What It Means to Have Medicare and Medicaid at the Same Time

Some people hold both Medicare and Medicaid coverage at the same time. These individuals are often called "dual-eligible" beneficiaries. This situation happens when a person meets the requirements for both programs, even though they operate differently and come from different government sources.

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Medicare is a federal health insurance program primarily for people age 65 and older, regardless of income. It also covers some younger people with disabilities and those with end-stage renal disease. Medicaid is a joint federal and state program that provides health coverage based mainly on income level. Income limits vary by state, but Medicaid generally serves people with lower incomes and limited resources.

When someone has both programs, Medicare is typically the primary payer, meaning it pays first for covered services. Medicaid then acts as a secondary payer, covering some costs that Medicare does not pay, such as copayments, coinsurance, and deductibles. This arrangement can significantly reduce out-of-pocket costs for the person covered.

According to data from the Centers for Medicare and Medicaid Services (CMS), approximately 12 million people in the United States have both Medicare and Medicaid coverage. This represents about 19% of all Medicare beneficiaries. The number of dual-eligible individuals has remained relatively stable over the past several years, though it varies by state.

Understanding dual coverage requires knowing how each program works independently and then how they interact when held together. The rules about what each program pays, when it pays, and how much it pays can be complex. However, for someone managing healthcare costs on a limited income, having both programs can provide important financial protection.

Practical Takeaway: Dual eligibility means having Medicare as the primary insurer and Medicaid as secondary coverage. This structure typically results in lower out-of-pocket costs for the person covered, making it an important resource for lower-income seniors and disabled individuals.

How Medicare and Medicaid Work Together in Payment

When a person with both Medicare and Medicaid receives healthcare services, the two programs coordinate their payments. Understanding this coordination process helps explain how costs are divided and why having both programs matters financially.

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Here is how the payment process typically works: When you receive a covered service, Medicare reviews the claim first and determines what it will pay based on its coverage rules and rates. For example, if Medicare covers a doctor's office visit and determines its approved amount is $100, Medicare pays its share according to the plan you have. If you have Original Medicare (Part A and Part B), you pay a copayment or coinsurance amount. If you have a Medicare Advantage plan, your out-of-pocket costs follow that plan's structure.

After Medicare processes the claim, information about what Medicare paid and what you still owe goes to Medicaid. Medicaid then reviews whether it covers that service and whether it will pay your remaining costs. In many cases, Medicaid will pay copayments and coinsurance that Medicare does not cover. However, Medicaid will only pay amounts that Medicaid itself would have paid if Medicare were not involved. This is called "Medicaid's liability rule," and it prevents Medicaid from paying more than its normal payment amount.

Different types of services may have different payment patterns. For hospital stays, Medicare Part A typically covers the bulk of inpatient hospital costs after you meet a deductible. Medicaid can then cover that deductible and any copayment amounts. For prescription drugs, if you have Medicare Part D, that plan pays first, and Medicaid may help with any remaining out-of-pocket costs if you are a Medicaid member in a state that provides such support.

Some services may be covered by one program but not the other. For instance, long-term care services like nursing facility care or home and community-based services may be covered primarily by Medicaid in many states, even if you have Medicare. In these situations, you may need to understand each program's separate rules.

Practical Takeaway: Medicare pays first when you have both programs, and Medicaid typically covers some or all of your remaining out-of-pocket costs. Knowing how this coordination works helps you understand your actual cost when you receive services.

Who Can Have Both Medicare and Medicaid

Dual eligibility is not automatic. A person must meet the requirements for both programs separately. Understanding who tends to have both programs helps clarify whether this situation might apply to you or someone you know.

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The most common group of dual-eligible beneficiaries includes people age 65 and older with low incomes and limited resources. Many are seniors who have modest Social Security income and minimal savings. They automatically qualify for Medicare when they turn 65, and if their income and resources fall below their state's Medicaid limits, they may also be eligible for Medicaid.

Younger people with disabilities represent another significant group. If you receive Social Security Disability Insurance (SSDI) or Supplemental Security Income (SSI), you may have both programs. People on SSDI become eligible for Medicare after receiving disability benefits for 24 months. Those on SSI often qualify for Medicaid immediately. If your income is low enough to remain on SSI while also receiving SSDI, you could be dual-eligible.

People with end-stage renal disease who need dialysis or a kidney transplant represent another population that may have both programs. Medicare covers people with this condition regardless of age, and those with low incomes may also qualify for Medicaid.

Income and resource limits for Medicaid vary significantly by state. In 2024, the federal poverty level for an individual was approximately $15,060 per year. Most states set their Medicaid income limits somewhat above this level for seniors, though some states are more restrictive. Resource limits also vary but typically allow people to have modest savings and still qualify—often ranging from $2,000 to $8,000 depending on the state and category of Medicaid.

Some people become dual-eligible through changes in their circumstances. For example, someone might have only Medicare for years, then lose a job or receive a pension reduction that lowers their income enough to meet Medicaid requirements. Others might have Medicaid as a younger person and then add Medicare when they turn 65.

Practical Takeaway: Seniors with low incomes, younger people with disabilities receiving SSI or SSDI, and people with specific conditions like end-stage renal disease are the main groups with both Medicare and Medicaid. Your state's income and resource limits determine whether you can have Medicaid alongside Medicare.

What Services and Costs Are Covered Under Dual Eligibility

Having both Medicare and Medicaid typically provides broader coverage and lower costs than having Medicare alone. However, understanding what is covered requires looking at what each program pays for and how they interact.

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Medicare Part A covers inpatient hospital care, skilled nursing facility care (for a limited time after hospitalization), home health services, and hospice care. When you have Medicaid as well, Medicaid often covers the hospital deductible ($1,556 in 2024) and any copayment amounts that Medicare requires. For skilled nursing facilities, Medicare covers the first 20 days fully and days 21-100 with a copayment per day ($194 per day in 2024). Medicaid typically covers this copayment for dual-eligible beneficiaries.

Medicare Part B covers doctor visits, outpatient care, and other medical services. It requires a monthly premium (averaging $175 in 2024) and has a deductible ($240 in 2024). After you meet the deductible, you typically pay 20% of the cost of covered services. For dual-eligible beneficiaries, Medicaid often covers the Part B premium, deductible, and coinsurance amounts.

Prescription drug coverage through Medicare Part D (or Part D coverage within a Medicare Advantage plan) requires a separate premium. Dual-eligible individuals may receive assistance with Part D costs through Medicaid, depending on their state's policies. Medicaid may cover prescription drugs that Medicare does not cover, and it may cover additional quantities or refills.

Long-term care services represent an important coverage area where Medicaid plays a major role for dual-eligible beneficiaries. Medicare generally does not cover nursing home care beyond a limited skilled nursing facility stay. Medicaid, however, is the largest payer of nursing home care in the United States