Which of the following services is covered under Part B of Medicare?

Part B of Medicare is designed to cover a range of outpatient services and medical care that is essential for beneficiaries. This includes doctor services — such as visits to your primary care physician or specialists — as well as outpatient care, which can involve a variety of services provided outside of a hospital setting. Additionally, Part B covers certain preventive services aimed at preventing illnesses or detecting them at an early stage.

In contrast, inpatient hospital care falls under Part A, which focuses on hospital and skilled nursing facility care. Home health care, while partially covered by Medicare, does not exclusively fall under Part B; it can also involve various services that require specific conditions to be met. Finally, long-term care, which includes assistance with daily living activities over an extended period, is generally not covered by Medicare at all. Thus, Part B is primarily focused on a variety of outpatient services, making it the correct choice in this context.