Stony Brook Eastern Long Island Hosp

Stony Brook Eastern Long Island Hospital (SBELIH) sits at 201 Manor Place in Greenport, New York, in Suffolk County, and houses one of the region’s inpatient addiction treatment programs under the name Quannacut Inpatient Addiction Services. The hospital is part of the Stony Brook Medicine health system and holds Joint Commission (JCAHO) accreditation, positioning it as a premier provider of behavioral healthcare and substance use treatment for Eastern Long Island. For individuals or families facing a substance use crisis and needing medically supervised care, this is a hospital-based option operating around the clock.

The facility provides two levels of care: medical detox and residential treatment. The medical detox program offers withdrawal management within a hospital setting, with 24/7 availability every day of the week. Following detox, patients can transition into the residential treatment program, allowing for an integrated continuum of inpatient care rather than requiring a separate facility admission. This structure — detoxification and rehabilitation under one roof — is described on the facility’s own site as integrated treatment advancing recovery.

Clinically, the program addresses co-occurring disorders and dual diagnosis alongside substance use, recognizing that psychiatric conditions and addiction frequently present together. Trauma and PTSD are also among the conditions treated. Cognitive Behavioral Therapy (CBT) is a confirmed therapeutic method used within the program. The facility serves both men and women, and accommodates individuals who are deaf or hard of hearing.

Quannacut Inpatient Addiction Services accepts a broad range of payment sources, including Medicaid, Medicare, private insurance, state insurance, and self-pay or cash, reducing financial barriers for those who need immediate access to inpatient detox or residential care. The Joint Commission accreditation signals that the program meets rigorous national standards for clinical quality. For adults on the North Fork, Shelter Island, or broader Eastern Long Island area seeking hospital-based medical detox and residential treatment, SBELIH represents a locally accessible, accredited option available every day of the year.

The Quannacut Inpatient Addiction Services program at Stony Brook Eastern Long Island Hospital provides medical detox within a hospital environment in Greenport, NY. Because it operates 24 hours a day, seven days a week, individuals who need medically supervised withdrawal management do not have to wait for a weekday opening or navigate urgent care. The hospital setting means clinical oversight is immediately available throughout the detox process.

After completing medical detox, patients can move directly into the residential treatment program without leaving the facility. This continuity — moving from withdrawal management into structured inpatient rehabilitation in a single, integrated program — is a practical advantage for people who might otherwise face a gap between detox discharge and their next level of care.

Many people entering a detox or residential program are also managing psychiatric conditions. Quannacut Inpatient Addiction Services at SBELIH is structured to treat co-occurring disorders and dual diagnosis, meaning staff address both substance use and underlying mental health conditions as part of the same inpatient stay. Trauma and PTSD are specifically listed among the conditions treated.

Cognitive Behavioral Therapy (CBT) is a confirmed therapeutic method used in the program. Treating the full clinical picture — not just the substance use in isolation — is central to how SBELIH describes its integrated approach to inpatient addiction care on Eastern Long Island.

The program serves adult men and women, and is one of the few inpatient detox and residential programs in the region that explicitly accommodates individuals who are deaf or hard of hearing. Services are provided in English. The program is operated by Stony Brook Medicine, a major academic health system, giving it access to clinical infrastructure that standalone detox centers may not have.

Payment options at Quannacut Inpatient Addiction Services include Medicaid, Medicare, private insurance, state insurance, and self-pay or cash. This range of accepted payment sources makes the program financially accessible to a wide cross-section of people on Eastern Long Island who need inpatient detox or residential addiction treatment. To reach the facility directly, call (631) 477-5710.

Stony Brook Eastern Long Island Hospital holds accreditation from The Joint Commission (JCAHO), the national body that evaluates hospitals and behavioral health programs against standardized clinical and safety benchmarks. For families researching detox centers and trying to assess quality quickly, JCAHO accreditation is one of the clearest independent signals that a program meets rigorous operational and clinical standards.

The Quannacut program is described by SBELIH itself as a premier provider of behavioral healthcare and substance use treatment for Eastern Long Island — and the accreditation supports that positioning. For anyone making a same-day or emergency decision about inpatient detox, knowing the program is hospital-based, continuously staffed, and Joint Commission-accredited narrows the decision considerably.