operating costs of inpatient hospital services
(4) For purposes of this section, the term “operating costs of inpatient hospital services” includes all routine operating costs, ancillary service operating costs, and special care unit operating costs with respect to inpatient hospital services as such costs are determined on an average per admission or per discharge basis (as determined by the Secretary), and includes the costs of all services for which payment may be made under this subchapter that are provided by the hospital (or by an entity wholly owned or operated by the hospital) to the patient during the 3 days (or, in the case of a hospital that is not a subsection (d) hospital, during the 1 day) immediately preceding the date of the patient’s admission if such services are diagnostic services (including clinical diagnostic laboratory tests) or are other services related to the admission (as defined by the Secretary). Such term does not include costs of approved educational activities, a return on equity capital, other capital-related costs (as defined by the Secretary for periods before October 1, 1987 ), for cost reporting periods beginning on or after October 1, 2020 , costs related to hematopoietic stem cell acquisition for the purpose of an allogeneic hematopoietic stem cell transplant (as described in subsection (d)(5)(M)), or costs with respect to administering blood clotting factors to individuals with hemophilia. In applying the first sentence of this paragraph, the term “other services related to the admission” includes all services that are not diagnostic services (other than ambulance and maintenance renal dialysis services) for which payment may be made under this subchapter that are provided by a hospital (or an entity wholly owned or operated by the hospital) to a patient— (A) on the date of the patient’s inpatient admission; or (B) during the 3 days (or, in the case of a hospital that is not a subsection (d) hospital, during the 1 day) immediately preceding the date of such admission unless the hospital demonstrates (in a form and manner, and at a time, specified by the Secretary) that such services are not related (as determined by the Secretary) to such admission.