Applies specialized clinical knowledge and advanced clinical skills in the areas of assessment, diagnosis, and crisis intervention of mental, emotional and behavioral disorders, conditions and addictions, including severe mental illness in adults and seniors, severe emotional disturbances in children and adolescents, and acutely intoxicated or withdrawing individuals. Obtains and completes all insurance pre-certifications and authorizations as determine necessity for pre-certification; coordinates with insurance companies, patients and clinical staff to obtain information; and maintains complete and accurate documentation.