Daniel Knapp, DO
Diagnostic Radiology · Waukesha, WINPI 1629413927
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 94.0% of the total across 98 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 16 manufacturers reported payments, led by Inari Medical, Inc. at 48.5% of the total. Reporting peaked in 2023 at $2,251 and has fallen 98.9% since, to $24 in 2025. Among diagnostic radiology clinicians in WI 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 98 payments — averaging $76.55 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Inari Medical, Inc.$4K
- Boston Scientific$1K
- Argon Medical Devices, Inc.$450
- Terumo Medical Corporation$307
- Penumbra, Inc.$271
- Angiodynamics, Inc.$260
- plus $1K from 10 others
What the payments were for
- Consulting fees$4506%
- Food & beverage$7,05194%
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 |
|---|---|---|
| Inari Medical, Inc. | 35 | $3,636 |
| Boston Scientific | 21 | $1,115 |
| Argon Medical Devices, Inc. | 1 | $450 |
| Terumo Medical Corporation | 4 | $307 |
| Penumbra, Inc. | 3 | $271 |
| Angiodynamics, Inc. | 3 | $260 |
| Bard Peripheral Vascular, Inc. | 17 | $246 |
| Veryan Medical Incorporated | 2 | $221 |
| Balt USA, LLC | 3 | $179 |
| W. L. Gore & Associates, Inc. | 1 | $170 |
| Medtronic | 2 | $162 |
| Sirtex Medical Inc | 1 | $155 |
| Biocompatibles, Inc. | 2 | $151 |
| Shockwave Medical, Inc | 1 | $148 |
| Johnson & Johnson | 1 | $16 |
| Microvention, Inc. | 1 | $15 |
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.
- FLOWTRIEVER CATHETER, S$3,394
- CT THROMBECTOMY SYSTEM KIT$2,122
- CLEANER$450
- Azur CX Detachable$271
- TheraSphere Y90 Glass Microspheres 10 GBq$229
- GORE VIABAHN Endoprosthesis with Heparin$170
- BioMimics 3D Vascular Stent System$168
- SIR-Spheres Microspheres$155
- Vascular Lithotripsy$148
- CONCERTOTM$148
- HydroPearl$146
- Navicross$146
- Prestige Coil System$142
- Penumbra System$139
- FlowTriever$138
- ClotTriever$138
- AlphaVac$136
- R2P MISAGO$125
- ELUVIA$120
- THERASPHERE-BIO$105
How this compares
$7,501 in reported general payments places this provider in the 95th percentile of 747 diagnostic radiology providers in Wisconsin.
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 diagnostic radiology in Waukesha
- Thaddeus MaguireWaukesha$4K
- Lawrence LinWaukesha$2K
- Petar DuvnjakMilwaukee$552K
- Jeffrey KanneMadison$227K
- Sina MeisamyMadison$183K
- Perry PickhardtMadison$108K
- Thomas GallagherMadison$64K
- Mark WelnickGreen Bay$41K
- Ali PirastehMadison$39K
- Scott ReederMadison$39K
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.