Southeast Nassau Guidance Center (SNG)

2146 Jackson Avenue, Seaford, NY 11783, USA


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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.


Primary Focus of the Provider

  • Substance Abuse Treatment Services

Type of Care

  • Substance abuse treatment
  • Buprenorphine used in treatment
  • Accepts clients on opioid medication

Facility Type


Treatment Approaches

  • Cognitive/behavioral therapy
  • Substance abuse counseling approach
  • Trauma-related counseling

Facility Smoking Policy

  • Smoking not permitted

Service Setting (e.g., Outpatient, Residential, etc.)

  • Outpatient
  • Outpatient methadone/buprenorphine or vivitrol
  • Regular outpatient treatment

Facility Operation (e.g. Private, Public)

  • Private organization

Payment/Insurance Accepted

  • Cash or self-payment
  • Medicaid
  • Medicare
  • State financed health insurance plan other than Medicaid
  • Private health insurance
  • Military insurance (e.g., TRICARE)

Emergency Mental Health Services


Payment Assistance Available


Language Services


Special Programs/Groups Offered

  • Persons with co-occurring mental and substance abuse disorders
  • Lesbian, gay, bisexual, or transgender (LGBT) clients
  • Veterans
  • Active duty military
  • Military families
  • Clients referred from the court/judicial system
  • Seniors or older adults
  • Pregnant/postpartum women
  • Adult women
  • Adult men
  • Persons with HIV or AIDS
  • Persons who have experienced trauma
  • Persons who have experienced sexual abuse
  • Persons who have experienced intimate partner violence, domestic violence
  • Transitional age young adults

Ancillary Services

  • Individual counseling offered
  • Group counseling offered
  • Family counseling offered
  • Marital/couples counseling offered
  • Brief intervention approach
  • Motivational interviewing
  • Anger management

Age Groups Accepted

  • Young adults
  • Adults

Gender Accepted

  • Female
  • Male

Exclusive Services

  • DUI/DWI clients

  • Southeast Nassau Guidance Center (SNG)

    2146 Jackson Avenue, Seaford, NY 11783