DR. GWENDOLYN YEE CHANG OD
NPI 1861114183
Optometrist in Hacienda Heights, CA
About Dr. Gwendolyn Yee Chang Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GWENDOLYN YEE CHANG OD (NPI 1861114183) is an individual optometrist in Hacienda Heights, California, licensed in California (OPT35282-TLG) and active in the NPI registry since September 2022. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Gwendolyn Yee Chang Od is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Gwendolyn Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90026
- Reassigned Medicare billing, California enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91745 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gwendolyn Chang's NPI number?
The NPI number for Gwendolyn Chang is 1861114183. It was assigned to this individual provider in the NPPES registry on September 13, 2022.
Where is Gwendolyn Chang located?
Gwendolyn Chang practices at 16388 Colima Rd Ste 101, Hacienda Heights, CA 91745. The listed phone number is (626) 854-1131.
What is Gwendolyn Chang's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Gwendolyn Chang enrolled in Medicare?
Yes. Gwendolyn Chang is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Gwendolyn Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gwendolyn Chang reassigns Medicare benefits to Doctor Gwendolyn Yee Chang Optometry, A Professional Corporation (Los Angeles, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gwendolyn Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gwendolyn Chang accept?
Health plans from Providence Health Plan list Gwendolyn Chang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gwendolyn Chang was last updated on September 15, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Gwendolyn Yee Chang, OD · NPI 1861114183
Optometrist provider in Hacienda Heights, California. Individual provider, active in the CMS NPPES registry since September 13, 2022.
## Identity
- **NPI:** 1861114183 (Entity type: Individual)
- **Enumerated:** September 13, 2022
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** OPT35282-TLG (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 16388 COLIMA RD STE 101, Hacienda Heights, CA 91745-5523
- **Phone:** (626) 854-1131
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Doctor Gwendolyn Yee Chang Optometry, A Professional Corporation (NPI 1396460531, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 15, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1861114183) · Data from the CMS NPPES public registry.