John Keller, MD
Neurological Surgery · Grand Rapids, MINPI 1770664583
Payments from drug & device makers
Across 920 payments — averaging $1166.22 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Happe Spine$780K
- Augmedics Inc.$236K
- Medtronic$37K
- Cutting Edge Spine, LLC$15K
- Surgalign Spine Technologies, Inc.$4K
- Centinel Spine, LLC$1K
- plus $553 from 8 others
What the payments were for
- Royalty or licence$14,53425%
- Consulting fees$7,24012%
- Speaking & faculty fees$22,69039%
- Travel & lodging$1,5443%
- Food & beverage$12,02321%
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 |
|---|---|---|
| Happe Spine | 7 | $779,864 |
| Augmedics Inc. | 10 | $235,620 |
| Medtronic(2 entities) | 879 | $36,898 |
| Cutting Edge Spine, LLC | 4 | $14,534 |
| Surgalign Spine Technologies, Inc. | 5 | $4,150 |
| Centinel Spine, LLC | 5 | $1,302 |
| Carlsmed, Inc. | 1 | $170 |
| Intrinsic Therapeutics | 1 | $146 |
| Spineology Inc. | 2 | $77 |
| Xtant Medical Inc | 2 | $48 |
| Bioventus LLC | 1 | $32 |
| Baxter Healthcare | 1 | $28 |
| Abbott | 1 | $27 |
| Merck | 1 | $24 |
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.
- MazorX - Renaissance$10,955
- MAZOR X SYSTEM$7,848
- coflex$4,050
- Xvision$2,966
- Mazor X Stealth Edition$2,571
- PRODISC C VIVO$920
- O-ARM-Spine$421
- BARRICAID ACD (ANNULAR CLOSURE DEVICE)$293
- PRODISC C$195
- INTELLIS$176
- aprevo$170
- PIVOX Oblique Lateral Spinal System$157
- PRODISC L$152
- O-ARM-ST$142
- DIVERGENCE$142
How this compares
$1,072,922 in reported general payments places this provider in the 95th percentile of 256 neurological surgery providers in Michigan.
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 |
|---|---|---|
| Nabumetone | 23 | $361 |
| Celecoxib | 18 | $182 |
| Methylprednisolone | 21 | $131 |
| Cephalexin | 13 | $93 |
| Methocarbamol | 20 | $90 |
| Mupirocin | 12 | $78 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Grand Rapids
- Justin SingerGrand Rapids$1.5M
- Justin ClarkGrand Rapids$83K
- Paul MazarisGrand Rapids$73K
- Luyuan LiGrand Rapids$59K
- Sanjay PatraGrand Rapids$58K
- Bryan FigueroaGrand Rapids$35K
- Travis HamiltonGrand Rapids$25K
- Konstantin ElisevichGrand Rapids$24K
- Joseph PetronioGrand Rapids$21K
- Frank LamarcaAnn Arbor$4.9M
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.