If you move to another state and your plan's Supplement Plan G is available in your new location, you can keep your plan. If it's not available in your new location, you may need to switch plans or providers if other companies offer Plan G coverage in your new area. You can keep your Medicare Plan G coverage if you move to another country, although it wouldn't cover care other than emergency care visits—and that's after a $250 deductible. If you plan to move back to the U.S., it may be worth keeping Medicare Plans A and B, though Plan B may incur higher premiums. It depends on how long you plan to be gone and other insurance options for you in your new home country.