Mont. Code Ann. § 27-1-1101
Definition
27-1-1101 . Definition. As used in this part, "mental health professional" means:
(1) a certified professional person as defined in 53-21-106 ;
(2) a physician licensed under Title 37, chapter 3;
(3) a psychologist licensed under Title 37, chapter 17;
(4) an advanced practice registered nurse, as provided for in 37-8-202 , with a clinical specialty in psychiatric mental health nursing; or
(5) a clinical social worker, a professional counselor, or a marriage and family therapist licensed under Title 37, chapter 39.