DR. MARK A WILLIAMS PH.D. NPI 1699922112

NPI Information

  • NPI: 1699922112
  • Provider Name: DR. MARK A WILLIAMS, PH.D.
  • Classification: Clinical Neuropsychologist - 103G00000X
  • Entity Type: Individual
  • Address: 3102 E. HIGHLAND AVENUE
    MEDICAL STAFF OFFICE
    PATTON, CA
    ZIP 92369
  • Phone: (909) 425-7679

Map and Directions

Get Directions

NPI Details

DR. Mark A Williams, PH.D. is a clinical neuropsychologist in Patton, CA. The provider is a clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems. DR. Mark A Williams, PH.D. NPI is 1699922112. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

The provider's business location address is:

3102 E. HIGHLAND AVENUE
MEDICAL STAFF OFFICE
PATTON, CA
ZIP 92369
Phone: (909) 425-7679
Fax: (909) 425-6635

The enumeration date for this NPI number is 8/27/2008 and was last updated on 7/29/2013.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
1103TF0200XPsychologistForensicNo
2103G00000XClinical NeuropsychologistYes

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

NPI Synchronization or Removal

All materials and services on this site are provided on an "as is" and "as available" basis without warranty of any kind. The NPI record is maintained by the National Plan & Provider Enumeration System (NPPES) and anyone may request this information and other NPPES health care provider data from HHS under The Freedom of Information Act (FOIA), Title 5 of the United States Code, section 552. To update the NPI records please contact the NPPES.

Previous NPI
Next NPI