Diana Chao, MD
NPI 1528320298ActiveIndividual· Ophthalmology· San Gabriel, CA
Ophthalmology (MD) in San Gabriel, California, trained at University of California, San Diego School of Medicine (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $289,115 for 3,545 claims, against $65,537 paid for services in 2024. Sight Sciences, Inc. was the largest of 4 companies reporting payments in 2024, $352.91 in all, mostly food and beverage.
Overview
| NPI | 1528320298 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 8, 2012 |
| Last updated in NPPES | Jan 19, 2026 |
| Certified by provider | Jan 19, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A135726 | CA |
| Ophthalmology, Glaucoma Specialist | 207WX0009X | A135726 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 229 |
|---|---|
| Services billed | 814 across 20 procedure codes |
| Paid by Medicare | $65,537 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,545 · 5,984 30-day fills |
|---|---|
| Patients | 460 |
| Total drug cost | $289,115 |
| Generic share | 61% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Ophthalmology |
Industry payments (Open Payments)
- 2024$352.91 · 11 payments from 4 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Sight Sciences, Inc. | $159.02 | 2 |
| Abbvie Inc. | $137.76 | 7 |
| Alcon Vision LLC | $32.78 | 1 |
| Bausch & Lomb Americas Inc. | $23.35 | 1 |
What the 2024 payments were for
- Food and Beverage$352.91 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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