Matthias Feldkamp
Neurological Surgery · Maple Grove, MNNPI 1881696052
Payments from drug & device makers
What this record shows
12 manufacturers reported payments, led by Medical Device Business Services, Inc. at 33.7% of the total. Reporting peaked in 2019 at $1,674 and has fallen 77.1% since, to $384 in 2025.
Across 53 payments — averaging $63.51 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medical Device Business Services, Inc.$1K
- Si-bone, Inc.$1K
- Brainlab, Inc.$355
- Medtronic$340
- Johnson & Johnson$170
- Alphatec Spine, Inc$119
- plus $198 from 6 others
What the payments were for
- Travel & lodging$1,69450%
- Food & beverage$1,67250%
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 |
|---|---|---|
| Medical Device Business Services, Inc. | 9 | $1,134 |
| Si-bone, Inc. | 11 | $1,051 |
| Brainlab, Inc. | 4 | $355 |
| Medtronic(2 entities) | 7 | $340 |
| Johnson & Johnson | 9 | $170 |
| Alphatec Spine, Inc | 5 | $119 |
| Orthofix Medical, Inc. | 3 | $64 |
| Centinel Spine, LLC | 1 | $47 |
| Stryker | 1 | $28 |
| Zimvie Inc. | 1 | $22 |
| Smith+Nephew | 1 | $20 |
| Intrinsic Therapeutics | 1 | $18 |
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.
- EXPEDIUM$989
- iFuse Implant$105
- LIORESAL$102
How this compares
$3,366 in reported general payments places this provider in the 65th percentile of 140 neurological surgery providers in Minnesota.
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 |
|---|---|---|
| Gabapentin | 26 | $487 |
| Oxycodone Hcl | 73 | $455 |
| Cyclobenzaprine Hcl | 12 | $112 |
| Hydromorphone Hcl | 12 | $90 |
| Methocarbamol | 23 | $89 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Maple Grove
- Kendall LeeRochester$2.3M
- Michael FinnEdina$1.4M
- Stanley SkinnerMinneapolis$445K
- Rohan LallEdina$227K
- Matthew DaviesDuluth$163K
- Vijay AgarwalRochester$101K
- Frederick HarrisBurnsville$92K
- Andrew GrandeSaint Paul$88K
- Hart GarnerCoon Rapids$74K
- Benjamin ElderRochester$69K
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.