Psychologist | Clinical Psychology

Dr. Justine Alexis Mahler, PSY.D.

283 Commack Rd Ste 210, Commack, New York, 11725-3400

About Dr. Justine Alexis Mahler

Dr. Justine Alexis Mahler is a psychologist based in Commack, New York who is specialized in Clinical Psychology. Active license number of Dr. Justine Alexis Mahler is P139348 for Clinical Psychology in New York. Her current practice location is 283 Commack Rd Ste 210, Commack. Patients can contact her at 631-901-5253. Dr. Justine Alexis Mahler, PSY.D., specializes in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1356219133.

Dr. Justine Alexis Mahler is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Justine Alexis Mahler's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Justine Alexis Mahler
Specialization Clinical Psychology
Credentials PSY.D.
Gender Female
Practice Address: 283 Commack Rd Ste 210,
Commack, NY - 11725-3400

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1356219133
NPI Enumeration Date: 24 Oct, 2025
NPI Last Update On: 24 Oct, 2025

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Justine Alexis Mahler are as mentioned below.

License NumberSpecializationStateStatus
P139348Clinical Psychology New YorkPrimary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Justine Alexis Mahler
283 Commack Rd Ste 210,
Commack, NY - 11725-3400
Phone: 631-901-5253

Book an Appointment with Dr. Justine Alexis Mahler

To schedule an appointment, contact Dr. Justine Alexis Mahler at 283 Commack Rd Ste 210, Commack, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Justine Alexis Mahler:

Dr. Justine Alexis Mahler is a psychologist specializing in Clinical Psychology. She is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Yes, Dr. Justine Alexis Mahler is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Justine Alexis Mahler practices at 283 Commack Rd Ste 210, Commack, New York, 11725-3400.

To schedule an appointment with Dr. Justine Alexis Mahler, please contact the office at 631-901-5253.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.