Winson Ong, O.D.
NPI 1821132143ActiveIndividual· Optometrist· Brentwood, CA
Optometrist (O.D.) in Brentwood, California, trained at University of California - School of Optometry (class of 2002). In 2024 Medicare paid $16,614 for 82 patients, and Part D covered 118 of their prescriptions, 36% of them generic. Coopervision Inc. was the largest of 5 companies reporting payments in 2025, $1,340 in all, mostly food and beverage.
Overview
| NPI | 1821132143 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Feb 19, 2007 |
| Last updated in NPPES | Jul 28, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 11938T | 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 | 82 |
|---|---|
| Services billed | 199 across 16 procedure codes |
| Paid by Medicare | $16,614 |
Part D prescriptions in 2024
| Prescriptions (claims) | 118 · 211 30-day fills |
|---|---|
| Patients | 36 |
| Total drug cost | $20,461 |
| Generic share | 36% of claims |
Education and affiliations
| Medical school | University of California - School of Optometry |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Optometry |
Medical groups
- Balfour Vision Optix Optometry IncBrentwood, CA · 3 clinicians
- Winson Ong OdAntioch, CA · 3 clinicians
Industry payments (Open Payments)
- 2025$1,340 · 18 payments from 5 companies
- 2024$643.58 · 8 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Coopervision Inc. | $501.07 | 9 |
| Alcon Vision LLC | $426.67 | 5 |
| Optos, Inc. | $241.58 | 1 |
| Bausch & Lomb Americas Inc. | $121.90 | 1 |
| Johnson & Johnson Vision Care, Inc. | $48.79 | 2 |
What the 2025 payments were for
- Food and Beverage$1,098 · 17 payments
- Entertainment$241.58 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 21 optometrists in Brentwood · All optometrists in California