What is a Medicare Supplement Plan?
Also known as a Medigap Plan, Medicare beneficiaries have the option to buy a supplement plan from an independent health insurance carrier to cover some of the expenses not covered by original Medicare.

In simplest terms this is how it works:
There are 10 Standard Medicare Supplements, each one is identified by a letter as shown in the chart below. Since Medigap plans are standardized you will know exactly which benefits you are purchasing. This means the monthly premium is the main difference between supplements with the same letter.