Final answer:
Medicare generally pays 80% of the approved medical bill amount once the deductible for Part B is satisfied, with beneficiaries responsible for the remaining 20%.
Step-by-step explanation:
Medicare is a government health insurance program that primarily serves individuals who are 65 or older. Once a beneficiary has paid their deductible, Medicare Part B typically covers 80% of the approved amount for most doctor services, outpatient therapy, and durable medical equipment. The remaining 20% is usually the responsibility of the beneficiary, which can also be covered by supplementary insurance. It's important to note that this coverage pertains to Medicare Part B, and the percentages may differ for other parts of Medicare.