905 East Main Street, Riverhead, NY 11901
Located at 905 East Main Street in Riverhead, New York, University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP is a nonprofit addiction treatment provider. The Stony Brook Medicine/Quannacut OP program is operated by University Hospital/Stony Brook ELIH.
Its services include standard outpatient counseling, medication-assisted treatment (MAT), co-occurring (dual diagnosis) mental health treatment, transitional or sober housing, and telehealth therapy. Clinicians use approaches such as anger management, brief intervention, cognitive behavioral therapy, motivational interviewing, and relapse prevention. For opioid use disorder, the program uses buprenorphine and naltrexone. It also prescribes medication for alcohol use disorder.
For payment, the facility accepts government funding for substance use treatment, IHS/Tribal/Urban (ITU) funds, Medicare, Medicaid, private health insurance, and cash or self-payment. A sliding fee scale based on income is available. Coverage depends on your specific plan, so verify benefits before admission.
The program accepts children/adolescents, young adults, adults, and seniors. It offers specialized groups for adolescents, young adults, clients with co-occurring mental and substance use disorders, and clients who have experienced trauma. Services are available in Spanish. Sign language services are available for deaf and hard-of-hearing clients.
University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP is accredited by The Joint Commission and licensed or certified by the state substance use treatment agency, state department of health, and drug Enforcement Agency (DEA).
Support services include aftercare/continuing care, discharge planning, naloxone and overdose education, and outcome follow-up after discharge.
Sliding fee scale (fee is based on income and other factors)
| Licensing & accreditation | State substance use treatment agency, State department of health, The Joint Commission, Drug Enforcement Agency (DEA) |
|---|---|
| Ages accepted | Children/Adolescents, Young Adults, Adults, Seniors |
| Language services | Sign language services for the deaf and hard of hearing, Spanish |
| Operated by | Private non-profit organization |
| Exclusive services | Specially designed program for DUI/DWI clients |
905 East Main Street
Riverhead, NY 11901
Facility's own contact631-369-8966 · elih.stonybrookmedicine.edu
University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP lists the following levels of care: outpatient, medication-assisted treatment (MAT), dual diagnosis, sober living / transitional housing, and telehealth. Services can change, so confirm current programs before admission.
According to SAMHSA data, University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP accepts government funding for substance use treatment, ihs/tribal/urban (itu) funds, medicare, medicaid, private health insurance, and cash or self-payment. Your exact coverage depends on your plan and network status. You can check your benefits with your insurer, or call (877) 847-2855 for a free benefits check.
University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP does not list detox services. If you need medically supervised withdrawal first, see detox programs or call (877) 847-2855 for help finding one.
Yes. University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP reports accreditation from The Joint Commission. Accreditation means the facility meets independent quality and safety standards.
University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP accepts children/adolescents, young adults, adults, and seniors. Specialized groups include adolescents, young adults, adult women, adult men, and clients with co-occurring mental and substance use disorders.
Admission usually starts with a phone screening and insurance check, followed by an assessment. You can contact University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP directly at 631-369-8966. To compare University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP with other options and verify your insurance, call our admissions helpline at (877) 847-2855. Our helpline is not affiliated with University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP.
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Riverhead, NY 11901
Joint Commission accredited
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“Get help” calls our free helpline, not this facility.
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Hampton Bays, NY 11946
Joint Commission accredited
Levels of care
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“Get help” calls our free helpline, not this facility.
Hampton Bays, NY 11946
Levels of care
Payment accepted
Medicaid · Private insurance · TRICARE +3 more
“Get help” calls our free helpline, not this facility.
Source: SAMHSA FindTreatment.gov, data updated October 2026. Facilities report this information to SAMHSA, and it can change, so confirm details before admission. A listing is not an endorsement. StartDrugRehab is not affiliated with University Hospital/Stony Brook ELIH – Stony Brook Medicine/Quannacut OP.
