Psychologist | Clinical Psychology

Dr. William John Farrell, PH.D

7 High St, Ste. 207, Huntington, New York, 11743-7605

About Dr. William John Farrell

Dr. William John Farrell is a psychologist based in Huntington, New York who is specialized in Clinical Psychology. Active license number of Dr. William John Farrell is 6601 for Clinical Psychology in New York. His current practice location is 7 High St, Ste. 207, Huntington. Patients can contact him at 631-423-2767 or can fax him at 631-424-0991. Dr. William John Farrell, PH.D, specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1023221348.

Dr. William John Farrell 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. William John Farrell'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. William John Farrell
Specialization Clinical Psychology
Credentials PH.D
Gender Male
Practice Address: 7 High St, Ste. 207
Huntington, NY - 11743-7605
Fax 631-424-0991

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 Number1023221348
NPI Enumeration Date: 07 May, 2007
NPI Last Update On: 09 Oct, 2012

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. William John Farrell are as mentioned below.

License NumberSpecializationStateStatus
6601Clinical 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. William John Farrell
7 High St, Ste. 207
Huntington, NY - 11743-7605
Phone: 631-423-2767
Fax: 631-424-0991

Book an Appointment with Dr. William John Farrell

To schedule an appointment, contact Dr. William John Farrell at 7 High St, Ste. 207, Huntington, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. William John Farrell:

Dr. William John Farrell 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. William John Farrell 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. William John Farrell practices at 7 High St, Ste. 207, Huntington, New York, 11743-7605.

To schedule an appointment with Dr. William John Farrell, please contact the office at 631-423-2767.

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