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

Dr. Grace Tran Chi, O.D.

Q: What is the NPI number for Grace Chi?

The National Provider Identifier (NPI) for Grace Chi is 1366607558, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in Pasadena, CA · enumerated 2008 · practices at Diamond Vision Optometry Associates and Gtc Optometry.

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

National Provider Identifier

1366607558

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Registry record

Entity type Individual (Type 1)

Name Dr. Grace Tran Chi

Credential O.D.

Sex Female

Practice address Pasadena, CA, 91101

Phone (626) 683-6968

Enumeration date Jul 28, 2008

Last updated in NPPES Jan 8, 2020

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 3347AT (OR) Secondary

152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License TUV007297 (NY) Secondary

152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License OPT13877PLG (CA) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License OPT13877PLG (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

What is the NPI number for Grace Chi?

The National Provider Identifier (NPI) for Grace Chi is 1366607558, a Type 1 (individual) record in the CMS NPPES registry.

Where does Grace Chi practice?

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

Other providers at this practice address

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Diamond Vision Optometry Associates and Gtc Optometry Low Vision Rehabilitation Optometrist · Pasadena, CA NPI 1336789296

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-08.