Katherine Grace Chen, MS
NPI 1699237420ActiveIndividual· Ophthalmology· Irvine, CA
Ophthalmology (MS) in Irvine, California, trained at University of California, Irvine, California College of Medicine (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $788,961 for 1,212 claims, against $30,032 paid for services in 2024. Biotissue Holdings Inc. was the largest of 11 companies reporting payments in 2025, $861.20 in all, mostly food and beverage.
Overview
| NPI | 1699237420 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MS |
| Sole proprietor | No |
| NPI issued | Apr 1, 2019 |
| Last updated in NPPES | May 8, 2023 |
| Certified by provider | May 6, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A184907 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | 125.076053 | IL |
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 | 193 |
|---|---|
| Services billed | 340 across 31 procedure codes |
| Paid by Medicare | $30,032 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,212 · 1,766 30-day fills |
|---|---|
| Patients | 354 |
| Total drug cost | $788,961 |
| Generic share | 43% of claims |
Education and affiliations
| Medical school | University of California, Irvine, California College of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Ophthalmology |
Medical group
- Eye Physicians of the East Bay Medical CorporationOakland, CA · 5 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$861.20 · 26 payments from 11 companies
- 2024$1,512 · 12 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biotissue Holdings Inc. | $188.60 | 5 |
| Alcon Vision LLC | $147.17 | 1 |
| Harrow Eye, LLC | $140.96 | 6 |
| Glaukos Corporation | $135.00 | 2 |
| Oyster Point Pharma, Inc. | $60.17 | 3 |
What the 2025 payments were for
- Food and Beverage$861.20 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other ophthalmologists in Irvine
- 1003101874
- 1164050993
- 1174548903
- 1215970892
- 1245650985
- 1295778819
- 1336536861
- 1346425964
- 1346501137
- 1356831929
- 1366458200
- 1497251367
All 48 ophthalmologists in Irvine · All ophthalmologists in California