Final answer:
None of the medications listed are typically covered by Medicare Part B as they do not have intravenous equivalents. These medications are oral and generally covered under Medicare Part D.
Step-by-step explanation:
Medicare Part B covers some prescription drugs, typically those that are administered in a clinical setting, such as injectable and infused drugs. Among the options provided, none of the medications (Promacta, Xeloda, Temodar) are typically covered under Medicare Part B as none of them have an intravenous (IV) equivalent that would be administered in a clinical setting. Medications that can be billed to Medicare Part B include drugs that are not usually self-administered, such as chemotherapy drugs, some antibiotics, and certain medical supplies used to administer insulin. For example, IV equivalents like cisplatin and injectable antibiotics such as daunorubicin, doxorubicin, and etoposide are examples of drugs covered under Part B. However, Promacta (eltrombopag), Xeloda (capecitabine), and Temodar (temozolomide) are oral medications typically covered under Medicare Part D, which is designed to cover prescription drugs filled at a pharmacy.