Northwell Health Mather Hospital
100 Highlands Boulevard, Port Jefferson, NY 11777
✓ Joint Commission 2 care levels
(833) 567-5838
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.
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.
Who This Center Serves
Men
Men and Women
Women
Adolescents
Children
Older Adults
Young Adults
Girls
Boys
Services Offered
What to Expect at Northwell Health Mather Hospital
1. Initial Assessment
A clinical team evaluates your history, needs, and goals to create a personalized plan.
2. Active Treatment
Evidence-based therapies including 1-on-1 Counseling and Cognitive Behavioral Therapy, typically 7 days.
3. Progress & Recovery
Regular progress reviews, skill-building sessions, and adjustment of your treatment plan.
4. Aftercare Planning
Continued support, relapse prevention strategies, and connections to community resources for lasting recovery.
Contact Information
Quick Facts
| Program | 7 days |
| Focus | This center treats mental heal... |
| Insurance | 24 accepted |
| Accreditation | Joint Commission |
Therapies & Methods
Treatment Philosophy
Individual Treatment
Twelve Step
Family Involvement
Conditions & Substances Treated
Co-Occurring Disorders
Drug Addiction
Chronic Relapse
Smoking Cessation
Insurance Accepted
Northwell Health Mather Hospital works with 24 insurance providers.
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Free verification · Know your costs before you commit
Frequently Asked Questions
Need Help Choosing the Right Center?
Our counselors are available 24/7 to help you find the right program.
(833) 567-5838Free · Confidential · No Obligation
Information last verified: April 2026 · Data sourced from SAMHSA