Mark Keldahl, MD
Surgery · Chicago, ILNPI 1114181658
Payments from drug & device makers
Across 258 payments — averaging $2963.48 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Lemaitre Vascular, Inc.$748K
- Angiodynamics, Inc.$8K
- Abbott$4K
- Inari Medical, Inc.$2K
- W. L. Gore & Associates, Inc.$372
- Stryker$355
- plus $2K from 15 others
What the payments were for
- Consulting fees$747,60598%
- Travel & lodging$6,3551%
- Food & beverage$10,6191%
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 |
|---|---|---|
| Lemaitre Vascular, Inc. | 97 | $747,872 |
| Angiodynamics, Inc. | 56 | $7,918 |
| Abbott | 59 | $4,260 |
| Inari Medical, Inc. | 14 | $2,195 |
| W. L. Gore & Associates, Inc. | 2 | $372 |
| Stryker | 5 | $355 |
| Limflow Inc. | 2 | $341 |
| Medtronic | 3 | $261 |
| Johnson & Johnson(2 entities) | 3 | $198 |
| Bard Peripheral Vascular, Inc. | 1 | $170 |
| Kerecis Limited | 3 | $143 |
| Neuros Medical, Inc. | 1 | $134 |
| Silk Road Medical, Inc. | 1 | $78 |
| Penumbra, Inc. | 1 | $68 |
| Smith+Nephew | 3 | $48 |
| Organogenesis Inc. | 2 | $42 |
| Davol Inc. | 1 | $35 |
| Philips North America LLC | 1 | $34 |
| Teleflex LLC | 1 | $20 |
| Siemens Medical Solutions USA, Inc. | 1 | $19 |
| Axogen | 1 | $14 |
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.
- RESTOREFLOW$354,022
- RESTOREFLO$260,836
- HYDRO LEMAITRE VALVULOTOME$132,677
- Auryon Laser System 100-120 Vac$4,311
- Omnilink Elite vascular stent system$1,817
- AngioVac$1,781
- FLOWTRIEVER CATHETER, S$1,687
- CT THROMBECTOMY SYSTEM KIT$1,687
- AlphaVac$830
- LIMFLOW SYSTEM$591
- Kerecis SurgiClose$467
- EXCLUDER Conformable AAA Endoprosthesis with Active Control$372
- Perclose ProGlide suture mediated closure system$360
- Supera peripheral stent system$340
- Perclose ProStyle$233
- Lutonix Drug Coated Balloon$170
- ENDURANT IIS$143
- Altius$134
- PERCLOSE PROGLIDE$127
- XARELTO$121
How this compares
$764,578 in reported general payments places this provider in the 95th percentile of 1,180 surgery providers in Illinois.
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 |
|---|---|---|
| XareltoRivaroxaban | 26 | $26,440 |
| ClopidogrelClopidogrel Bisulfate | 54 | $306 |
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 14 | $137 |
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 |
|---|---|---|
| Johnson & JohnsonXarelto | $198 | $26,44026 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 1,180 surgery providers in Illinois.
Other surgery in Chicago
- Francesco BiancoChicago$1.2M
- Rami LutfiChicago$411K
- Shabirhusain AbadinChicago$212K
- Jonah StulbergChicago$209K
- Julie DunderdaleChicago$205K
- Pier GiulianottiChicago$135K
- Richard ZhuChicago$128K
- Eric HungnessChicago$126K
- Kyle MuellerChicago$117K
- Benjamin JohnsonChicago$115K
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.