; and (ii) pulmonary rehabilitation services (as defined in section 1861(fff)(1)). (B) General supervision (i) Overall direction and control of physician Subject to clause (ii), with respect to the furnishing of therapeutic hospital outpatient services for which payment may be made under this part, the term general supervision means such services that are furnished under the overall direction and control of a physician or non-physician practitioner, as the case may be. (ii) Presence not required For purposes of clause (i), the presence of a physician or non-physician practitioner is not required during the performance of the procedure involved. (C) Direct supervision (i) Provision of assistance and direction Subject to clause (ii), with respect to the furnishing of therapeutic hospital outpatient services for which payment may be made under this part, the term direct supervision means that a physician or non-physician practitioner, as the case may be, is immediately available (including by telephone or other means) to furnish assistance and direction throughout the furnishing of such services. Such term includes, with respect to the furnishing of a therapeutic hospital outpatient service for which payment may be made under this part, direct supervision during the initiation of the service followed by general supervision for the remainder of the service (as described in paragraph (2)(A)(ii)). (ii) Presence in room not required For purposes of clause (i), a physician or non-physician practitioner, as the case may be, is not required to be present in the room during the performance of the procedure involved or within any other physical boundary as long as the physician or non-physician practitioner, as the case may be, is immediately available. (D) Non-physician practitioner defined The term non-physician practitioner means an individual who— (i) is a physician assistant, a nurse practitioner, a clinical nurse specialist, a clinical social worker, a clinical psychologist, a certified nurse midwife, or a certified