Medicare Part B primarily covers which of the following services?

Medicare Part B provides coverage for a variety of outpatient services, which includes necessary medical services such as doctor visits, outpatient care, preventive services, and diagnostic tests. Outpatient labs are specifically included in this coverage, allowing beneficiaries access to necessary lab work that can assist in diagnosing and monitoring medical conditions.

In contrast, inpatient hospital care is primarily covered under Medicare Part A. Pharmaceutical drugs are generally covered under Medicare Part D unless they are administered in a hospital setting, which may fall under Part B. Home health aide services can also be covered under Part A if the individual meets specific eligibility criteria but are not a primary focus of Part B. Thus, the option related to outpatient labs accurately reflects a core benefit of Medicare Part B.