Psychologist

Dr. Mark A Williams, PH.D.

3102 E. Highland Avenue, Medical Staff Office, Patton, California, 92369

About Dr. Mark A Williams

Dr. Mark A Williams is a psychologist based in Patton, California who is specialized in Psychology. His current practice location is 3102 E. Highland Avenue, Medical Staff Office, Patton. Patients can contact him at 909-425-7679 or can fax him at 909-425-6635. Dr. Mark A Williams, PH.D., specializes in Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1699922112.

Dr. Mark A Williams is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, he performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. He can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Practice Information

Dr. Mark A 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. Mark A Williams
Specialization Psychology
Credentials PH.D.
Gender Male
Practice Address: 3102 E. Highland Avenue, Medical Staff Office
Patton, CA - 92369
Fax 909-425-6635

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 Number1699922112
NPI Enumeration Date: 27 Aug, 2008
NPI Last Update On: 29 Jul, 2013

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. Mark A Williams are as mentioned below.

License NumberSpecializationStateStatus
Psychology Primary
Forensic Psychology Secondary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Mark A Williams
3102 E. Highland Avenue, Medical Staff Office
Patton, CA - 92369
Phone: 909-425-7679
Fax: 909-425-6635

Book an Appointment with Dr. Mark A Williams

To schedule an appointment, contact Dr. Mark A Williams at 3102 E. Highland Avenue, Medical Staff Office, Patton, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Mark A Williams:

Dr. Mark A Williams is a psychologist specializing in Psychology. He is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, he performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. He can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Yes, Dr. Mark A 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. Mark A Williams practices at 3102 E. Highland Avenue, Medical Staff Office, Patton, California, 92369.

To schedule an appointment with Dr. Mark A Williams, please contact the office at 909-425-7679.

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