Medigap Insurance Coverage

Supplemental Insurance also called Medigap, is a miscellaneous type of coverage sold by private companies and is designed to cover costs not done so by Original Medicare. Medicare covers quite a few types of medical expenses, but it isn't perfect, and it doesn't necessarily cover all the bases. Medigap insurance is purchased to fill in the gaps of coverage that Medicare leaves open. For example, some people use Medigap insurance to cover deductibles and annual co-pays, Medicare deductibles, coinsurance, and medical services not included in a standard Medicare payment,such as any medical services performed outside the United States. 

However, there are a couple of things to keep in mind when purchasing Medigap insurance. Opting for a Medicare Part C (Advantage Plan) will automatically nullify any Medigap coverage you might have. The two do not and cannot work together. If you're planning on making the switch to Medicare Advantage, get rid of Medigap before making the change.