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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William Chen, LAC

Acupuncturist in San Mateo, CA · enumerated 2006.

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

National Provider Identifier

1417013939

Verified

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Registry record

Entity type Individual (Type 1)
Name William Chen
Credential LAC
Sex Male
Practice address San Mateo, CA, 94401
Phone (650) 235-6761
Fax (650) 685-8081
Enumeration date Dec 29, 2006
Last updated in NPPES Mar 5, 2012

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

Taxonomy & licenses

171100000X Acupuncturist Other Service Providers · License AC9853 (CA) Primary
LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC credential

Other identifiers

Identifier Type State Issuer
615659000 Other - FECA

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.

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Frequently asked questions

Where does William Chen practice?
The practice location on file with NPPES is in San Mateo, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Chen?
The National Provider Identifier (NPI) for William Chen is 1417013939, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-05.