Which of the following is a service that can be provided under Medicare Part B?

Medicare Part B primarily covers outpatient services, which include a range of healthcare services that are typically not provided in a hospital. Physical therapy is specifically included under these services, as it is considered a necessary treatment for various conditions that impair an individual's ability to function in daily life. Under Medicare Part B, beneficiaries can receive therapy in outpatient settings, including clinics or their own homes, provided that it is prescribed by a physician.

In contrast, home oxygen therapy, while it can be covered under Medicare, typically falls under Medicare Part B as durable medical equipment, but it is not classified in the same way as physical therapy since it involves equipment provision rather than direct therapeutic services. Skilled nursing care is covered under Medicare Part A when provided in a skilled nursing facility, specifically related to rehabilitation after hospitalization, and is not generally considered an outpatient service. Long-term care services, such as custodial care in a nursing home, are not covered by Medicare, as those are classified under long-term care rather than skilled or medically necessary outpatient services.