Adam Gerstenblith, MD
Retina Specialist · Hagerstown, MDNPI 1265654875
Payments from drug & device makers
Across 2,653 payments — averaging $3243.97 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Regeneron$3.6M
- Ocular Therapeutix, Inc.$931K
- Apellis Pharmaceuticals, Inc.$894K
- Eyepoint US, Inc.$889K
- Bayer$888K
- Boehringer Ingelheim$519K
- plus $841K from 10 others
Across 1 payment — averaging $1631.82 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Regeneron$2K
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 |
|---|---|---|
| Regeneron | 1,662 | $3,645,316 |
| Ocular Therapeutix, Inc. | 72 | $930,607 |
| Apellis Pharmaceuticals, Inc. | 153 | $894,092 |
| Eyepoint US, Inc. | 4 | $888,597 |
| Bayer | 473 | $888,383 |
| Boehringer Ingelheim | 28 | $518,568 |
| Novartis | 5 | $407,817 |
| Kyowa Kirin, Inc. | 100 | $266,025 |
| Regeneron Healthcare Solutions, Inc. | 53 | $78,660 |
| AbbVie(2 entities) | 39 | $45,097 |
| Hexal AG | 3 | $32,142 |
| Boehringer Ingelheim International GmbH | 42 | $5,467 |
| US Retina LLC | 12 | $5,202 |
| Genentech USA, Inc. | 4 | $214 |
| Bausch & Lomb Americas Inc. | 2 | $35 |
| ANI Pharmaceuticals, Inc. | 1 | $32 |
How this compares
$8,606,254 in reported general payments places this provider in the 95th percentile of 47 retina specialist providers in Maryland.
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.
Other retina specialist in Hagerstown
- Robert ParnesHagerstown$7K
- Adam WenickHagerstown$5K
- Erwin PuenteHagerstown$4K
- Michael LaiChevy Chase$1.6M
- Brian DoChevy Chase$1.1M
- Gayatri ReillyChevy Chase$957K
- Michael ElmanBaltimore$304K
- Rohit LakhanpalOwings Mills$168K
- Aziz KhanifarSilver Spring$83K
- Joshua LevinsonGreenbelt$67K
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.