Joanna Kemp, MD
Neurological Surgery · Saint Louis, MONPI 1326277526
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (51.3%), food and beverage and entertainment — rather than concentrated in one kind of arrangement. Medtronic accounts for 77.9% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2022 at $4,381 and has fallen 90.8% since, to $403 in 2025.
Across 61 payments — averaging $92.56 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$4K
- Johnson & Johnson$827
- Zimmer Biomet$179
- GT Medical Technologies, Inc$151
- VGI Medical, LLC$39
- Corelink, LLC$25
- plus $29 from 2 others
What the payments were for
- Travel & lodging$2,89851%
- Food & beverage$2,70948%
- Entertainment$391%
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) | 39 | $4,396 |
| Johnson & Johnson(2 entities) | 12 | $827 |
| Zimmer Biomet | 5 | $179 |
| GT Medical Technologies, Inc | 1 | $151 |
| VGI Medical, LLC | 1 | $39 |
| Corelink, LLC | 1 | $25 |
| Stryker | 1 | $14 |
| Integra Lifesciences Corporation | 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.
- CD HORIZON SPINAL SYSTEM$1,741
- MATRIXNEURO$509
- GammaTile$151
- STEALTHSTATION S8 PLATFORM$136
- MAZOR X SYSTEM$113
- TRUMATCH$100
How this compares
$5,646 in reported general payments places this provider in the 65th percentile of 172 neurological surgery providers in Missouri.
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 neurological surgery in Saint Louis
- Neill WrightSaint Louis$1.1M
- Wilson RaySaint Louis$586K
- Camilo MolinaSaint Louis$412K
- Paul SantiagoSaint Louis$368K
- Daniel ScodarySaint Louis$278K
- Daniel HafezSaint Louis$273K
- John OgunladeSaint Louis$220K
- Joshua OsbunSaint Louis$98K
- Adewale BakareSaint Louis$81K
- Eric LeuthardtSaint Louis$78K
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.