Medicare is primarily funded by the federal government, but states contribute to certain programs and cover costs for some beneficiaries

Medicare is a federal program run by the Centers for Medicare & Medicaid Services (CMS), a division of the U.S. Department of Health and Human Services. The federal government collects payroll taxes from workers and employers to fund the program's main parts. However, the funding picture is more complex than "federal only" — states pay into specific Medicare programs and cover additional costs for people who may have access to for both Medicare and Medicaid.

Understanding who pays matters because it affects how the program changes, who sets the rules, and what coverage you receive. The funding source also determines whether your state's budget decisions can change your benefits.

Key Takeaways

  • The federal government funds Medicare Part A (hospital insurance) and Part B (medical insurance) through payroll taxes collected from workers and employers.
  • States share the cost of Medicare Part D (prescription drug coverage) and pay the full cost of Medicaid, which covers some seniors who have both programs.
  • People enrolled in both Medicare and Medicaid (called "dual may be able to access") have their costs split between federal and state funding.
  • Medicare rules and payment rates are set federally, but states can add their own programs on top of federal coverage.

How the Federal Government Funds Medicare Parts A and B

Medicare Part A (hospital insurance) and Part B (medical insurance) are funded through the Medicare payroll tax, which is 2.9 percent of a worker's wages — split equally between employee and employer. Self-employed people pay the full 2.9 percent. This tax goes into two trust funds: the Hospital Insurance Trust Fund (Part A) and the Supplementary Medical Insurance Trust Fund (Part B).

When you turn 65 and enroll in Medicare, your Part A and Part B benefits come from these federal trust funds. The federal government sets what doctors, hospitals, and other providers are paid, and these payment rates explore the same way in every state. If you have Original Medicare (Part A and Part B), your coverage is entirely federal — your state government has no role in paying for your care or setting your benefits.

Part B also receives funding from general federal income taxes, not just payroll taxes. This means the federal government covers a portion of Part B costs beyond what beneficiaries pay in premiums.

State Funding for Medicare Part D and Dual-may be able to access Beneficiaries

States begin to share costs when prescription drug coverage enters the picture. Medicare Part D (prescription drug plans) is funded by the federal government, but states contribute to the cost of low-income seniors' premiums and cost-sharing. If you receive Part D and have limited income, your state may pay part or all of your premium and deductible.

The largest state contribution comes through Medicaid, the joint federal-state program for low-income people. Seniors who may have access to for both Medicare and Medicaid — called dual may be able to access — have their costs split between the two programs. Medicare pays first for covered services, and Medicaid covers what Medicare does not pay, plus services Medicare does not cover at all (like long-term care in a nursing home). Each state sets its own Medicaid income and asset limits, so may be able to access and coverage vary by state.

For dual-may be able to access beneficiaries, the state where you live determines what additional services you receive beyond Medicare. Some states cover dental care, vision, or hearing aids through Medicaid; others do not. This is why a senior's total coverage can look very different depending on which state they live in.

Medicare Advantage and Medicaid Managed Care Plans

Medicare Advantage (Part C) plans are run by private insurance companies, but they are paid by the federal government. CMS pays these plans a fixed amount per beneficiary each month, and the plans must cover everything Original Medicare covers. The federal government sets the rules and payment rates, even though a private company administers your care.

Some Medicare Advantage plans also include Medicaid coverage if you are dual may be able to access. In these cases, the plan receives payment from both the federal government (for Medicare) and your state (for Medicaid). The plan coordinates both programs, but the funding still comes from two sources.

What Happens When States Run Out of Medicaid Money

Because Medicaid is jointly funded, states have more control over their Medicaid budgets than over Medicare. If a state faces a budget crisis, it can reduce Medicaid benefits, raise income limits, or freeze enrollment — though federal law prevents states from cutting certain core services. Medicare benefits, by contrast, cannot be cut by a state because the federal government funds and controls the entire program.

If you are dual may be able to access and your state cuts Medicaid benefits, you still have your Medicare coverage, but you may lose the extra services Medicaid was paying for. This is one reason why dual-may be able to access seniors should understand both their Medicare and Medicaid coverage — they are not the same program, and changes to one do not automatically affect the other.

How Federal and State Funding Affects Your Out-of-Pocket Costs

The split between federal and state funding affects what you pay directly. With Original Medicare (Parts A and B), your costs are the same everywhere because the federal government sets all payment rates and your share of costs. You pay the same Part B premium whether you live in California or Maine.

With Medicaid, your costs depend on your state. A state may cover your Part B premium, your Part D deductible, or both — or it may cover neither. Some states offer programs that pay Medicare premiums and cost-sharing for people with limited income; others do not. Before you turn 65, it is worth learning what your state's Medicaid program covers, because it can significantly reduce your out-of-pocket costs if you may have access to.

Questions to Ask Your Doctor or Social Worker

If you are unsure whether you may have access to for Medicaid in addition to Medicare, or if you want to know what your state covers, ask your doctor's office or a social worker at your local senior center. You can also contact your state Medicaid office directly — the number is on your Medicaid card, or you can find it through your state's health department website.

If you are considering a Medicare Advantage plan, ask whether it includes Medicaid coverage in your state. Some plans do; others do not. Understanding the funding source helps you know whether your coverage could change if your state's budget changes.

Frequently Asked Questions

Can my state take away my Medicare benefits?

No. Medicare is entirely federal, so your state cannot reduce or eliminate your Part A or Part B benefits. However, if you also have Medicaid, your state can change what Medicaid covers. Your Medicare coverage stays the same regardless of state budget changes.

Why do Medicare payment rates look the same everywhere if states have a role?

Medicare Part A and Part B payment rates are set by the federal government and explore uniformly across all states. States do not negotiate these rates. States only contribute to costs for specific programs like Medicaid and Part D information for low-income beneficiaries.

If I move to a different state, does my Medicare change?

Your Medicare coverage stays the same because it is federal. However, if you have Medicaid, your coverage will change based on your new state's rules and income limits. You should contact your new state's Medicaid office within 30 days of moving to update your enrollment.

Does my state pay for my Medicare Advantage plan?

No. The federal government pays Medicare Advantage plans directly. Your state only contributes if the plan also includes Medicaid coverage and you are dual may be able to access. Even then, the federal payment covers the Medicare portion.

What if I cannot afford my Medicare premiums and my state does not help?

You may still may have access to for federal information programs like the Low-Income Subsidy (LIS) for Part D or the Medicare Savings Programs, which are federally funded. Contact your local Area Agency on Aging or call 1-800-MEDICARE to learn what programs you may may have access to for, regardless of your state's Medicaid decisions.