42 CFR § 412.50 - Furnishing of inpatient hospital services directly or under arrangements.
(a) The applicable payments made under the prospective payment systems, as described in subparts H and M of this part, are payment in full for all inpatient hospital services, as defined in § 409.10 of this chapter. Inpatient hospital services do not include the following types of services:
(3) Nurse practitioner and clinical nurse specialist services, as defined in section 1861(s)(2)(K)(ii) of the Act.
(4) Certified nurse mid-wife services, as defined in section 1861(gg) of the Act.
(5) Qualified psychologist services, as defined in section 1861(ii) of the Act.
(6) Services of an anesthetist, as defined in § 410.69 of this chapter.
(b) CMS does not pay any provider or supplier other than the hospital for services furnished to a beneficiary who is an inpatient, except for the services described in paragraphs (a)(1) through (a)(6) of this section.