Advanced practice skills shall be utilized in the collection of relevant data to comprehensively assess the client's mental health. Assessment data shall be analyzed in determining diagnosis. A plan of care shall be developed and implemented that outlines treatment to attain expected outcomes. Individual, group, and family psychotherapy, child psychotherapy, behavioral care, case management, and other therapeutic treatments shall be utilized to assist clients in fostering mental health, preventing mental illness and disability, and improving or regaining previous health status and functional abilities. Advanced knowledge of psychobiological interventions shall be utilized and clinical skills applied to maximize the client's health and prevent further disability. The use of psycholobiological interventions in this chapter does not authorize the prescription of medications. The client's progress in attaining the expected outcome shall be evaluated. Strategies and interventions shall be utilized to promote and maintain health and prevent mental illness. Decisions and actions on behalf of clients shall be determined in an ethical manner.