Eugene Y. Chang, MD
NPI 1265432991ActiveIndividual· Ophthalmology, Retina Specialist· Buena Park, CA
Ophthalmology, Retina Specialist (MD) in Buena Park, California, trained at Tufts University School of Medicine (class of 2000). Part D covered 4,014 prescriptions written in 2024, 68% of them generic. Intuitive Surgical, Inc. was the largest of 11 companies reporting payments in 2025, $2,286 in all, mostly food and beverage.
Overview
| NPI | 1265432991 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 22, 2005 |
| Last updated in NPPES | May 29, 2026 |
| Certified by provider | May 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology, Retina Specialist Primary | 207WX0107X | A77825 | CA |
| Ophthalmology | 207W00000X | 036111048 | IL |
| Ophthalmology | 207W00000X | MD183525 | OR |
| Ophthalmology, Retina Specialist | 207WX0107X | MD183525 | OR |
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 (OR) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 4,014 · 7,494 30-day fills |
|---|---|
| Patients | 874 |
| Total drug cost | $292,436 |
| Generic share | 68% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Ophthalmology |
Medical groups
- Azul Vision IncWest Hills, CA · 48 clinicians
- California Eye Specialists Medical Group IncGlendora, CA · 23 clinicians
- Eyecare Medical CorporationBuena Park, CA · 6 clinicians
- Bethel Eye Center Medical CorporationLos Angeles, CA · 5 clinicians
Industry payments (Open Payments)
- 2025$2,286 · 30 payments from 11 companies
- 2024$1,243 · 21 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $896.11 | 3 |
| Alcon Vision LLC | $254.87 | 3 |
| Astellas Pharma US Inc | $225.43 | 8 |
| Ani Pharmaceuticals, Inc. | $185.15 | 4 |
| Tarsus Pharmaceuticals, Inc. | $153.33 | 3 |
What the 2025 payments were for
- Food and Beverage$1,390 · 27 payments
- Travel and Lodging$896.11 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records