Medicare supplement insurance, also referred to as Medigap, bridges the gap between the coverage provided by the original Medicare and your out-of-pocket expenses for deductibles, copayments and coinsurance. Medigap policies pay only for the services deemed necessary by Medicare and according to the charges approved by them. Some Medigap plans may offer benefits, like emergency care when in a foreign country, that are not extended by Medicare.

Medicare supplement policies are sold by authorized private insurance companies. Every year, your Medigap policy is renewed automatically. If you happen to drop your Medigap policy, it may not be possible for you to get it back again. You may also not be able to purchase a new policy.