Robert Kohen, MD
Sports Medicine · Warren, MINPI 1780809574
Payments from drug & device makers
What this record shows
The money is spread across several categories — speaking fees (48.5%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. 17 manufacturers reported payments, led by Arthrex at 50.1% of the total. Reporting peaked in 2022 at $4,481 and has fallen 93.0% since, to $316 in 2025.
Across 56 payments — averaging $147.20 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Arthrex$4K
- Smith+Nephew$1K
- Stryker$887
- Pinnacle, Inc$642
- Zimmer Biomet$394
- GSK$220
- plus $655 from 11 others
What the payments were for
- Speaking & faculty fees$4,00049%
- Travel & lodging$6037%
- Food & beverage$3,64144%
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 |
|---|---|---|
| Arthrex | 4 | $4,130 |
| Smith+Nephew | 14 | $1,316 |
| Stryker(2 entities) | 9 | $887 |
| Pinnacle, Inc | 4 | $642 |
| Zimmer Biomet | 5 | $394 |
| GSK | 2 | $220 |
| Next Science LLC | 1 | $110 |
| Pacira Therapeutics, Inc. | 1 | $105 |
| Medacta USA, Inc. | 1 | $104 |
| Amgen | 1 | $93 |
| Orthofix Medical, Inc. | 5 | $79 |
| Johnson & Johnson | 4 | $63 |
| Convatec Inc. | 1 | $34 |
| Vertex | 1 | $20 |
| Pacira Pharmaceuticals Incorporated | 1 | $19 |
| Ferring Pharmaceuticals Inc. | 1 | $15 |
| Theragen, Inc. | 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.
- MICRORAPTOR Knotless Anchor$269
- BLUEPRINT PATIENT SPECIFIC INSTRUMENTATION$266
- AEQUALIS PERFORM$163
- PROLAYER$148
- Juggerknotless Soft Anchor$147
- WEREWOLF$137
- LENS 4K$136
- MICRORAPTOR$121
- REGENESORB$118
- SurgX$110
- Xperience$110
- Zilretta$105
- REVERSE SHOULDER$104
- BIOLOGICS CONSUMABLES AUTOLOGOUS BLOOD PRODUCTS ANGEL PRP$100
How this compares
$8,243 in reported general payments places this provider in the 80th percentile of 145 sports medicine 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 |
|---|---|---|
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 300 | $1,359 |
| Lidocaine | 14 | $1,325 |
| Mupirocin | 102 | $514 |
| Tramadol Hcl | 273 | $514 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 52 | $262 |
| Amoxicillin | 56 | $248 |
| Ondansetron Hcl | 22 | $140 |
| Clindamycin Hcl | 11 | $107 |
| Ibuprofen | 16 | $71 |
Paid to pharmacies, not to this prescriber.
Other sports medicine in Warren
- John RyanWarren$12K
- Tariq AwanFarmington Hills$113K
- Michael YusafAuburn Hills$101K
- Jack PinneyMidland$67K
- William KestoNovi$62K
- Kendall HamiltonGrand Rapids$61K
- Carl WierksGrand Rapids$59K
- Manuel SchubertYpsilanti$42K
- Hussein SaadDearborn$40K
- Vasilios MoutzourosDetroit$40K
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.