Brian Chon, MD
NPI 1679990626ActiveIndividual· Ophthalmology· Walnut Creek, CA
Ophthalmology (MD) in Walnut Creek, California, trained at Duke University School of Medicine (class of 2014). 17 Medicare patients in 2024, $4,641 paid; nearly all of their 139 Part D prescriptions were generic (98%). Ani Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $83.28 in all, mostly food and beverage.
Overview
| NPI | 1679990626 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 27, 2014 |
| Last updated in NPPES | Apr 20, 2024 |
| Certified by provider | Apr 20, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | C194049 | CA |
| Ophthalmology, Ophthalmic Plastic and Reconstructive Surgery | 207WX0200X | C194049 | 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 - Ophthalmology (CA); Practitioner - Ophthalmology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 17 |
|---|---|
| Services billed | 526 across 17 procedure codes |
| Paid by Medicare | $4,641 |
Part D prescriptions in 2024
| Prescriptions (claims) | 139 · 143 30-day fills |
|---|---|
| Patients | 93 |
| Total drug cost | $2,167 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | Duke University School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Ophthalmology |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
- 2025$83.28 · 2 payments from 2 companies
- 2024$52.25 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ani Pharmaceuticals, Inc. | $50.47 | 1 |
| Astellas Pharma Global Development | $32.81 | 1 |
What the 2025 payments were for
- Food and Beverage$83.28 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 ophthalmologists in Walnut Creek · All ophthalmologists in California