It depends on where you travel and what type of Medicare plan you have. Original Medicare generally does not cover health care services outside the United States, except in some limited situations. Some Medigap plans may cover up to 80% of emergency care costs when you travel abroad, but you may have to pay a deductible and a lifetime limit. Medicare Advantage plans may or may not cover health care services outside the United States, depending on the plan. You should check with your plan before you travel to find out what is covered.