Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Wei Ming Chen, MD

Q: What is the NPI number for William Chen?

The National Provider Identifier (NPI) for William Chen is 1851498372, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in San Pablo, CA · enumerated 2006.

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

National Provider Identifier

1851498372

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Registry record

Entity type Individual (Type 1)

Name William Wei Ming Chen

Credential MD

Sex Male

Practice address 2089 Vale Rd, #34, San Pablo, CA, 94806

Phone (510) 235-9247

Fax (510) 235-9248

Enumeration date Sep 19, 2006

Last updated in NPPES Nov 5, 2009

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License A070200 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A070200 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A702000	Other	-	BS OF CA
431996194	Other	-	BC OF CA
A702000	Medicaid	CA	-

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

What is the NPI number for William Chen?

The National Provider Identifier (NPI) for William Chen is 1851498372, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Chen practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-05.