A fee-for-service health plan that lets enrollees go to any doctor, hospital, or other health care supplier who accepts Medicare and is accepting new Medicare patients. The enrollee must pay the deductible. Medicare pays its share of the Medicare-approved amount, and the enrollee pays a share (coinsurance). In some cases the enrollee may be charged more than the Medicare-approved amount. The Original Medicare Plan has two parts: Part A (Hospital Insurance) and Part B (Medical Insurance).