Ernest Chang, OD
NPI 1235786898ActiveIndividual· Optometrist· Woodland, CA
Optometrist (OD) in Woodland, California, trained at Pacific University - College of Optometry (class of 2019). Mostly services rather than prescriptions: Medicare paid $28,821 for 322 patients in 2024, with only 36 Part D claims. Bausch & Lomb Americas Inc. was the largest of 3 companies reporting payments in 2025, $366.69 in all, mostly food and beverage.
Overview
| NPI | 1235786898 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | OD |
| Sole proprietor | No |
| NPI issued | Aug 19, 2019 |
| Last updated in NPPES | Aug 23, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 34341 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Optometry (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 322 |
|---|---|
| Services billed | 459 across 19 procedure codes |
| Paid by Medicare | $28,821 |
Part D prescriptions in 2024
| Prescriptions (claims) | 36 · 47 30-day fills |
|---|---|
| Patients | 22 |
| Total drug cost | $14,292 |
| Generic share | 53% of claims |
Education and affiliations
| Medical school | Pacific University - College of Optometry |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Optometry |
Medical group
- Regents of the University of CaliforniaSacramento, CA · 567 clinicians
Hospital affiliation
- University of California Davis Medical CenterSacramento, CA
Industry payments (Open Payments)
- 2025$366.69 · 3 payments from 3 companies
- 2024$444.57 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bausch & Lomb Americas Inc. | $124.43 | 1 |
| Johnson & Johnson Vision Care, Inc. | $122.31 | 1 |
| Dompe US, Inc. | $119.95 | 1 |
What the 2025 payments were for
- Food and Beverage$366.69 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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