Mental Health, Substance Abuse and Wellness Guide

Mount Sinai South Nassau (formerly South Nassau Communities Hospital) is a nonprofit, acute-care teaching hospital in Oceanside, NY, with 455 beds and a large physician and staff network. It provides comprehensive services including emergency care, cardiology, oncology, orthopedics, bariatrics, pain management, and mental health, plus advanced radiosurgery (Novalis Tx and Gamma Knife Perfexion). The hospital operates several outpatient centers and is designated a Stroke Center by the NYS Department of Health and a Comprehensive Community Cancer Center by the ACS. It is part of Mount Sinai Health System and serves the Long Island region, with a primary campus in Oceanside and additional locations nearby (e.g., Long Beach). If you’re seeking primary care in Hempstead specifically, Mount Sinai South Nassau may offer affiliated primary care providers in the area through its system, but this page focuses on the hospital and its Long Island locations rather than Hempstead-based primary care directly. For Hempstead-specific primary care, contact Mount Sinai South Nassau’s patient access or visit their site to find affiliated primary care physicians. Contact: info@southnassau.org; 877-768-8462 / 516-632-3000.

Mental Health Association of Nassau County (MHANC) is a nonprofit, not-for-profit membership organization focused on improving community mental health in Long Island. Founded in 1953 and headquartered in Hempstead, NY, MHANC advances advocacy, education, program development, and direct services. It reports about 38 employees and annual revenue around $44.7 million. Contact: info@mhanc.org or mhanc@mhanc.org; phone (516) 489-2322. Addresses: 16 Main Street, Hempstead, NY 11550 (HQ) and additional Hempstead offices. Website: mhanc.org.