shall only designate therapeutic hospital outpatient services requiring direct supervision under this part through proposed and final rulemaking that provides for public notice and opportunity for comment. (F) Rule of construction Nothing in this subsection shall be construed as authorizing the Secretary to apply or require any level of supervision other than general or direct supervision with respect to the furnishing of therapeutic hospital outpatient services. (3) Initial list of designated services The Secretary shall include in the proposed and final regulation for payment for hospital outpatient services for 2018 under this part a list of initial therapeutic hospital outpatient services, if any, designated under the process established under paragraph (2)(A) as requiring direct supervision under this part. (4) Direct supervision by non-physician practitioners for certain hospital outpatient services permitted (A) In general Subject to the succeeding provisions of this subsection, a non-physician practitioner may directly supervise the furnishing of— (i) therapeutic hospital outpatient services under this part, including cardiac rehabilitation services (under section 1861(eee)(1)), intensive cardiac rehabilitation services (under section 1861(eee)(4)), and pulmonary rehabilitation services (under section 1861(fff)(1))