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Program Directory · Program record

Mather Hospital Adolescent Partial Hospitalization Program (PHP) and Intensive Outpatient Program (IOP)

Port Jefferson, New York · Part of Mather Hospital / Northwell Health

Level of care: Partial hospitalization (PHP), Intensive outpatient (IOP)
Ages: 12 to 17
Insurance: Most major insurance plans, Medicaid

Listed as operating. 3 sources, newest retrieved May 23, 2026. Record researched May 23, 2026.

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Published program summary

Long Island (Suffolk County) hospital-based Adolescent PHP (full-day, 5 days/week) and IOP (after-school, 3-4 days/week) programs for ages 12-17. Comprehensive DBT and CBT informed care, groups, family involvement, medication management, case management, and school support. Serves as intensive community-based treatment option to prevent or step-down from inpatient/residential care. Located at Highlands Boulevard; part of Mather Hospital's behavioral health services (inpatient geriatric and adult, plus adolescent tracks).

Services and populations

Genders served: All genders
Specialties: Adolescent mental health and behavioral issues, Depression, anxiety, mood disorders, suicidal ideation, Co-occurring substance use, Family and school support
Modalities: Dialectical Behavior Therapy (DBT), Cognitive Behavioral Therapy (CBT), Group therapy and process groups, Individual therapy, Family therapy and education, Medication management and psychiatric services, Case management and discharge planning, School liaison and academic support

Admissions

Hours: Crisis coverage, 24 hours a day, 7 days a week by a member of the professional staff
Typical length of stay: PHP: full-day 5 days/week; IOP: 3-4 days/week after school; duration individualized (typically weeks)

Daily life and family

Family involvement: Individual, family and group therapy

Insurance and payment

Insurance listed: Most major insurance plans, Medicaid
Payment notes: Hospital-based programs; verify insurance, prior authorization, and any transportation assistance directly with the program.

Credentials and public record

Accreditation: Mather Hospital, Northwell Health affiliate
Public record: Not yet checked
Check with the state: New York OASAS certified program search. The state runs or links this lookup. It may not list every program type.

Location

Address: 100 Highlands Boulevard, Suite 201, Port Jefferson, NY 11777 (Long Island)
County: Suffolk County

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Sources

Provider website · Source date May 23, 2026
Provider website · Source date May 23, 2026
OMH reference (program listing context) · Source date May 23, 2026

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