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Behavioral Health Services
  -Inpatient Adult
 Psychiatric Services
  -Inpatient Adolescent
 Psychiatric Services
  -Adult Partial
 Hospitalization
  -Adolescent Partial
 Hospitalization
  -Adolescent Intensive
 Outpatient Program
  -Eating Disorders Program
  -Mental Health Clinic
  -Outpatient Chemical
 Dependency Clinic
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Behavioral Health Services   

Mather is one of a few hospitals on Long Island to offer a continuum of inpatient and outpatient behavioral health services for both adolescents and adults. It is the only acute care hospital in Suffolk County with an adolescent psychiatric unit and an adolescent partial hospitalization program.

Our psychiatric programs include an Inpatient Adult Psychiatric Unit, an Inpatient Adolescent Psychiatric Unit,
an Adult Partial Hospitalization Program and an Adolescent Partial Hospitalization Program.

Our outpatient programs also include a Mental Health Clinic, an Eating Disorders Program and a Chemical Dependency Program.

The Behavioral Health Services staff consists of psychiatrists, psychiatric nurse practitioners, psychiatric nurses, mental health technicians, licensed clinical social workers, recreation therapists and certified alcohol and substance abuse counselors trained to help you with your particular issue.

To learn more about our programs, contact Behavioral Health Services at one of the numbers  below.

Inpatient Services
Mather Hospital, 75 North Country Road, Port Jefferson

  • Inpatient Adult Psychiatric – 631-476-2830
  • Inpatient Adolescent Psychiatric – 631-476-2775

Outpatient Services
100 Highlands Blvd., Port Jefferson, Suite 201

  • Partial Hospitalization for Adolescents and Adults – 631-473-3877
  • Eating Disorder Program for Adolescents and Adults – 631-473-3877

100 Highlands Blvd, Port Jefferson, Suite 101

  • Chemical Dependency Clinic – 631-331-8200

125 Oakland Ave., Port Jefferson, Suite 303

  • Outpatient Mental Health Clinic – 631-729-2140
  • Outpatient Psychiatric Physician Services – 631-928-3122