If you have Original Medicare (Part A and Part B), moving to a different state generally does not disrupt your coverage at all. Original Medicare is a federal program, and any doctor or hospital that accepts Medicare anywhere in the United States will accept your coverage. You do not need to notify Medicare of a move just to keep Part A and Part B active, though you should update your address with Social Security so you continue receiving important notices and your premium billing stays accurate.
If you also have a Medicare Supplement (Medigap) policy, the picture is a bit different. Medigap plans are sold by private insurers and regulated at the state level, so the exact same plan may not be available, or may cost more or less, in your new state. Your current policy typically still works if you keep paying premiums, since Medigap benefits are standardized and honored nationwide by any provider who accepts Medicare. However, if you want to switch to a cheaper or different Medigap plan after moving, you may face medical underwriting unless you qualify for a guaranteed-issue right, which a permanent move can sometimes trigger.
The biggest change usually involves Medicare Advantage (Part C) and Part D prescription drug plans. These plans have specific service areas, often limited to certain counties or states. If you move outside your plan's service area, your Medicare Advantage or Part D coverage will end, and you will need to pick a new plan available where you now live. Moving out of a plan's service area triggers a Special Enrollment Period, giving you a window (typically starting the month before your move and continuing for two full months after) to enroll in a new Medicare Advantage or Part D plan without penalty. If you move within the same service area but your plan still covers the new address, no action is needed.
It is important to report a move to your Medicare Advantage or Part D plan provider as soon as possible, since they will confirm whether your new address is still in the coverage area and help you avoid a lapse in prescription drug coverage. Failing to switch plans in time could leave you temporarily without drug coverage or force you back onto Original Medicare with a gap in benefits until you enroll elsewhere.
Before moving, it's smart to research what plans are available in your destination state or county, compare premiums and provider networks, and decide whether Original Medicare with Medigap or a new Medicare Advantage plan makes more sense. A licensed insurance agent, your State Health Insurance Assistance Program (SHIP), or Medicare's plan finder tool can help you compare options based on your new location before you actually relocate.