No single Medicare plan works in all 50 states the same way

Medicare Part A and Part B — Original Medicare — are the only parts of Medicare that work identically in all 50 states. If you have Part A (hospital insurance) and Part B (medical insurance), you can use those benefits anywhere in the United States. Every hospital and doctor who accepts Medicare accepts Original Medicare the same way, whether you are in Maine or Hawaii.

Medicare Advantage plans (Part C) and Medigap plans (supplemental insurance) do not work this way. Advantage plans are sold by private insurers and vary by county — your plan in one state may not exist in another, and the network of doctors changes. Medigap plans are standardized nationally but sold by different insurers in different states, so availability and price shift by location.

If you need coverage that follows you across state lines without gaps, Original Medicare is your only choice. If you move or spend time in multiple states, this matters before you enroll.

Key Takeaways

  • Original Medicare (Part A and Part B) works the same in all 50 states and is accepted by any hospital or doctor who takes Medicare.
  • Medicare Advantage plans are county-specific and may not be available in the state you move to, or may have a different network of doctors.
  • Medigap plans are the same design in all states but sold by different insurers, so you may need to switch plans if you move.
  • If you split time between states or plan to move, Original Medicare avoids the need to find new coverage or switch plans mid-year.

How Original Medicare works across state lines

Original Medicare is run by the federal government, not by private companies. This means the rules, coverage, and payment rates are identical whether you are in California or Connecticut. When you show your Medicare card to a hospital or doctor, they see the same thing regardless of where you are.

You can see any doctor or go to any hospital that accepts Medicare, anywhere in the country. There is no network restriction — you do not have to use doctors in a specific list. This is the core difference from Advantage plans, which limit you to in-network providers in their service area.

Original Medicare does require you to pay a deductible and coinsurance for some services. Part A has a deductible for hospital stays. Part B has an annual deductible and you pay 20 percent of most services after that. Many people add a Medigap plan to cover these costs, but the Original Medicare benefit itself is uniform across all states.

Why Medicare Advantage plans are not available everywhere

Medicare Advantage is sold by private insurers like UnitedHealthcare, Humana, and Aetna. Each insurer decides which counties and states to serve. A plan available in your county may not exist in the next county over, let alone in another state.

When you move, your Advantage plan typically ends on the last day of the month you move. You then have 60 days to enroll in a new plan in your new location. If no plan you like is available there, you are stuck waiting until the next open enrollment period in the fall — unless you move into a situation that triggers a Special Enrollment Period, such as losing employer coverage.

Advantage plans also have different networks in different regions. The doctors and hospitals covered by your plan in one state are not the same as those covered in another state. This means if you move, you may lose access to your current doctors even if the same insurer operates in your new location.

Medigap plans and state-to-state moves

Medigap plans are standardized by the federal government — a Plan G in Florida is the same coverage as a Plan G in Oregon. However, Medigap is sold by private insurers, and not every insurer sells in every state. The price also varies widely by state and by insurer.

If you move to a new state, your current Medigap plan may not be sold there. You will need to find a new insurer in your new state that sells the same plan letter (A, B, D, G, K, L, M, or N). You may pay a different premium, and you may face underwriting — the new insurer may ask health questions and could deny you or charge more based on your health history.

Some states have rules that protect people who move. For example, a few states require insurers to accept you without underwriting if you are switching from another Medigap plan. But this is not true everywhere. Before you move, contact a Medigap insurer in your new state to learn what plans they sell and what the process will be.

What to do if you move or split time between states

If you are moving permanently, contact Medicare at 1-800-MEDICARE at least two weeks before you move. Tell them your new address. They will send you new materials and can answer questions about what coverage is available in your new location.

If you have an Advantage plan, you have 60 days after you move to enroll in a new plan in your new state. Do this early — do not wait until day 59. Call the plans you are interested in and confirm they serve your new address, because some plans have gaps even within a state.

If you have a Medigap plan, start calling insurers in your new state at least 30 days before you move. Ask which plans they sell, what the premium is, and whether you will need to answer health questions. If you are moving to a state with protections for people switching Medigap plans, ask the insurer about that too.

If you split time between two states — for example, you live in Florida in winter and Maine in summer — keep Original Medicare and add a Medigap plan. This way you have the same coverage in both places. Do not enroll in an Advantage plan if you spend significant time out of state, because you will not have coverage when you are in the other state.

Prescription drug coverage across state lines

If you have Original Medicare and a Part D prescription drug plan, your coverage works in all 50 states. You can fill prescriptions at any pharmacy that accepts your plan, anywhere in the country. However, the pharmacy network and formulary (the list of covered drugs) may vary slightly by region, so check before you move whether your current plan covers your medications in your new state.

If you have a Medicare Advantage plan that includes drug coverage, your drug benefits end when you move out of the plan's service area. You will need to enroll in a new Advantage plan or switch to Original Medicare plus a Part D plan in your new location.

Frequently Asked Questions

Can I keep my Medicare Advantage plan if I move to another state?

No. Your Advantage plan ends on the last day of the month you move. You have 60 days to enroll in a new plan in your new state. If no plan you want is available, you may be able to switch to Original Medicare outside the normal enrollment window, depending on your situation.

Do I need to do anything if I move with Original Medicare?

Contact Medicare at 1-800-MEDICARE to update your address. Your Original Medicare coverage continues without interruption. If you have a Medigap or Part D plan, contact those insurers separately to confirm your coverage in your new state.

What happens to my Medigap plan if I move?

Your plan may not be sold in your new state. You will need to find a new Medigap insurer there. Some states protect you from underwriting when you switch plans, but not all do. Contact insurers in your new state before you move to learn your options.

Can I use my Medicare in all 50 states if I travel?

Yes, if you have Original Medicare. Your coverage works anywhere in the United States. If you have an Advantage plan, you only have coverage in your plan's service area, so traveling out of state leaves you uninsured for most services.

Is Original Medicare more expensive than Advantage if I move frequently?

Original Medicare costs the same everywhere and requires no plan changes when you move. Advantage plans are often cheaper monthly but require you to switch plans and networks each time you move. The total cost depends on your health needs and how often you move, so compare both options for your situation.