OTP, Detox, Psychiatric Hospitals, Sober Living, Drug & Alcohol Rehab & Mental Health in Nassau County

With 58 SAMHSA-listed care providers spread over 31 cities, Nassau County, New York can be compared below by care type using services, payment options, and location from FindTreatment.gov. These listings are unrated; verify services, licensing, cost, and availability directly.

Browse the New York directory or jump to a city:

Baldwin, NY 1 facilities Bethpage, NY 1 facilities East Meadow, NY 4 facilities Elmont, NY 1 facilities Freeport, NY 2 facilities Garden City, NY 4 facilities Glen Cove, NY 2 facilities Glen Oaks, NY 1 facilities Great Neck, NY 1 facilities Hempstead, NY 7 facilities Hicksville, NY 7 facilities Inwood, NY 1 facilities Levittown, NY 1 facilities Long Beach, NY 2 facilities Manhasset, NY 1 facilities Massapequa, NY 1 facilities Massapequa Park, NY 1 facilities Merrick, NY 1 facilities Mineola, NY 2 facilities New Hyde Park, NY 1 facilities Old Bethpage, NY 1 facilities Plainview, NY 3 facilities Port Washington, NY 1 facilities Rockville Centre, NY 2 facilities Roosevelt, NY 1 facilities Roslyn Heights, NY 1 facilities Syosset, NY 1 facilities Valley Stream, NY 2 facilities West Hempstead, NY 2 facilities Westbury, NY 1 facilities Woodmere, NY 1 facilities

Opioid Treatment Programs in Nassau County

4 providers in Nassau County: Hicksville, Glen Oaks, East Meadow, Long Beach

Opioid Treatment Program CS Medical Associates, P.C. Hicksville, NY 11801 SAMHSA-listed Opioid Treatment Program Long Island Jewish Hillside Medical Center Methadone Maintenance Treatment Program Glen Oaks, NY 11040 SAMHSA-listed Opioid Treatment Program Nassau Health Care Corporation East Meadow, NY 11554 SAMHSA-listed Opioid Treatment Program · for-profit Triumph Treatment LLC Long Beach, NY 11561 SAMHSA-listed12-step facilitationAdults

Detox Centers in Nassau County

10 providers in Nassau County: Bethpage, Hicksville, Hempstead, Valley Stream, New Hyde Park, East Meadow

Psychiatric Hospitals in Nassau County

5 providers in Nassau County: Rockville Centre, Freeport, West Hempstead, Garden City

Psychiatric Hospital · non-profit Mercy Medical Center Rockville Centre, NY 11570 SAMHSA-listedAbnormal involuntary movement scaleActivity therapy Psychiatric Hospital · non-profit New Hope Freeport, NY 11520 SAMHSA-listed12-step facilitationAccepts clients using MAT but prescribed elsewhere Psychiatric Hospital · non-profit Northwell Health West Hempstead, NY 11552 SAMHSA-listedAcamprosate (Campral®)Adults Psychiatric Hospital · non-profit Northwell Health System Garden City, NY 11530 SAMHSA-listedAcamprosate (Campral®)Accepts clients using MAT but prescribed elsewhere Psychiatric Hospital · non-profit Recovery House Garden City, NY 11530 SAMHSA-listed12-step facilitationAcamprosate (Campral®)

Drug & Alcohol Rehab in Nassau County

22 providers in Nassau County: Freeport, Glen Cove, Hempstead, Baldwin, Long Beach, East Meadow, Valley Stream, Roosevelt

Mental Health Treatment in Nassau County

17 providers in Nassau County: Inwood, Plainview, Glen Cove, East Meadow, Old Bethpage, Hempstead, Garden City, West Hempstead

How to choose care in Nassau County

Compare providers on the care they deliver, not on a ranking. Look at the levels of care offered, whether medications for opioid use disorder are available, the populations served, payment and insurance options, and the current licensing status of each program.

When you are choosing for yourself or someone you care for in Nassau County, call ahead to confirm current availability, intake requirements, accepted insurance or payment, and whether the program is licensed or certified. Ask what happens if someone needs a higher or lower level of care.

Frequently asked questions

How many care providers are in Nassau County?

According to the current SAMHSA FindTreatment.gov data, Nassau County, New York has 58 listed providers: 4 opioid treatment programs, 10 detox centers, 5 psychiatric hospitals, 0 sober living homes, 22 drug & alcohol rehab, and 17 mental health treatment.

Which cities in Nassau County have care providers?

Baldwin, Bethpage, East Meadow, Elmont, Freeport and others list care providers in the current data. Open a city page for local listings.

Data sources

Sources: SAMHSA FindTreatment.gov. Processing date: 2026-10-08.

Required disclosures

For general information only, not medical advice. This website shares public data and general information. It does not offer medical advice, diagnosis, or treatment guidance, and it cannot replace a consultation with a qualified health care professional.

Independent and unaffiliated. RehabProviders.org is a private, independently run directory. It is not affiliated with, nor endorsed or operated by, the Substance Abuse and Mental Health Services Administration (SAMHSA), the U.S. Department of Health and Human Services, or any government agency. SAMHSA has not reviewed or endorsed this site.

Confirm details before acting. Facility records come from public federal datasets and may lag or contain errors. These listings are unrated; always verify current services, licensing, availability, and cost directly with the provider.

In a crisis, get help now. Call or text 988 to reach the 988 Suicide & Crisis Lifeline, or call the SAMHSA National Helpline at 1-800-662-4357.

Certain outbound links on this site are partner or affiliate links. If you use them we may receive a commission, and your price does not change. This never influences the data we publish.