The scope of PCNS practice is reflective of standards for the provision of psychiatric health care services to individuals throughout the lifespan, including health promotion, disease prevention, health education, counseling and making referrals to other members of the health care team, as well as the diagnosis and management of acute and chronic psychiatric illness and psychiatric disease. A PCNS provides care in diverse settings, including, but not limited to, home, hospital, nursing facilities, and a variety of ambulatory care settings including private offices, community and public health clinics. Orders tests and therapeutics. Prescribes medications under written guidelines with supervising physician.