Zachary Koretz, MD
Retina Specialist · Aurora, CONPI 1487157269
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (44.5%), food and beverage and speaking fees — rather than concentrated in one kind of arrangement. 18 manufacturers reported payments, led by Genentech USA, Inc. at 43.6% of the total. Reporting peaked in 2023 at $9,015 and has fallen 82.0% since, to $1,626 in 2025.
Across 91 payments — averaging $149.00 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech USA, Inc.$6K
- Alimera Sciences, Inc.$3K
- Regeneron$1K
- Astellas Pharma US Inc$686
- AbbVie$647
- Apellis Pharmaceuticals, Inc.$400
- plus $1K from 12 others
What the payments were for
- Consulting fees$6,03545%
- Speaking & faculty fees$2,34017%
- Travel & lodging$2882%
- Food & beverage$4,65534%
- Education$1001%
- Entertainment$1411%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Genentech USA, Inc. | 17 | $5,912 |
| Alimera Sciences, Inc. | 11 | $3,237 |
| Regeneron | 2 | $1,220 |
| Astellas Pharma US Inc | 10 | $686 |
| AbbVie(2 entities) | 12 | $647 |
| Apellis Pharmaceuticals, Inc. | 4 | $400 |
| Mallinckrodt Hospital Products Inc. | 8 | $320 |
| Genentech, Inc. | 2 | $224 |
| Harrow Eye, LLC | 9 | $152 |
| Regeneron Healthcare Solutions, Inc. | 1 | $144 |
| Optos, Inc. | 2 | $141 |
| Alcon | 2 | $134 |
| Glaukos Corporation | 1 | $109 |
| Neurotech Pharmaceuticals, Inc. | 3 | $81 |
| ANI Pharmaceuticals, Inc. | 4 | $74 |
| Immunocore Limited | 1 | $32 |
| Bausch & Lomb Americas Inc. | 1 | $24 |
| Sight Sciences, Inc. | 1 | $23 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$13,559 in reported general payments places this provider in the 75th percentile of 51 retina specialist providers in Colorado.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Prednisolone Acetate | 29 | $1,174 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 22 | $241 |
| Latanoprost | 23 | $188 |
| ErythromycinErythromycin Base | 15 | $157 |
| Brimonidine Tartrate | 12 | $117 |
Paid to pharmacies, not to this prescriber.
Other retina specialist in Aurora
- Talisa ForestAurora$84K
- Lynn HassmanAurora$16K
- Ross ChodAurora$10K
- Niranjan ManoharanAurora$9K
- Amit ReddyAurora$4K
- Rachel ChenAurora$4K
- Naresh MandavaAurora$3K
- Frank SiringoAurora$3K
- Abraham HangAurora$2K
- Sean RodriguezAurora$1K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.