Section 140.313 - Physician Staff and Responsibility for Practice of Medicine(A) One or more physicians, as necessary, shall provide, or supervise the provision of, all services involving the practice of medicine.(B) At least one physician shall be present at the clinic whenever medical services are provided, unless these services are provided pursuant to written protocols or guidelines by a physician assistant or a nurse practicing in an expanded role in accordance with the regulations of the appropriate registration board.Amended by Mass Register Issue 1443, eff. 5/14/2021.