Relocating to a new state during retirement brings exciting lifestyle changes, but moving across state lines also triggers important changes to your Medicare coverage. While Original Medicare Part A and Part B remain active anywhere in the United States, private options like Medicare Advantage, Part D prescription drug plans, and Medigap policies depend heavily on local service areas and state regulations. If you move without notifying the Social Security Administration and your insurance carriers, you risk losing critical drug coverage, facing unexpected out-of-network medical bills, or missing out on a Special Enrollment Period. Understanding these state-to-state transition rules ensures your healthcare protection remains uninterrupted wherever you choose to call home.