42 CFR § 440.20 - Outpatient hospital services and rural health clinic services.
(a) Outpatient hospital services means preventive, diagnostic, therapeutic, rehabilitative, or palliative services that -
(1) Are furnished to outpatients;
(2) Are furnished by or under the direction of a physician or dentist; and
(3) Are furnished by an institution that -
(ii) Meets the requirements for participation in Medicare as a hospital; and
(4) May be limited by a Medicaid agency in the following manner: A Medicaid agency may exclude from the definition of “outpatient hospital services” those types of items and services that are not generally furnished by most hospitals in the State.
(b) Rural health clinic services. If nurse practitioners or physician assistants (as defined in § 481.1 of this chapter) are not prohibited by State law from furnishing primary health care, “rural health clinic services” means the following services when furnished by a rural health clinic that has been certified in accordance with part 491 of this chapter.
(1) Services furnished by a physician within the scope of practice of his profession under State law, if the physician performs the services in the clinic or the services are furnished away from the clinic and the physician has an agreement with the clinic providing that he will be paid by it for such services.
(2) Services furnished by a physician assistant, nurse practitioner, nurse midwife or other specialized nurse practitioner (as defined in §§ 405.2401 and 491.2 of this chapter) if the services are furnished in accordance with the requirements specified in § 405.2414(a) of this chapter.
(3) Services and supplies that are furnished as an incident to professional services furnished by a physician, physician assistant, nurse practitioner, nurse midwife, or specialized nurse practitioner. (See §§ 405.2413 and 405.2415 of this chapter for the criteria for determining whether services and supplies are included under this paragraph.)
(4) Part-time or intermittent visiting nurse care and related medical supplies (other than drugs and biologicals) if:
(ii) The services are furnished by a registered nurse or licensed practical nurse or a licensed vocational nurse employed by, or otherwise compensated for the services by, the clinic;
(iii) The services are furnished under a written plan of treatment that is established and reviewed at least every 60 days by a supervising physician of the clinic or that is established by a physician, physician assistant, nurse practitioner, nurse midwife, or specialized nurse practitioner and reviewed and approved at least every 60 days by a supervising physician of the clinic; and
(iv) The services are furnished to a homebound beneficiary. For purposes of visiting nurse care, a “homebound” beneficiary means one who is permanently or temporarily confined to his place of residence because of a medical or health condition. He may be considered homebound if he leaves the place of residence infrequently. For this purpose, “place of residence” does not include a hospital or a skilled nursing facility.
(c) Other ambulatory services furnished by a rural health clinic. If the State plan covers rural health clinic services, other ambulatory services means ambulatory services other than rural health clinic services, as defined in paragraph (b) of this section, that are otherwise included in the plan and meet specific State plan requirements for furnishing those services. Other ambulatory services furnishd by a rural health clinic are not subject to the physician supervision requirements specified in § 491.8(b) of this chapter, unless required by State law or the State plan.