0 for Part A (if they worked 40+ quarters). Part B costs $185/month in 2025 (more if your income is higher due to IRMAA surcharges). Part D premiums vary by plan. You also pay deductibles and coinsurance when you use healthcare. Medicaid, on the other hand, typically has no premiums and very low or no cost-sharing for qualifying enrollees.
Find Out If You Qualify for Extra Help
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MSP Eligibility Checker 2025 Medicare Costs