Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Diamond Valley Optometry

Optometrist in Dublin, CA · enumerated 2024 · authorized official Winson Ong, Ceo.

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

National Provider Identifier

1285473611

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Registry record

Entity type Organization (Type 2)

Legal business name Diamond Valley Optometry

Practice address 6500 Dublin Blvd Ste F, Dublin, CA, 94568

Phone (925) 828-7730

Enumeration date May 24, 2024

Last updated in NPPES May 24, 2024

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers Primary

Authorized official

Name Winson Ong

Title Ceo

Phone (408) 757-6951

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2024-05-24. Verify at npiregistry.cms.hhs.gov.

Where is Diamond Valley Optometry located?

The practice location on file with NPPES is in Dublin, CA.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-24.