; (ii) any physician’s assistant or nurse practitioner who is supervised by a doctor of medicine or osteopathy described in clause (i); or (iii) any other person determined by the Secretary to be capable of providing health care services. (B) Other health care services A person is capable of providing health care services if the person is— (i) a podiatrist, dentist, clinical psychologist, optometrist, or chiropractor (limited to treatment consisting of manual manipulation of the spine to correct a subluxation as demonstrated by X-ray to exist) authorized to practice in the State and performing within the scope of their practice as defined under State law; (ii) a nurse practitioner, nurse-midwife, clinical social worker, or physician’s assistant who is authorized to practice under State law and who is performing within the scope of their practice as defined under State law