Medicare may pay for inpatient hospital, doctor, or ambulance services you get in a foreign country in some rare cases.
This plan is designed for U.S. citizens and U.S. permanent residents 65 years of age or older, who are qualified for Medicare, actively enrolled in Medicare Parts A & B and enrolled in a Medigap Plan or Medicare Advantage Plan.
In general, health care you get while traveling outside the U.S. isn't covered. The 50 states, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, Guam, the Northern Mariana Islands, and American Samoa are considered part of the U.S.
Beneficiaries with Original Medicare are responsible for a deductible and coinsurance for most covered services. The deductible is the amount a beneficiary must pay before Medicare begins to pay for services and supplies covered under the program. Coinsurance is the share of the cost for services that the beneficiary is responsible for after the deductible is met (normally a 20/80 percentage).
Medicare drug plans don't cover prescription drugs you buy outside the U.S. Medicare doesn't cover dialysis you get when you travel outside the U.S. unless it's an emergency in which you get dialysis at a hospital. Medicare supplement insurance (Medigap) policies may cover you when you travel outside the U.S.
Medicare may pay for inpatient hospital, doctor, or ambulance services you get in a foreign country in these rare cases:
You pay 100% of the costs, in most cases. In the situations described above, you pay 20% of the approved amount, and the Part B deductible applies. In the situations above, Medicare pays only for services covered under Original Medicare:
(Hospital Insurance) Covers hospital care (care you get when you've been formally admitted with a doctor's order to the foreign hospital as an inpatient).
Part B covers emergency and non-emergency ambulance and doctor services you get immediately before and during your covered foreign inpatient hospital stay. Medicare generally won't pay for services (like return ambulance trips home) if Medicare didn't cover your hospital stay, or you got ambulance and doctor services outside the hospital after your covered hospital stay ended.
The part of the charge you would normally pay for covered services. This includes any medically necessary doctor and ambulance services you get in a foreign country as part of a covered inpatient hospital stay. You also pay the coinsurance, copayments, and deductibles you'd normally pay if you got these same services or supplies inside the U.S.
Some of the information above is from www.medicare.gov