Psychologist | Clinical Psychology

Dr. Gregory Daniel Haggerty, PH.D.

627 Broadway Ste 200, Massapequa, New York, 11758-5031

About Dr. Gregory Daniel Haggerty

Dr. Gregory Daniel Haggerty is a psychologist based in Massapequa, New York who is specialized in Clinical Psychology. Active license number of Dr. Gregory Daniel Haggerty is 018419 for Clinical Psychology in New York. His current practice location is 627 Broadway Ste 200, Massapequa. Patients can contact him at 516-551-8655. Dr. Gregory Daniel Haggerty, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1881910016.

Dr. Gregory Daniel Haggerty 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. Gregory Daniel Haggerty'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. Gregory Daniel Haggerty
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 627 Broadway Ste 200,
Massapequa, NY - 11758-5031

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 Number1881910016
NPI Enumeration Date: 13 Apr, 2010
NPI Last Update On: 13 Apr, 2010

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. Gregory Daniel Haggerty are as mentioned below.

License NumberSpecializationStateStatus
018419Clinical 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. Gregory Daniel Haggerty
320 1st Ave,
Massapequa Park, NY - 11762-1849
Phone: 516-551-8655

Book an Appointment with Dr. Gregory Daniel Haggerty

To schedule an appointment, contact Dr. Gregory Daniel Haggerty at 627 Broadway Ste 200, Massapequa, New York or call the phone number listed below.

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Frequently Asked Questions

Below are some commonly asked questions about Dr. Gregory Daniel Haggerty:

Dr. Gregory Daniel Haggerty 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. Gregory Daniel Haggerty 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. Gregory Daniel Haggerty practices at 627 Broadway Ste 200, Massapequa, New York, 11758-5031.

To schedule an appointment with Dr. Gregory Daniel Haggerty, please contact the office at 516-551-8655.

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