Blake Isernhagen, MD
Retina Specialist · Lexington, KYNPI 1336469444
Payments from drug & device makers
Across 356 payments — averaging $514.56 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech USA, Inc.$103K
- Novartis$36K
- AbbVie$31K
- Carl Zeiss Meditec, Inc.$4K
- Cardinal Health 108 LLC$3K
- Optos, Inc.$1K
- plus $5K from 15 others
What the payments were for
- Consulting fees$32,27518%
- Speaking & faculty fees$115,37863%
- Travel & lodging$23,34313%
- Food & beverage$12,1877%
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. | 118 | $103,355 |
| Novartis | 39 | $36,285 |
| AbbVie(2 entities) | 53 | $31,031 |
| Carl Zeiss Meditec, Inc. | 1 | $4,000 |
| Cardinal Health 108 LLC | 6 | $2,744 |
| Optos, Inc. | 7 | $1,086 |
| Regeneron Healthcare Solutions, Inc. | 32 | $778 |
| Alimera Sciences, Inc. | 21 | $698 |
| Notal Vision, Inc. | 1 | $618 |
| Alcon | 6 | $606 |
| Apellis Pharmaceuticals, Inc. | 16 | $461 |
| Astellas Pharma US Inc | 16 | $344 |
| ANI Pharmaceuticals, Inc. | 8 | $333 |
| Eyepoint US, Inc. | 12 | $285 |
| Bausch & Lomb Americas Inc. | 6 | $187 |
| Genentech, Inc. | 3 | $137 |
| Biogen | 5 | $111 |
| Mallinckrodt Hospital Products Inc. | 2 | $55 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 2 | $31 |
| Mallinckrodt Enterprises LLC | 1 | $22 |
| Coherus Oncology, Inc. | 1 | $17 |
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.
- VABYSMO$86,247
- OZURDEX$24,209
- Lucentis$15,855
- Clarus 700$4,000
- BEOVU$2,218
- PANORAMIC OPHTHALMOSCOPE$1,662
- OCT OPHTHALMOSCOPE$831
- NFC-700$831
- YUTIQ$351
- Iluvien$350
- Constellation$265
- NGENUITY$148
- Unity$148
- PURIFIED CORTROPHIN GEL$138
- XIPERE$111
How this compares
$183,183 in reported general payments places this provider in the 90th percentile of 22 retina specialist providers in Kentucky.
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 |
|---|---|---|
| Difluprednate | 149 | $15,891 |
| CombiganBrimonidine Tartrate/Timolol | 26 | $9,825 |
| Atovaquone | 18 | $9,646 |
| Prednisolone Acetate | 158 | $6,953 |
| ValacyclovirValacyclovir Hcl | 93 | $4,539 |
| Brimonidine Tartrate | 76 | $2,603 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 145 | $2,148 |
| Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol | 20 | $1,476 |
| Timolol Maleate | 75 | $797 |
| Atropine Sulfate | 15 | $739 |
| ErythromycinErythromycin Base | 52 | $463 |
| Latanoprost | 99 | $451 |
| Dorzolamide Hcl | 38 | $385 |
| Prednisone | 32 | $189 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 12 | $43 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieCombigan | $31,031 | $9,82526 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 90th percentile of 22 retina specialist providers in Kentucky.
Other retina specialist in Lexington
- John KitchensLexington$2.9M
- Miguel BusquetsLexington$274K
- Ricky IsernhagenLexington$147K
- Leanne ClevengerLexington$27K
- William WoodLexington$23K
- Romulo AlbuquerqueLexington$20K
- Todd PurkissLexington$11K
- Belinda ShirkeyLexington$11K
- Aaron RiccaLexington$5K
- Osama SabbaghLexington$4K
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.