Warren Kemper, MD
Internal Medicine · Louisville, KYNPI 1770595035
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 829 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 32 manufacturers, the largest accounting for just 15.7% — the pattern of someone who eats at a lot of different presentations. Among internal medicine clinicians in KY with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 829 payments — averaging $15.94 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$2K
- Amgen$1K
- Novo Nordisk$1K
- Pfizer$1K
- Boehringer Ingelheim$993
- Amarin Pharma, Inc.$599
- plus $6K from 26 others
What the payments were for
- Food & beverage$13,208100%
- Education$50%
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 |
|---|---|---|
| AstraZeneca(2 entities) | 83 | $2,073 |
| Amgen(2 entities) | 107 | $1,486 |
| Novo Nordisk | 96 | $1,408 |
| Pfizer | 78 | $1,132 |
| Boehringer Ingelheim | 71 | $993 |
| Amarin Pharma, Inc. | 41 | $599 |
| Sanofi-aventis U.S. LLC | 37 | $595 |
| Novartis | 32 | $567 |
| Lilly USA, LLC | 40 | $530 |
| GSK | 37 | $516 |
| Johnson & Johnson | 37 | $487 |
| AbbVie(2 entities) | 24 | $454 |
| Biohaven Pharmaceutical Holding Company Ltd. | 23 | $428 |
| Esperion Therapeutics, Inc. | 26 | $379 |
| Merck | 15 | $231 |
| Kowa Pharmaceuticals America, Inc. | 16 | $227 |
| Biohaven Pharmaceuticals, Inc. | 13 | $218 |
| Exact Sciences | 8 | $156 |
| Astellas Pharma US Inc | 7 | $108 |
| Phathom Pharmaceuticals, Inc. | 5 | $106 |
| Bayer | 6 | $97 |
| E.r. Squibb & Sons, L.L.C. | 5 | $79 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $69 |
| Sanofi Pasteur Inc. | 4 | $52 |
| Abbott | 3 | $46 |
| Axsome Therapeutics, Inc. | 2 | $42 |
| Mylan Specialty L.p. | 2 | $30 |
| Shire North American Group Inc | 2 | $25 |
| Si-bone, Inc. | 1 | $23 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $22 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 2 | $17 |
| Philips North America LLC | 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.
How this compares
$13,213 in reported general payments places this provider in the 95th percentile of 1,284 internal medicine 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 |
|---|---|---|
| FarxigaDapagliflozin Propanediol | 187 | $193,889 |
| JanuviaSitagliptin Phosphate | 150 | $166,229 |
| EliquisApixaban | 144 | $149,199 |
| JardianceEmpagliflozin | 78 | $87,250 |
| OzempicSemaglutide | 43 | $85,600 |
| RybelsusSemaglutide | 33 | $67,884 |
| XareltoRivaroxaban | 51 | $65,858 |
| Repatha SureclickEvolocumab | 43 | $48,518 |
| Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog | 32 | $35,182 |
| VascepaIcosapent Ethyl | 37 | $27,602 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 27 | $25,604 |
| MounjaroTirzepatide | 12 | $24,512 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 21 | $18,304 |
| NexlizetBempedoic Acid/Ezetimibe | 16 | $17,305 |
| EntrestoSacubitril/Valsartan | 13 | $16,731 |
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 |
|---|---|---|
| AstraZenecaFarxiga, Breztri Aerosphere, Symbicort | $2,073 | $224,974228 claims |
| MerckJanuvia | $231 | $166,229150 claims |
| Novo NordiskOzempic, Rybelsus | $1,408 | $153,48476 claims |
| PfizerEliquis, Premarin | $1,132 | $152,625158 claims |
| Boehringer IngelheimJardiance | $993 | $87,25078 claims |
| Johnson & JohnsonXarelto | $487 | $65,85851 claims |
| Lilly USA, LLCMounjaro | $530 | $24,51212 claims |
| GSKTrelegy Ellipta | $516 | $18,30421 claims |
| Esperion Therapeutics, Inc.Nexlizet | $379 | $17,30516 claims |
| NovartisEntresto | $567 | $16,73113 claims |
| Astellas Pharma US IncMyrbetriq | $108 | $10,63317 claims |
| AbbVieNamzaric | $454 | $6,88412 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 95th percentile of 1,284 internal medicine providers in Kentucky.
Other internal medicine in Louisville
- Robert SasserLouisville$62K
- Kelley McIntyreLouisville$48K
- Lal TanwaniLouisville$38K
- Mark WilliamsLouisville$33K
- Scott YoungLouisville$24K
- Frank SimonLouisville$22K
- Walter BruningLouisville$22K
- Brian ParadowskiLouisville$20K
- Suresh NairLouisville$20K
- Yiyi TsaiLouisville$19K
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.