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

Vivian Chau, OD

Q: What is the NPI number for Vivian Chau?

The National Provider Identifier (NPI) for Vivian Chau is 1558052951, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in Rosemead, CA · enumerated 2023.

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

National Provider Identifier

1558052951

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Registry record

Entity type Individual (Type 1)

Name Vivian Chau

Credential OD

Sex Female

Practice address Rosemead, CA, 91770

Phone (626) 757-3129

Enumeration date May 16, 2023

Last updated in NPPES Aug 15, 2023

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 35427 (CA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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

Where does Vivian Chau practice?

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

What is the NPI number for Vivian Chau?

The National Provider Identifier (NPI) for Vivian Chau is 1558052951, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-15.