William Chang, OD
NPI 1629206834ActiveIndividual· Optometrist· San Gabriel, CA
Optometrist (OD) in San Gabriel, California, licensed in CA, with an NPI issued in June 2009. Part D covered 29 prescriptions written in 2024, 59% of them generic. Alcon Vision LLC was the largest of 3 companies reporting payments in 2025, $2,165 in all, mostly food and beverage.
Overview
| NPI | 1629206834 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | OD |
| Sole proprietor | No |
| NPI issued | Jun 25, 2009 |
| Last updated in NPPES | Sep 16, 2021 |
| Certified by provider | Sep 16, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | TLG13713 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Optometry (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 29 · 57 30-day fills |
|---|---|
| Total drug cost | $11,790 |
| Generic share | 59% of claims |
Industry payments (Open Payments)
- 2025$2,165 · 18 payments from 3 companies
- 2024$226.90 · 11 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $1,517 | 6 |
| Johnson & Johnson Vision Care, Inc. | $525.54 | 11 |
| Bausch & Lomb Americas Inc. | $121.58 | 1 |
What the 2025 payments were for
- Food and Beverage$1,128 · 15 payments
- Travel and Lodging$1,037 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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