This document outlines the roles and responsibilities of a mental health nurse. It discusses basic level functions such as counseling, milieu therapy, self-care activities, psychobiologic interventions, health teaching, and case management. More advanced functions include psychotherapy, prescriptive authority, consultation, evaluation, program development and clinical supervision. It also lists phenomena of concern for psychiatric-mental health nursing such as promoting well-being, managing impaired ability to function, and addressing alterations in thinking, perceiving and communicating.