(1) A physician assistant is professionally and legally responsible for the care and treatment of a patient by a physician assistant licensed in accordance with this chapter.
(2) A physician assistant may:
(a) diagnose, examine, and treat human conditions, ailments, diseases, injuries, or infirmities, either physical or mental, by any means, method, device, or instrumentality;
(b) obtain informed consent;
(c) supervise, delegate, and assign therapeutic and diagnostic measures;
(d) certify the health or disability of a patient as required by any local, state, or federal program; and
(e) authenticate any document that a physician may authenticate.