Which of the following services is covered by Medicare Part A?

Medicare Part A primarily covers inpatient hospital services. This includes costs associated with a patient being formally admitted to a hospital, such as room and board, nursing, and other hospital services during their stay. Part A is designed to cover necessary hospitalization needs, which encompasses general inpatient hospital stays, skilled nursing facilities following a hospital stay, and certain home health services when prescribed by a doctor.

Outpatient services, including outpatient doctor visits and emergency room services, fall under Medicare Part B rather than Part A. Preventive care is also covered under Medicare Part B, which focuses on outpatient services aimed at preventing health issues rather than treating them in an inpatient setting. Hence, the answer focuses on the specific services that are distinctly covered under Medicare Part A, emphasizing that inpatient hospital stays are a fundamental part of this coverage.