Skip to content
Free & Confidential 24/7 (855) 999-HELP

Verified Treatment Center

Northwell Health Mather Hospital

Port Jefferson, NY · 11777

SAMHSA Verified Joint Commission Outpatient MAT Dual Dx
Specializes in Dual Diagnosis Adolescent

Key Takeaways for Northwell Health Mather Hospital

  • Outpatient · MAT · Dual Dx offered
  • Accepts Medicaid, Medicare, Private insurance
  • Joint Commission accredited · SAMHSA-listed facility
  • Direct line available · Helpline free & confidential 24/7

About Northwell Health Mather Hospital

Northwell Health Mather Hospital provides comprehensive behavioral health services for both adults and adolescents who are dealing with significant psychiatric symptoms. The center offers a partial hospitalization program (PHP), which serves as a structured level of care for individuals who do not require a full inpatient stay but need more support than traditional outpatient therapy. This program is designed to be a step-down from an inpatient unit or to help prevent the need for hospitalization altogether. They offer a safe and therapeutic environment for individuals to focus on their mental health and recovery during the day while returning home in the evenings.
The treatment at the center is built around a collaborative and individualized plan, created with input from the client, their family, and their referring doctor. A variety of therapeutic methods are used, including individual, group, and family therapy sessions. Through these therapies, clients work on developing better coping strategies to handle daily stressors, learn to effectively manage their psychiatric symptoms, and gain a deeper understanding of their mental and emotional health. The goal is to empower each person with the skills needed for independent functioning and long-term wellness in a supportive setting.
A distinctive aspect of the program is its structured, full-day schedule, which runs from Monday through Friday, providing consistency and intensive care. For adolescents, the program integrates educational services, including tutoring, to ensure they can keep up with their schoolwork while receiving treatment. Furthermore, professional staff are available for crisis coverage 24 hours a day, 7 days a week, ensuring that support is always accessible for clients and their families when it is needed most, providing a crucial safety net.

Listing sourced from the SAMHSA Behavioral Health Treatment Services Locator. Data last synced April 2026. Verify current programs directly with the facility.

Northwell Health Mather Hospital at a Glance

Levels of care

Outpatient · MAT · Dual Dx

Service settings

Outpatient

Therapy approaches

Cognitive behavioral therapy, Couples/family therapy, Dialectical behavior therapy, Group therapy, Integrated Mental and Substance Use Disorder treatment, Individual psychotherapy

Age groups

Children/Adolescents, Young Adults, Adults, Seniors

Special populations

Clients with co-occurring mental and substance use disorders

Medications

Olanzapine, Quetiapine, Risperidone, Nicotine replacement, Non-nicotine smoking/tobacco cessation, Antipsychotics used in treatment of SMI

Insurance & Payment Accepted

Confirm in-network status before admission — verification is free.

Private insurance

Coverage details →

TRICARE / VA

Contact & Location

Address

100 Highlands Boulevard, Port Jefferson, NY 11777

Facility direct line

(631) 473-3877