Which of the following services is not covered by Medicare Part B for Sharon?

Medicare Part B primarily covers a range of outpatient services, including diagnostic tests, doctor visits, and preventive services. However, it does not typically cover prescription medications, which are mainly addressed under Medicare Part D. Thus, Medicare Part B would not cover COPD medication, as it falls under the category of prescription drugs that require a separate plan for coverage under Medicare. This distinction helps to clarify the boundaries of Medicare Part B's offerings and supports beneficiaries in understanding where to turn for necessary medication coverage.