What Is Medicare Supplement Insurance?
Medicare Supplement Insurance, also known as Medigap, is only available to people enrolled in Original Medicare (Part A and Part B). You may not have a Medicare Supplement Insurance plan and a Medicare Advantage plan (Part C) at the same time.
These policies are sold by private insurance companies and help Medicare beneficiaries by covering some of the program’s out-of-pocket costs, such as Medicare copayments, coinsurance and deductibles.
You are not required to have Medigap if you are on Medicare. Medigap policies can cover a lot of what is included in other supplemental insurance policies, including extended stays in the hospital or emergency medical cover while abroad.
If you sign up for Medicare Supplement Insurance during your Medigap open enrollment period, insurance companies cannot use your medical history to charge you more for a policy or deny your application. Your open enrollment period lasts for six months and automatically begins the month you are both 65 and enrolled in Medicare Part B.
In most states, there are 10 standardized Medigap plans that include different levels of basic benefits. The plans are named by letter (Plans A, B, C, D, F, G, K, L, M and N).
Important: Plan C and Plan F are not available to beneficiaries who became eligible for Medicare on or after January 1, 2020.
The chart below shows which benefits are included in each of the standardized Medigap plans. A check mark means the plan covers that benefit.