Psychologist | Clinical Psychology

Dr. William Walter Clark, PHD

2110 Gallows Rd # B, Vienna, Virginia, 22182-3962

About Dr. William Walter Clark

Dr. William Walter Clark is a psychologist based in Vienna, Virginia who is specialized in Clinical Psychology. Active license number of Dr. William Walter Clark is 0810002215 for Clinical Psychology in Virginia. His current practice location is 2110 Gallows Rd # B, Vienna. Patients can contact him at 703-506-8378 or can fax him at 703-893-1011. Dr. William Walter Clark, PHD, specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1972716702.

Dr. William Walter Clark 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 Walter Clark'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 Walter Clark
Specialization Clinical Psychology
Credentials PHD
Gender Male
Practice Address: 2110 Gallows Rd # B,
Vienna, VA - 22182-3962
Fax 703-893-1011

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 Number1972716702
NPI Enumeration Date: 08 May, 2007
NPI Last Update On: 08 Jul, 2007

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 Walter Clark are as mentioned below.

License NumberSpecializationStateStatus
0810002215Clinical Psychology VirginiaPrimary

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 Walter Clark
1514 Thurber St,
Herndon, VA - 20170-2565
Phone: 703-904-9046

Book an Appointment with Dr. William Walter Clark

To schedule an appointment, contact Dr. William Walter Clark at 2110 Gallows Rd # B, Vienna, Virginia or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. William Walter Clark:

Dr. William Walter Clark 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 Walter Clark 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 Walter Clark practices at 2110 Gallows Rd # B, Vienna, Virginia, 22182-3962.

To schedule an appointment with Dr. William Walter Clark, please contact the office at 703-506-8378.

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