South Nassau Communities Hospital is an acute-care, non-profit teaching hospital. With more than 875 physicians, the hospital provides a large number of services, including mental health treatment, bariatric surgery and emergency and elective angioplasty. South Nassau is the only hospital in Long Island that provides non-invasive treatment of brain tumors with the Gamma Knife. In addition to its 433 beds, the hospital also has a number of outpatient specialty centers.