Onyx 18
Payments companies reported to CMS as associated with Onyx 18. "Associated with" is CMS's wording: it links a payment to a product without saying the money was spent on it.
By year
Payments reported as associated with Onyx 18, per program year, as reported to CMS.
Who makes it
Specialties most often involved
Where the associated payments went, by the receiving clinician's specialty.
Clinicians most associated with Onyx 18
These are the largest totals companies reported as associated with Onyx 18. They are typically speaking or consulting arrangements, which companies must report by law; appearing here is not evidence of anything improper.
| Clinician | Location | Specialty | Associated payments (2023-2025) |
|---|---|---|---|
| Bharathi Jagadeesan | Minneapolis, MN | Diagnostic Radiology | $162,115.96 |
| Jared Knopman | New York, NY | Neurological Surgery | $20,550.00 |
| Jason Davies | Buffalo, NY | Neurological Surgery | $17,035.07 |
| Tareq Kass-Hout | Chicago, IL | Vascular Neurology | $10,521.11 |
| Daniel Sahlein | Carmel, IN | Vascular & Interventional Radiology | $9,371.25 |
| Augusto Elias | Wyoming, MI | Neuroradiology | $8,264.33 |
| Jan-Karl Burkhardt | New York, NY | Neurological Surgery | $6,150.00 |
| Ziad Hage | Charlotte, NC | Neurology (Psychiatry & Neurology) | $5,500.00 |
| Maksim Shapiro | New York, NY | Neuroradiology | $5,222.97 |
| Maxim Mokin | Tampa, FL | Vascular Neurology | $4,898.26 |
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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.