If you qualify for both Medicare and Medicaid, the two programs work together to significantly reduce your healthcare costs. Medicare acts as your primary insurance, paying first for covered services, and Medicaid steps in to cover remaining costs, fill gaps in Medicare coverage, and in many cases eliminate your out-of-pocket expenses entirely. About 12 million Americans have both programs simultaneously, a status known as “dual eligibility.”
Which Program Pays First
Medicare always pays first for any service it covers. Medicaid never pays first for those services. After Medicare processes a claim, Medicaid may pick up whatever Medicare didn’t cover: deductibles, copayments, and coinsurance. In practice, this means you often owe nothing out of pocket for doctor visits, hospital stays, and other services that both programs recognize.
For services that only Medicaid covers, like long-term nursing home care or personal care assistance at home, Medicaid pays on its own. This is one of the biggest advantages of dual eligibility, since Medicare has strict limits on nursing facility stays (typically 100 days after a qualifying hospital admission) and doesn’t cover custodial care at all. Medicaid fills that gap for people who need months or years of daily support.
What Dual Eligibility Covers
Having both programs gives you broader coverage than either one alone. Medicare handles hospital care, doctor visits, outpatient procedures, and prescription drugs through Part D. Medicaid adds services Medicare typically excludes: long-term nursing home stays, personal care services, dental care, vision, hearing aids, and transportation to medical appointments (though exact benefits vary by state).
Medicaid also helps pay for Medicare itself. Depending on your income level, your state may cover your Part B premium ($185 per month in 2025), your Part A premium if you have one, and your Medicare deductibles and coinsurance. This layered coverage is why dual-eligible individuals often have the lowest out-of-pocket costs of any group in the U.S. healthcare system.
Medicare Savings Programs
Even if you don’t qualify for full Medicaid benefits, you may qualify for a Medicare Savings Program that helps cover your Medicare costs. These programs have different income thresholds, all based on 2026 limits:
- Qualified Medicare Beneficiary (QMB): Covers your Part A and Part B premiums, deductibles, coinsurance, and copayments. You qualify with a monthly income up to $1,350 for an individual or $1,824 for a married couple, and resources under $9,950 (individual) or $14,910 (couple).
- Specified Low-Income Medicare Beneficiary (SLMB): Covers your Part B premium only. Income limit is $1,616 per month for an individual or $2,184 for a couple, with the same resource limits.
- Qualifying Individual (QI): Also covers your Part B premium. Income limit is $1,816 per month for an individual or $2,455 for a couple.
The QMB program comes with a particularly important protection: federal law prohibits all Medicare providers from billing you for any Part A or Part B cost sharing. This applies whether or not the provider participates in Medicaid, and whether or not Medicaid actually pays them anything. If a provider tries to bill you for a copay or deductible while you’re enrolled in QMB, they’re violating their Medicare agreement.
Prescription Drug Savings
If you have full Medicaid coverage, participate in a Medicare Savings Program, or receive Supplemental Security Income, you automatically qualify for Medicare’s Extra Help program (also called the Low Income Subsidy). This dramatically reduces your prescription drug costs under Part D.
With Extra Help in 2025, you pay no premium and no deductible for your Part D drug plan. Your copays drop to $4.90 or less for generic drugs and $12.15 or less for brand-name drugs. Once your total out-of-pocket drug spending reaches $2,000 for the year, you pay nothing for covered prescriptions for the rest of that year. You don’t need to apply separately if you’re already dual-eligible; the enrollment is automatic.
Dual Special Needs Plans
If managing two separate programs sounds complicated, Dual Eligible Special Needs Plans (D-SNPs) exist specifically to simplify things. These are Medicare Advantage plans designed for people who have both Medicare and Medicaid. They bundle your Medicare and Medicaid benefits into a single plan with one card, one provider network, and a care coordinator who helps you navigate the system.
D-SNPs often include extra benefits beyond standard Medicare Advantage, such as dental, vision, hearing, meal delivery after a hospital stay, and transportation to appointments. The specific benefits and eligibility categories vary by state, since states set their own rules about which categories of dual-eligible individuals can enroll. You can search for available D-SNPs in your area through Medicare’s plan finder during open enrollment.
How States Handle Coordination Differently
Because Medicaid is jointly run by the federal government and individual states, the way your two programs work together depends partly on where you live. Some states deliver Medicaid services on a fee-for-service basis, paying providers directly for each visit or procedure. Others use managed care plans, where a private company or local authority receives a monthly payment per enrollee and coordinates all Medicaid-covered services.
A few states have developed more integrated models. Washington, for example, uses a managed fee-for-service system where designated “health homes” receive payments from the state Medicaid agency to coordinate care for dual-eligible individuals. These organizations provide care management, help with transitions between hospitals and home, and connect people to community and social services. The goal across all these models is to prevent the fragmentation that happens when two entirely separate programs cover the same person.
Qualifying for Medicaid When You’re on Medicare
To add Medicaid to your existing Medicare coverage, you apply through your state’s Medicaid office (not through Medicare or Social Security). Each state sets its own income and resource limits, residency requirements, and application procedures. You’ll typically need to provide proof of income, bank statements, information about any other assets, and documentation of your Medicare enrollment.
If your income is slightly too high for your state’s standard Medicaid limit, you may still qualify through a process called “spend down.” This works similarly to a deductible: you subtract your medical expenses, including Medicare premiums, deductibles, and copayments, from your countable income. If the remaining amount falls at or below your state’s threshold, you become eligible for Medicaid for that period. States set their own budget periods for spend-down, ranging from one month to six months. In a one-month budget period, you need to meet your spend-down each month. In a longer budget period, your income and expenses are calculated over the full period, which can make it easier to qualify.
The expenses you can count toward your spend-down include health insurance premiums and enrollment fees, copayments and deductibles, and costs for medical services your state recognizes but that aren’t covered by your Medicaid plan. For specifics on your state’s income limits and spend-down rules, contact your state Medicaid office directly, as these numbers vary significantly from state to state.