Emily Chang
NPI 1003311820ActiveIndividual· Ophthalmology· Oakland, CA
Ophthalmology in Oakland, California, trained at Baylor College of Medicine (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $57,775 for 1,040 claims, against $6,143 paid for services in 2024. Alcon Vision LLC reported $399.88 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1003311820 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | Yes |
| NPI issued | Mar 25, 2018 |
| Last updated in NPPES | Sep 29, 2022 |
| Certified by provider | Sep 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A178363 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 27 |
|---|---|
| Services billed | 46 across 9 procedure codes |
| Paid by Medicare | $6,143 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,040 · 2,302 30-day fills |
|---|---|
| Patients | 536 |
| Total drug cost | $57,775 |
| Generic share | 58% of claims |
Education and affiliations
| Medical school | Baylor College of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Ophthalmology |
| Telehealth | Offers telehealth |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
- 2025$399.88 · 3 payments from 1 company
- 2024$410.64 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $399.88 | 3 |
What the 2025 payments were for
- Food and Beverage$399.88 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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