A pay-per-visit health coverage plan that allows individuals to go to any doctor, hospital, or other health care supplier who accepts Medicare and who is accepting new Medicare patients. The individual is responsible for paying a deductible and copayment. Under Original Medicare, Medicare pays a portion of the Medicare-approved amount, while the individual pays for his/her share (coinsurance). Original Medicare has two parts: Part A (Hospital Insurance) and Part B (Medical Insurance).