Oscar Chen, MD, MS
NPI 1598329989ActiveIndividual· Ophthalmology· Lexington, MA
Ophthalmology (MD, MS) in Lexington, Massachusetts, trained at Rush Medical College of Rush University (class of 2021). Part D covered 738 prescriptions written in 2024, 59% of them generic. Glaukos Corporation was the largest of 9 companies reporting payments in 2025, $1,275 in all, mostly food and beverage.
Overview
| NPI | 1598329989 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, MS |
| Sole proprietor | No |
| NPI issued | May 1, 2019 |
| Last updated in NPPES | Oct 23, 2026 |
| Certified by provider | Oct 23, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 1025773 | MA |
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 (MA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 738 · 1,215 30-day fills |
|---|---|
| Patients | 217 |
| Total drug cost | $40,268 |
| Generic share | 59% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 2021 |
| Medicare specialty | Ophthalmology |
Medical groups
- Regents of the University of CaliforniaOrange, CA · 54 clinicians
- Lexington Eye Associates, IncLexington, MA · 34 clinicians
- Lexington Eye Associates - BidLexington, MA · 34 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$1,275 · 16 payments from 9 companies
- 2024$966.75 · 15 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaukos Corporation | $397.15 | 3 |
| Alcon Vision LLC | $269.84 | 5 |
| Abbvie Inc. | $174.27 | 2 |
| Biotissue Holdings Inc. | $134.42 | 1 |
| Astrazeneca Pharmaceuticals LP | $121.83 | 1 |
What the 2025 payments were for
- Food and Beverage$1,275 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 ophthalmologists in Lexington · All ophthalmologists in Massachusetts