Psychologist | Clinical Psychology

Dr. Gerard Thomas Mcnicholas, PSY.D.

3760 Expressway Dr S Fl 1, Islandia, New York, 11749-5522

About Dr. Gerard Thomas Mcnicholas

Dr. Gerard Thomas Mcnicholas is a psychologist based in Islandia, New York who is specialized in Clinical Psychology. Active license number of Dr. Gerard Thomas Mcnicholas is 023665 for Clinical Psychology in New York. His current practice location is 3760 Expressway Dr S Fl 1, Islandia. Patients can contact him at 516-302-7599. Dr. Gerard Thomas Mcnicholas, PSY.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1558995613.

Dr. Gerard Thomas Mcnicholas 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). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Gerard Thomas Mcnicholas'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. Gerard Thomas Mcnicholas
Specialization Clinical Psychology
Credentials PSY.D.
Gender Male
Practice Address: 3760 Expressway Dr S Fl 1,
Islandia, NY - 11749-5522

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 Number1558995613
NPI Enumeration Date: 27 Feb, 2020
NPI Last Update On: 27 Feb, 2020

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. Gerard Thomas Mcnicholas are as mentioned below.

License NumberSpecializationStateStatus
023665Clinical 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. Gerard Thomas Mcnicholas
3760 Expressway Dr S Fl 1,
Islandia, NY - 11749-5522
Phone: 516-302-7599

Book an Appointment with Dr. Gerard Thomas Mcnicholas

To schedule an appointment, contact Dr. Gerard Thomas Mcnicholas at 3760 Expressway Dr S Fl 1, Islandia, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Gerard Thomas Mcnicholas:

Dr. Gerard Thomas Mcnicholas is a psychologist specializing in Clinical Psychology. He 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). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Yes, Dr. Gerard Thomas Mcnicholas 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. Gerard Thomas Mcnicholas practices at 3760 Expressway Dr S Fl 1, Islandia, New York, 11749-5522.

To schedule an appointment with Dr. Gerard Thomas Mcnicholas, please contact the office at 516-302-7599.

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