Final answer:
Medicare Part B covers a portion of physician fees for outpatient services, but participants are responsible for paying a monthly fee, deductible charges, and copayments.
Step-by-step explanation:
Medicare Part B pays for physician fees for outpatient services such as physician visits and medical tests. However, it does not cover the full amount. Participants are responsible for paying a monthly fee, deductible charges, and copayments. The government contributes about three-fourths of the overall costs.