Psychologist | Clinical Psychology

Dr. Mathew Colin Williams, PH.D.

79 Middleville Rd, Northport, New York, 11768-2200

About Dr. Mathew Colin Williams

Dr. Mathew Colin Williams is a psychologist based in Northport, New York who is specialized in Clinical Psychology. Active license number of Dr. Mathew Colin Williams is 017560-1 for Clinical Psychology in New York. His current practice location is 79 Middleville Rd, Northport. Patients can contact him at 631-261-4400. Dr. Mathew Colin Williams, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1831252204.

Dr. Mathew Colin Williams 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. Mathew Colin Williams'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. Mathew Colin Williams
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 79 Middleville Rd,
Northport, NY - 11768-2200

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 Number1831252204
NPI Enumeration Date: 18 Dec, 2006
NPI Last Update On: 08 Apr, 2008

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. Mathew Colin Williams are as mentioned below.

License NumberSpecializationStateStatus
017560-1Clinical 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. Mathew Colin Williams
74 Orion Walk,
Holbrook, NY - 11741-4922
Phone: 631-487-4234

Book an Appointment with Dr. Mathew Colin Williams

To schedule an appointment, contact Dr. Mathew Colin Williams at 79 Middleville Rd, Northport, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Mathew Colin Williams:

Dr. Mathew Colin Williams 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. Mathew Colin Williams 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. Mathew Colin Williams practices at 79 Middleville Rd, Northport, New York, 11768-2200.

To schedule an appointment with Dr. Mathew Colin Williams, please contact the office at 631-261-4400.

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