Doctor profile · Federal record
Dr. Oscar Chen, MD, MS
Ophthalmology Physician (CMS: Ophthalmology) · Ophthalmology Physician · Orange, CA
- NPI 1598329989
- Accepts Medicare
- 5 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
101 the City Dr S
Orange, CA 928683201
(949) 824-7105 - Additional location
-
1725 W Harrison St Ste 906
Chicago, IL 606123848
(312) 942-5000 - Additional location
-
600 S Paulina St Ste 403
Chicago, IL 606123806
(312) 942-7100
Credentials & registration
- NPI registered
- May 2019 — 7 yrs on file
- Profile last updated
- June 4, 2025
- Year of graduation
- 2021 — 5 yrs since
- Specialty taxonomy
- 207W00000X — NUCC code
- State licenses (2)
- California #201127 · Illinois #125077452
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1598329989. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$967
Transactions
15
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Alcon Vision LLC | 4 | $506.01 | |
| Regeneron Pharmaceuticals, INC. | 1 | $131.65 | |
| Apellis Pharmaceuticals, INC. | 1 | $99.89 | |
| New World Medical,INC. | 2 | $51.77 | |
| Sight Sciences, INC. | 2 | $50.61 | |
| Glaukos Corporation | 2 | $42.40 | |
| Alimera Sciences, INC. | 1 | $37.85 | |
| Regeneron Healthcare Solutions, INC. | 1 | $25.94 | |
| Rayner Intraocular Lenses Limited | 1 | $20.63 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
504
Patients
195
Total drug cost
$26,911
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Latanoprost | Generic | 151 | 56 | $3,207 |
| Brimonidine Tartrate | Generic | 68 | 28 | $2,552 |
| Prednisolone Acetate | Generic | 68 | 39 | $2,402 |
| Dorzolamide Hcl | Generic | 48 | 21 | $1,040 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 45 | 21 | $973 |
| Timolol Maleate | Generic | 40 | 18 | $448 |
| Atropine Sulfate | Generic | 22 | 0 | $991 |
| Erythromycin (Erythromycin Base) | Brand | 15 | 0 | $207 |
| Moxifloxacin (Moxifloxacin Hcl) | Brand | 14 | 12 | $440 |
| Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) | Brand | 11 | 0 | $147 |
Frequently asked questions
What is Dr. Oscar Chen's medical specialty?
Dr. Oscar Chen practices Ophthalmology Physician in Orange, CA.
Where does Dr. Oscar Chen practice?
Dr. Oscar Chen practices at 101 the City Dr S, Orange, CA 928683201. Office phone: 9498247105.
What is Dr. Oscar Chen's NPI?
Dr. Oscar Chen's National Provider Identifier (NPI) is 1598329989, issued by NPPES.
Does Dr. Oscar Chen accept Medicare assignment?
Yes. Dr. Oscar Chen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.