Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Zareh Simonian, O.D.

Optometrist in Pasadena, CA · enumerated 2009 · practices at James Kao Ophthalmology Corp.

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

National Provider Identifier

1285872309

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Registry record

Entity type Individual (Type 1)

Name Zareh Simonian

Credential O.D.

Sex Male

Practice address 790 E Colorado Blvd Ste 100, Pasadena, CA, 91101

Phone (626) 204-6100

Fax (626) 204-6110

Enumeration date Jan 27, 2009

Last updated in NPPES Jan 27, 2009

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 12490T (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 Zareh Simonian practice?

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

What is the NPI number for Zareh Simonian?

The National Provider Identifier (NPI) for Zareh Simonian is 1285872309, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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James Kao Ophthalmology Corp Ophthalmology Physician · Pasadena, CA NPI 1689832636

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-27.