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Founded in 1958, Southeast Nassau Guidance Center (SNG) is a voluntary, non-profit community agency which provides Mental Health, Drug Abuse, and Alcoholism treatment services to adults and families in the southeast Nassau County community. SNG serves over 1500 individuals and families yearly through 40,000 visits in our four programs.

An agency affiliated with the Nassau County Office of Mental Health, Chemical Dependency and Developmental Disabilities Services and licensed by the New York State Office of Mental Health (OMH) and the New York State Office of Alcoholism and Substance Abuse Services (OASAS). SNG participates in the United Way of Long Island.