Sylvia Lou Chang
NPI 1053843458ActiveIndividual· Ophthalmology· Rancho Cucamonga, CA
Ophthalmology in Rancho Cucamonga, California, trained at Wright State University Boonshoft School of Medicine (class of 2017). Their prescriptions cost Medicare Part D more than their services did: $270,343 for 4,398 claims, against $14,756 paid for services in 2024. Bausch & Lomb Americas Inc. was the largest of 10 companies reporting payments in 2025, $950.38 in all, mostly food and beverage.
Overview
| NPI | 1053843458 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Apr 3, 2017 |
| Last updated in NPPES | Jun 13, 2024 |
| Certified by provider | Jun 13, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A187821 | CA |
| Ophthalmology | 207W00000X | 21409 | NV |
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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 76 |
|---|---|
| Services billed | 161 across 17 procedure codes |
| Paid by Medicare | $14,756 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,398 · 6,328 30-day fills |
|---|---|
| Patients | 1,115 |
| Total drug cost | $270,343 |
| Generic share | 62% of claims |
Education and affiliations
| Medical school | Wright State University Boonshoft School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Ophthalmology |
Medical groups
- Azul Vision IncWest Hills, CA · 48 clinicians
- California Eye Specialists Medical Group IncGlendora, CA · 23 clinicians
Industry payments (Open Payments)
- 2025$950.38 · 30 payments from 10 companies
- 2024$843.64 · 21 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bausch & Lomb Americas Inc. | $256.32 | 3 |
| Sight Sciences, Inc. | $203.82 | 5 |
| Amgen Inc. | $156.17 | 9 |
| Alcon Vision LLC | $84.85 | 4 |
| Oyster Point Pharma, Inc. | $57.42 | 2 |
What the 2025 payments were for
- Food and Beverage$950.38 · 30 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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