Medicare Supplement Plans are designed to cover the 20% of Medicare that is not covered by your Medicare Part A plan. If you are shopping for a Medicare Plan, it is important to remember that all of the options that you get in the market are not equal. You will always find differences on various factors like high deductible low premium plans vs low deductible high premium plans and deciding what other perks you are interested in like a gym membership or $0 copays for doctor visits. This is why getting various medicare quotes is extremely important.