Quannacut Inpatient Addiction Services

Detoxification and rehabilitation: integrated treatment that’s advancing recovery.

At Stony Brook Eastern Long Island Hospital (SBELIH), we have one of the most highly regarded inpatient behavioral health programs in Suffolk County. If you, or someone you love, are considering treatment for substance use or mental health challenges, we can help. By combining the highest caliber medicine, psychology and behavioral therapy, our highly trained board-certified physicians, nurses, alcoholism and substance abuse counselors, social workers, creative arts therapists, and dieticians are customizing solutions for each patient. This approach is at the forefront of modern treatment for substance use disorders. For many, entering Quannacut (the Native American word for rainbow – signifying hope) is the beginning of a new life. We embrace this decision and congratulate such courage.

Inpatient Services

Our inpatient programs provide comprehensive care, including detoxification, rehabilitation, and psychiatric services in a healing and therapeutic environment. All programs offer medication for opiate use disorders and medication for alcohol use disorders, with services accredited by the Joint Commission of Accreditation and licensed by the New York State Office of Mental Health and/or New York State Office of Addiction Services and Services.

Quannacut Rehabilitation:
Provides comprehensive treatment incorporating evidence-based education practices, mindfulness, life skills, medication management, group and individual counseling, and discharge planning in a supportive environment.

Quannacut Detoxification:
Provides safe medical detoxification from substances with comprehensive treatment, discharge planning and medication management.


Lloyd Simon, MD
Medical Director & Chief of Addiction Medicine, SBELIH
Diplomate, American Board of Internal Medicine
Diplomate, American Society of Addiction Medicine

Jarid Pachter, DO 
SBUH Medical Board
Medical Director of Quannacut Outpatient Services
Diplomate, American Osteopathic Association, Family Medicine
Diplomate, American Society of Addiction Medicine

Riverhead: (631) 369-8966 / Southold: (631) 734-8742

Douglas K. Hoverkamp, MD
Director, Department of Psychiatry, SBELIH
Psychiatric Director, Quannacut Outpatient Services
Diplomate, American Board of Psychiatry
Greenport: (631) 477-6890

Call For Appointments
(631) 477-8877
Intake assessments are completed Monday to Friday, 7 am to 7 pm
(631) 477-5234
Detoxification assessments are available 24 hours per day, 7 days per week through the Emergency Department
(631) 477-5325
Inpatient Psychiatry
(631) 477-5265
(631) 477-5268
Quannacut Outpatient Services
(631) 369-8966