In this chapter:
(1) "Patient" means a person who consults or is interviewed by a professional for diagnosis, evaluation, or treatment of any mental or emotional condition or disorder, including alcoholism or drug addiction.
(2) "Professional" means:
(A) a person authorized to practice medicine in any state or nation;
(B) a person licensed or certified by this state to diagnose, evaluate, or treat any mental or emotional condition or disorder; or
(C) a person the patient reasonably believes is authorized, licensed, or certified as provided by this subsection.