Gamunex-C
Payments companies reported to CMS as associated with Gamunex-C. "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 Gamunex-C, 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 Gamunex-C
These are the largest totals companies reported as associated with Gamunex-C. 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) |
|---|---|---|---|
| Suraj Muley | Phoenix, AZ | Neurology (Psychiatry & Neurology) | $156,542.68 |
| Gil Wolfe | Buffalo, NY | Neurology (Psychiatry & Neurology) | $116,764.42 |
| Jonathan Katz | San Francisco, CA | Neurology (Psychiatry & Neurology) | $58,629.92 |
| John England | New Orleans, LA | Neurology (Psychiatry & Neurology) | $57,078.98 |
| Salman Bhai | Dallas, TX | Neurology (Psychiatry & Neurology) | $48,535.41 |
| Rossitza Chichkova | Tampa, FL | Neurology (Psychiatry & Neurology) | $42,680.75 |
| Samir Macwan | Rancho Mirage, CA | Neuromuscular Medicine (Psychiatry & Neurology) | $42,073.18 |
| Kourosh Rezania | Chicago, IL | Neurology (Psychiatry & Neurology) | $29,056.46 |
| Perry Shieh | Los Angeles, CA | Neurology (Psychiatry & Neurology) | $26,013.96 |
| Karissa Gable | Durham, NC | Neurology (Psychiatry & Neurology) | $23,594.81 |
Prescribed Gamunex-C?
See what its makers reported for your doctor. Two steps, private, no account.
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.