Timothy Chen, M.D
NPI 1821617259ActiveIndividual· Ophthalmology· Orange, CA
Ophthalmology (M.D) in Orange, California, trained at Columbia University College of Physicians and Surgeons (class of 2020). Their prescriptions cost Medicare Part D more than their services did: $15,539 for 156 claims, against $6,776 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $457.02 in all, mostly food and beverage.
Overview
| NPI | 1821617259 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Apr 15, 2020 |
| Last updated in NPPES | May 13, 2024 |
| Certified by provider | May 13, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 194317 | CA |
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 (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 45 |
|---|---|
| Services billed | 99 across 23 procedure codes |
| Paid by Medicare | $6,776 |
Part D prescriptions in 2024
| Prescriptions (claims) | 156 · 231 30-day fills |
|---|---|
| Patients | 82 |
| Total drug cost | $15,539 |
| Generic share | 58% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Ophthalmology |
Medical group
- Regents of the University of CaliforniaOrange, CA · 54 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$457.02 · 8 payments from 4 companies
- 2024$2,299 · 13 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $204.82 | 2 |
| Bausch & Lomb Americas Inc. | $120.12 | 1 |
| Regeneron Healthcare Solutions, Inc. | $68.11 | 3 |
| Apellis Pharmaceuticals, Inc. | $63.97 | 2 |
What the 2025 payments were for
- Food and Beverage$457.02 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 51 ophthalmologists in Orange · All ophthalmologists in California