Is responsible for assessing, planning, implementing, evaluating and if necessary, delegating patient care for a specified group of patients. Collaborates with physicians, medical professionals and other staff to ensure the quality of care. Provides care for the neonate, pediatric, adolescent, adult or geriatric patient. Utilizes knowledge of the principles of growth and development appropriate to the patient's age to ensure that care provided meets the unique, physical and psychosocial needs of the patient. Involves appropriate parties (i.e., patient's family or guardian, outside agencies) in the assessment, treatment and continuing care of the patient as needed.