B. The provider component
Provider-based physicians often perform professional services other than those directly related to the medical care of individual patients. These may involve teaching, administrative, and other services that benefit the provider's patients as a group. Such services, not directly related to an individual patient, if compensated, are considered in computing reimbursable provider costs. Reimbursement for such costs is made under Part A when they relate to inpatient services and under Part B when they relate to outpatient services and inpatient ancillary services when Part A benefits are not payable.