Final answer:
CVS does not bill Medicare Part B for hospital stays as it covers outpatient services, not inpatient care. Inpatient care is covered under Medicare Part A, while pharmacy services are typically covered under Medicare Part D.
Step-by-step explanation:
CVS does not currently bill Medicare Part B for hospital stays because Medicare Part B primarily covers outpatient services, such as doctor's visits, vaccinations, and some medical equipment, rather than inpatient stays at hospitals. Hospital stays are generally covered under Medicare Part A, which is for inpatient care, skilled nursing facility care, hospice care, and some home health services. For pharmacy services and prescription drugs, these are typically covered under Medicare Part D, which is a prescription drug plan offered by Medicare-approved private insurers like CVS.