Dual eligibility means you qualify for both Medicare and Medicaid at the same time. This typically applies to people who are 65 or older (or have a qualifying disability) and also have a low income. About 12 million Americans fall into this category, and the overlap between the two programs can significantly reduce what you pay for healthcare, from monthly premiums and copays to long-term care costs that Medicare alone doesn’t cover.
Understanding how the two programs work together matters because the benefits you receive depend on which type of dual eligibility you have.
Full Benefit vs. Partial Benefit Dual Eligibility
Not all dual-eligible individuals get the same coverage. The distinction that matters most is whether you qualify for full or partial benefits.
Full-benefit dual eligibles receive the complete package of Medicaid benefits on top of their Medicare coverage. In practice, that means Medicare handles most preventive, primary, and acute care plus prescription drugs, while Medicaid picks up long-term services and supports (like nursing home care or home health aides), certain behavioral health services, and your Medicare premiums and cost sharing. This is the most comprehensive coverage available through these programs.
Partial-benefit dual eligibles are enrolled in Medicare plus one of the Medicare Savings Programs, which help with specific Medicare costs like premiums, deductibles, or coinsurance. They do not receive the full range of Medicaid-covered services. The savings are real but more limited.
Medicare Savings Programs and Income Limits
If you don’t qualify for full Medicaid but still have limited income, you may qualify for one of four Medicare Savings Programs. Each covers a different slice of your Medicare costs, and the income thresholds rise as the benefits narrow.
- Qualified Medicare Beneficiary (QMB): Covers your Part A and Part B premiums, deductibles, coinsurance, and copayments. Income limit for an individual is $1,350 per month; $1,824 for a married couple. Resource limit is $9,950 individual, $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, $2,184 for a couple. Same resource limits as QMB.
- Qualifying Individual (QI): Also covers the Part B premium. Income limit is $1,816 per month individual, $2,455 couple. Same resource limits.
- Qualified Disabled and Working Individual (QDWI): Covers the Part A premium for people with disabilities who lost premium-free Part A when they returned to work. Resource limits are lower: $4,000 individual, $6,000 couple.
These are 2026 federal standards. Your state Medicaid office determines eligibility using these thresholds, and some states apply slightly more generous rules. You apply through your state Medicaid agency, not through Medicare.
How the Two Programs Pay Your Bills
When you have both Medicare and Medicaid, they don’t split your bills evenly. Medicare always pays first. It covers what it would normally cover for any Medicare beneficiary, then sends any remaining costs to Medicaid. Medicaid never pays before Medicare, and it only pays after Medicare, any employer group health plan, and any Medigap supplemental insurance have processed the claim.
For full-benefit dual eligibles, this layered system often means you owe little or nothing out of pocket. Medicare covers the bulk of your doctor visits, hospital stays, and prescriptions. Medicaid then wraps around to cover the deductibles and copays Medicare left behind, plus services Medicare doesn’t offer at all, like extended nursing home stays or personal care assistance at home.
Prescription Drug Savings
Dual-eligible individuals automatically qualify for Medicare’s Extra Help program (also called the Low-Income Subsidy), which dramatically lowers prescription drug costs. You don’t need to apply separately. If you have full Medicaid coverage, participate in a Medicare Savings Program, or receive Supplemental Security Income, Medicare will mail you a notice confirming your eligibility.
With Extra Help in 2025, you pay $0 for your Medicare drug plan premium and deductible. Copays are capped at $4.90 for each generic drug and $12.15 for each brand-name drug. Once your total out-of-pocket drug costs reach $2,000 for the year, you pay nothing for covered medications for the rest of the year. For people managing multiple chronic conditions, this benefit alone can save thousands of dollars annually.
Dual Special Needs Plans
Dual Special Needs Plans (D-SNPs) are a type of Medicare Advantage plan designed specifically for people with both Medicare and Medicaid. They coordinate benefits from both programs under a single plan, which can simplify what is otherwise a confusing two-system setup. Instead of managing separate Medicare and Medicaid cards, providers, and rules, a D-SNP aims to bring everything under one roof.
D-SNPs vary by state and by plan. Some offer zero-dollar Medicare cost sharing, meaning you pay nothing for Medicare-covered services. Others have low but nonzero copays. Each D-SNP must specify which dual-eligibility categories it serves, whether that’s full-benefit duals only, QMB-only individuals, or a broader mix. Before enrolling, check which category the plan accepts and what it covers in your state.
Switching Plans Is Easier for Dual Eligibles
Most Medicare beneficiaries can only change plans during the Annual Enrollment Period in the fall or under limited circumstances. Dual-eligible individuals have far more flexibility. Starting January 1, 2025, two new special enrollment periods replaced the old quarterly option.
The first allows any dual-eligible or Extra Help-eligible person to switch to Original Medicare with a standalone prescription drug plan, or switch between standalone drug plans, once per month throughout the year. The second, called the integrated care special enrollment period, lets full-benefit dual eligibles enroll in a fully integrated D-SNP once per month, provided the plan aligns with their Medicaid managed care organization. This monthly flexibility means you’re not locked into a plan that isn’t working for you.
Who Qualifies and How to Apply
To be dual eligible, you need to meet the requirements for both programs independently. For Medicare, that means being 65 or older, or having a qualifying disability or end-stage renal disease. For Medicaid, you need to meet your state’s income and resource limits. The population is diverse: it includes people with multiple chronic conditions, physical disabilities, mental illness, and cognitive impairments like dementia, as well as people who are relatively healthy but simply have low incomes.
Medicare enrollment typically happens through Social Security, either automatically when you turn 65 and already receive benefits, or by signing up during your initial enrollment period. Medicaid enrollment happens through your state Medicaid agency. If you already have Medicare and think you might qualify for Medicaid or a Medicare Savings Program, contact your state Medicaid office or your local State Health Insurance Assistance Program (SHIP) for help with the application. Because Medicaid rules vary by state, the income thresholds for full Medicaid eligibility can differ significantly from the federal minimums listed for the Medicare Savings Programs above.
If you’re approved for both, the coordination between programs begins automatically. Your Extra Help for prescriptions kicks in without a separate application, and you become eligible for D-SNPs and the monthly special enrollment periods that give you ongoing flexibility to adjust your coverage.