Supplemental Insurance for Medicare, covers the left over medical bills not covered by Original Medicare. In most cases Medicare Part A and B only cover %80 of the bills, leaving you with a hefty tab to pick up in the case of surgery or extended stays in the Hospital. Medicare Part D covers Drug Prescription Costs. And Medicare Part C, or Medicare Advantage is another privately owned Insurance approved by Medicare that includes, Medicare Part A, B, and usually D. The Medigap plans are always the same, while the prices fluctuate between companies. For free quotes and answers talk to a pro, and call 1-800-MEDIGAP or visit http://1-800-medigap.com