Medicare Supplement (Medigap) refers to various private supplemental health insurance plans sold to Medicare beneficiaries in the United States. This Medicare supplement provides coverage for medical expenses that are not or only partially covered by Medicare. Each Medigap plan offers a different combination of benefits. The coverage provided is roughly proportional to the premium paid. The problem with this medicare supplement is that most people do not know about it and willingly prepare for paying off the expenses not covered by their medicare. With proper knowledge about this medicare supplement plans and how they work, many people will be able to take full advantage of it.