Dr. Bruce Warren Williams, PH.D.

Dr. Bruce Warren Williams is a Intellectual & Developmental Disabilities Psychologist provider (Psychologist) practicing in Pasadena, CA, registered in the NPPES registry with NPI 1841492675 since 2007. The credential PHD stands for Doctor of Philosophy.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1841492675
Entity type	Individual (Type 1)
Name	Dr. Bruce Warren Williams
Credential	PH.D.
Sex	Male
Practice address	Pasadena, CA, 91106
Phone	6267926455
Fax	2137635636
Enumeration date	2007-06-04
Last updated in NPPES	2007-07-08

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103TM1800X	Intellectual & Developmental Disabilities Psychologist	Primary	PSY12785	CA

PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Copy-ready billing details

Provider: Bruce Williams, PH.D.
NPI: 1841492675
Taxonomy: 103TM1800X (Intellectual & Developmental Disabilities Psychologist)
Address: Pasadena, CA, 91106

Verify this record

Cross-check NPI 1841492675 against the authoritative CMS record: view Dr. Bruce Warren Williams on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

Where does Bruce Williams practice?

The practice location on file with NPPES is in Pasadena, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Bruce Williams?

The National Provider Identifier (NPI) for Bruce Williams is 1841492675, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.