Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Tiffany W. Chang, OD

Optometrist in Cupertino, CA · enumerated 2006.

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

National Provider Identifier

1336176080

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Registry record

Entity type Individual (Type 1)

Name Dr. Tiffany W. Chang

Credential OD

Sex Female

Practice address 10430 S De Anza Blvd, Suite 100, Cupertino, CA, 95014

Phone (408) 865-0440

Fax (408) 865-0411

Enumeration date Jun 27, 2006

Last updated in NPPES Apr 5, 2011

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 4549 (MA) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License TPL 13471 (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
CK662Z	Other	CA	PTAN

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 Tiffany Chang?

Tiffany Chang 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-05.