Karl Greene
Neurological Surgery · Pleasant Prairie, WINPI 1376535492
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $1,680,819 of the $2,102,298 with a category attached, or 80.0%. Medtronic accounts for 97.9% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2019 at $735,953 and has fallen 77.1% since, to $168,274 in 2025. Among neurological surgery 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 37 payments — averaging $56,819 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$2.1M
- Titan Spine, LLC$43K
- GT Medical Technologies, Inc$166
- Globus Medical$76
- Zimmer Biomet$39
- Covidien LP$33
What the payments were for
- Royalty or licence$1,680,81980%
- Speaking & faculty fees$2,0300%
- Food & beverage$3130%
- Other$419,13620%
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 |
|---|---|---|
| Medtronic(2 entities) | 31 | $2,058,676 |
| Titan Spine, LLC | 2 | $43,309 |
| GT Medical Technologies, Inc | 1 | $166 |
| Globus Medical | 1 | $76 |
| Zimmer Biomet | 1 | $39 |
| Covidien LP | 1 | $33 |
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.
- nanoLOCK-C$325,947
- nanoLOCK-L$223,626
- nanoLOCK$43,309
- Endoskeleton$43,309
- GammaTile$166
How this compares
$2,102,298 in reported general payments places this provider in the 95th percentile of 133 neurological surgery providers in Wisconsin.
Other neurological surgery in Pleasant Prairie
- Brian WalcottPleasant Prairie$19K
- Shaun OlearyPleasant Prairie$5K
- Michael CaseyPleasant Prairie$3K
- Amin KassamMilwaukee$1M
- Thomas WascherAppleton$570K
- Max LeeMilwaukee$456K
- Kevin WojcikMilwaukee$58K
- Saman ShabaniMilwaukee$56K
- Marjorie WangMilwaukee$52K
- Azam AhmedMadison$35K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.