Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles D Chan

Family Medicine Physician in Pleasanton, CA · enumerated 2026.

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

National Provider Identifier

1063353704

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Registry record

Entity type Individual (Type 1)

Name Charles D Chan

Sex Male

Practice address 4473 Willow Rd Ste 220, Pleasanton, CA, 94588

Phone (925) 416-3407

Enumeration date Apr 6, 2026

Last updated in NPPES Apr 6, 2026

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License STUDENT (CA) Primary

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 specialty is Charles Chan?

Charles Chan is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

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Emily Oberlies Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1518753698 Lidia Cardelle Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1629864467 Anjali Patel Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1467248930 Nickolas Okawa Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1922896224 Ethan Bailey Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1861281123 Erika Myint Family Medicine Physician · Pleasanton, CA NPI 1063354983 Simran Gidwani Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1942143771 Cathy Tran Student in an Organized Health Care Education/Training Program · Pleasanton, CA NPI 1275477036

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-06.