Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nathan Quin Leung, OD

Optometrist in San Dimas, CA · enumerated 2025.

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

National Provider Identifier

1801784491

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Registry record

Entity type Individual (Type 1)

Name Nathan Quin Leung

Credential OD

Sex Male

Practice address 520 N Lone Hill Ave, San Dimas, CA, 91773

Phone (909) 394-4545

Enumeration date Jun 24, 2025

Last updated in NPPES Jun 24, 2025

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 35958 (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.

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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 Nathan Leung?

Nathan Leung is registered in NPPES with the primary taxonomy of Optometrist. 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 2025-06-24.