ERNEST CHANG OD
NPI 1235786898
Optometrist in Woodland, CA
About Ernest Chang Od NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ERNEST CHANG OD (NPI 1235786898) is an individual optometrist in Woodland, California, licensed in California (34341) and active in the NPI registry since August 2019. He is enrolled in Medicare PECOS and is a graduate of Pacific University - College Of Optometry (2019).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ernest Chang Od is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Ernest Chang reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Woodland, CA 95776
- Reassigned Medicare billing, California enrollment
- 4 clinicians in this Medicare group
Davis, CA 95616
- Reassigned Medicare billing, California enrollment
- 918 clinicians in this Medicare group
Yuba City, CA 95993
- Reassigned Medicare billing, California enrollment
- 3 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95776 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 Ernest Chang's NPI number?
The NPI number for Ernest Chang is 1235786898. It was assigned to this individual provider in the NPPES registry on August 19, 2019.
Where is Ernest Chang located?
Ernest Chang practices at 421 Pioneer Ave, Woodland, CA 95776. The listed phone number is (530) 661-0300.
What is Ernest Chang's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Ernest Chang enrolled in Medicare?
Yes. Ernest Chang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Ernest Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ernest Chang reassigns Medicare benefits to 3 organizations: Eyes Of Woodland Optometry, Apc (Woodland, CA), Regents Of The University Of California (Davis, CA) and (Yuba City, CA). Each 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 Ernest Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ernest Chang accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Providence Health Plan list Ernest 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 Ernest Chang was last updated on August 23, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Ernest Chang, OD · NPI 1235786898
Optometrist provider in Woodland, California. Individual provider, active in the CMS NPPES registry since August 19, 2019.
## Identity
- **NPI:** 1235786898 (Entity type: Individual)
- **Enumerated:** August 19, 2019
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** 34341 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 421 PIONEER AVE, Woodland, CA 95776-4948
- **Phone:** (530) 661-0300
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Eyes Of Woodland Optometry, Apc (NPI 1043349822, Woodland, CA); Regents Of The University Of California (NPI 1912987553, Davis, CA); (NPI 1578577102, Yuba City, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Pacific University - College Of Optometry, class of 2019
## Record status
- **NPPES last updated:** August 23, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1235786898) · Data from the CMS NPPES public registry.