Final answer:
Medicare will pay $400.00 (80% of the allowable charge) and the doctor will accept $400.00 as payment in full from Medicare.
Step-by-step explanation:
The Medicare allowable charge for the service is $500.00. Since the patient has already met her deductible for the current year, Medicare will pay 80% of the allowable charge. Therefore, Medicare will pay $400.00 (80% of $500.00). However, since the doctor participates in Medicare, they have agreed to accept the Medicare-approved amount as full payment for the service. So, the doctor will accept $400.00 as payment in full from Medicare.