Ophthalmology, Retina Specialist · Buena Park, CA
NPI
1265432991
Since 2005
Specialty
Ophthalmology, Retina Specialist
Code 207WX0107X
Group practices
6
Medicare group memberships
Hospitals
0
Hospital affiliations
5832 Beach Blvd Unit 109
Buena Park, CA, 90621
Phone (714) 228-1888
Groups this clinician bills Medicare through
Medicare paid
-
No Medicare services published
Medicare patients
-
Drug cost, 2024
$292K
4,014 prescriptions
Company payments, 2025
$12K
From 11 companies
Medicare prescription drug claims, 2024
In 2024, the drug Eugene Y Chang prescribed most often to Medicare patients was Latanoprost, with 1,054 prescriptions and refills. In total Eugene Y Chang wrote 4,014 Medicare prescriptions that cost $292K.
| Drug |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-05-29.
| Claims |
|---|
| 30-day fills |
|---|
| Patients |
|---|
| Cost |
|---|
| Latanoprost Generic | 1,054 | 2,124 | 345 | $12K |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 958 | 2,011 | 326 | $20K |
| Brimonidine Tartrate Generic | 463 | 888 | 147 | $13K |
| Prednisolone Acetate Generic | 325 | 584 | 161 | $14K |
| Timolol Maleate Generic | 184 | 370 | 66 | $1,937 |
| Dorzolamide Hcl Generic | 161 | 310 | 69 | $4,079 |
| Erythromycin Erythromycin Base | 102 | 102 | 64 | $1,706 |
| Ketorolac Tromethamine Generic | 89 | 114 | 39 | $2,056 |
| Rhopressa Netarsudil Mesylate | 60 | 78 | 13 | $23K |
| Alphagan P Brimonidine Tartrate | 57 | 88 | 18 | $23K |
| Prolensa Bromfenac Sodium | 53 | 65 | 19 | $18K |
| Bromsite Bromfenac Sodium | 52 | 59 | 21 | $14K |
| Lumigan Bimatoprost | 40 | 95 | 16 | $23K |
| Cyclosporine Generic | 39 | 62 | 16 | $21K |
| Restasis Cyclosporine | 38 | 54 | 17 | $32K |
Brand drugs: - claims; generic drugs: 2,727 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Eugene Y Chang $12K ($2,286 in general payments such as food, travel and fees and $9,600 for research) from 11 companies. The largest payer was Ocular Therapeutix, Inc. with $9,725.
| Company | Payments | Amount |
|---|---|---|
| Ocular Therapeutix, Inc. OCUL | 3 | $9,725 |
| Intuitive Surgical, Inc. ISRG | 3 | $896 |
| Alcon Vision LLC ALC | 3 | $255 |
| Astellas Pharma US Inc 4503.T | 8 | $225 |
| ANI Pharmaceuticals, Inc. ANIP | 4 | $185 |
| Tarsus Pharmaceuticals, Inc. TARS | 3 | $153 |
| Bausch & Lomb Americas Inc. BLCO | 2 | $146 |
| Abbvie Inc. ABBV | 1 | $125 |
| Johnson & Johnson Surgical Vision, Inc. JNJ | 2 | $113 |
| Glaukos Corporation GKOS | 1 | $44.56 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.