Sherif Isshak Ibrahim, MD
Nephrology · Winter Haven, FLNPI 1699897579
Payments from drug & device makers
Across 76 payments — averaging $25.94 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$317
- Bard Peripheral Vascular, Inc.$220
- Amgen$164
- Bayer$163
- Vifor Pharma, Inc.$121
- Daiichi Sankyo Inc.$115
- plus $872 from 15 others
What the payments were for
- Food & beverage$1,89096%
- Education$824%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| GSK | 11 | $317 |
| Bard Peripheral Vascular, Inc. | 2 | $220 |
| Amgen(2 entities) | 8 | $164 |
| Bayer | 3 | $163 |
| Vifor Pharma, Inc. | 6 | $121 |
| Daiichi Sankyo Inc. | 5 | $115 |
| Otsuka America Pharmaceutical, Inc. | 5 | $103 |
| Fresenius USA Marketing, Inc. | 4 | $86 |
| OPKO Pharmaceuticals, LLC | 4 | $85 |
| Ardelyx, Inc. | 4 | $85 |
| Calliditas Therapeutics US Inc. | 2 | $74 |
| Akebia Therapeutics Inc | 5 | $72 |
| AstraZeneca | 4 | $66 |
| Novartis | 2 | $55 |
| ANI Pharmaceuticals, Inc. | 2 | $47 |
| Mallinckrodt Hospital Products Inc. | 2 | $46 |
| Mallinckrodt Enterprises LLC | 2 | $45 |
| Aurinia Pharma U.S., Inc. | 2 | $39 |
| Siemens Medical Solutions USA, Inc. | 1 | $32 |
| Boehringer Ingelheim | 1 | $20 |
| Travere Therapeutics, 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.
- Kerendia$121
How this compares
$1,971 in reported general payments places this provider in the 50th percentile of 756 nephrology providers in Florida.
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 |
|---|---|---|
| Sevelamer Carbonate | 89 | $41,961 |
| VelphoroSucroferric Oxyhydroxide | 18 | $34,296 |
| VeltassaPatiromer Calcium Sorbitex | 27 | $32,524 |
| KerendiaFinerenone | 33 | $22,571 |
| LokelmaSodium Zirconium Cyclosilicate | 26 | $22,171 |
| FarxigaDapagliflozin Propanediol | 20 | $20,871 |
| EliquisApixaban | 21 | $14,747 |
| Olmesartan Medoxomil | 234 | $2,985 |
| Hydralazine Hcl | 191 | $2,365 |
| Calcium Acetate | 15 | $2,306 |
| Chlorthalidone | 172 | $1,566 |
| Bumetanide | 55 | $1,559 |
| Carvedilol | 176 | $1,273 |
| Potassium Chloride | 18 | $1,113 |
| Tacrolimus | 21 | $977 |
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 |
|---|---|---|
| AstraZenecaLokelma, Farxiga | $66 | $43,04146 claims |
| Fresenius USA Marketing, Inc.Velphoro | $86 | $34,29618 claims |
| BayerKerendia | $163 | $22,57133 claims |
| ANI Pharmaceuticals, Inc.Valsartan | $47 | $62118 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 50th percentile of 756 nephrology providers in Florida.
Other nephrology in Winter Haven
- Thomas MarburyOrlando$41.1M
- Julio VijilHollywood$16.1M
- Steven ZeigHollywood$14.3M
- Oscar GalvezMiami$14.2M
- Jesus NavarroTampa$13.3M
- Arvind MadanOrlando$9.7M
- David HalpertAtlantis$4.2M
- Wayne KotzkerFort Lauderdale$3.4M
- Edouard MartinLauderdale Lakes$2.7M
- Jorge PosadaCoral Gables$2.5M
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.