Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Richard B Williams Phd MD Inc

Internal Medicine Physician in South Pasadena, CA · enumerated 2008 · authorized official Richard Williams, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1225289788

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Registry record

Entity type Organization (Type 2)

Legal business name Richard B Williams Phd MD Inc

Practice address 630 Mission St, Suite 1, South Pasadena, CA, 91030

Phone (626) 799-3616

Fax (626) 799-4001

Enumeration date Oct 2, 2008

Last updated in NPPES Oct 2, 2008

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G58242 (CA) Primary

Authorized official

Name Richard Williams

Title President

Phone (626) 799-3616

Other identifiers

Identifier	Type	State	Issuer
PRESIDENT LICENSE#	Other	CA	G58242

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 → Validate an NPI →

Frequently asked questions

Where is Richard B Williams Phd MD Inc located?

The practice location on file with NPPES is in South Pasadena, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-10-02. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-02.