Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Retina Institute of California Medical Group, A California Medical Par

Ophthalmology Physician in Riverside, CA · enumerated 2015 · authorized official Tom Chang, Founder.

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

National Provider Identifier

1770976987

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Registry record

Entity type Organization (Type 2)

Legal business name Retina Institute of California Medical Group, A California Medical Par

Practice address 6906 Brockton Ave, Ste. 6, Riverside, CA, 92506

Phone (951) 784-8373

Fax (951) 784-8377

Enumeration date Mar 12, 2015

Last updated in NPPES Oct 8, 2021

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License A69909 (CA) Secondary

174400000X Specialist Other Service Providers · License A69909 (CA) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Tom Chang

Title Founder

Phone (626) 568-8838

Other identifiers

Identifier	Type	State	Issuer
1760541569	Other	CA	GROUP NPI

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

Who is the authorized official for Retina Institute of California Medical Group, A California Medical Par?

NPPES lists Tom Chang (Founder) as the authorized official for this organization.

What is the NPI number for Retina Institute of California Medical Group, A California Medical Par?

The NPI for Retina Institute of California Medical Group, A California Medical Par is 1770976987, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-08.