Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Chea-Yo Chang, O.D.

Optometrist in Modesto, CA · enumerated 2007.

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

National Provider Identifier

1811192289

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Registry record

Entity type Individual (Type 1)

Name Chea-Yo Chang

Credential O.D.

Sex Female

Practice address 4601 Dale Rd, 3rd Floor, Room 3a9 (Eye Care Services), Modesto, CA, 95356

Phone (209) 735-3133

Fax (209) 735-3155

Enumeration date Jun 18, 2007

Last updated in NPPES Jan 3, 2022

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License ODP 100-111 (ID) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License OPT 13626 (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

Is NPI 1811192289 active?

Yes, as of the latest NPPES snapshot, NPI 1811192289 is active (record last updated 2022-01-03).

How do I verify Chea-Yo Chang's NPI record?

Cross-check NPI 1811192289 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Daniel Lundgren Optometrist · Modesto, CA NPI 1811986375 Stephen Willey Physical Therapist · Modesto, CA NPI 1912998311 Dat Nguyen Specialist · Modesto, CA NPI 1659346435 Angela Abe Optometrist · Modesto, CA NPI 1336108885 Liansong Chen Specialist · Modesto, CA NPI 1265492292 Richard Garcia Emergency Medicine Physician · Modesto, CA NPI 1437110566 Laurel Goldstein Emergency Medicine Physician · Modesto, CA NPI 1992748446 Ajay Sood Diagnostic Radiology Physician · Modesto, CA NPI 1639113681

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-03.