What Is a Medicare Supplement Plan?
Your Original Medicare pays for much of your medical expenses — but not all of them. A Medicare Supplement (Medigap) Plan covers the 20% of health expenses not covered by Original Medicare (Part A and Part B). This could include costs like copayments, coinsurance, or deductibles.
Your doctor first bills Medicare for your service or procedure. Then, Medicare pays the approved portion and sends the remainder of the bill to your Medicare Supplement insurance. Without a Medigap plan, you would be responsible for paying the remaining expenses out-of-pocket.