Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Chi Chien Catherine Yau, DO

Sports Medicine (Family Medicine) Physician in Oakland, CA · enumerated 2018.

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

National Provider Identifier

1447756317

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Registry record

Entity type Individual (Type 1)

Name Chi Chien Catherine Yau

Credential DO

Sex Female

Practice address 3600 Broadway, Oakland, CA, 94611

Phone (510) 362-4243

Enumeration date Apr 1, 2018

Last updated in NPPES Feb 27, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207QS0010X Sports Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 20A18922 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

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.

What specialty is Chi Chien Yau?

Chi Chien Yau is registered in NPPES with the primary taxonomy of Sports Medicine (Family Medicine) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-27.