Siros
Payments companies reported to CMS as associated with Siros. "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 Siros, 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 Siros
These are the largest totals companies reported as associated with Siros. 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) |
|---|---|---|---|
| Karthik Madhavan | Cherry Hill, NJ | Neurological Surgery | $9,621.96 |
| Marshal Peris | Mount Kisco, NY | Orthopaedic Surgery of The Spine | $2,500.00 |
| Alain Fabi | Kalamazoo, MI | Neurological Surgery | $2,310.04 |
| Dennis Meredith | Woodland, CA | Orthopaedic Surgery of The Spine | $2,190.75 |
| Michael Hasz | Reston, VA | Orthopaedic Surgery of The Spine | $272.67 |
| George Al Shamy | Shenandoah, TX | Neurological Surgery | $221.55 |
| Tung Nguyen | Nashua, NH | Neurological Surgery | $217.01 |
| Laura Schlotzhauer | Overland Park, KS | Family | $114.51 |
| Zachary Wilt | Egg Harbor Twp, NJ | Orthopaedic Surgery | $106.79 |
| Gurpal Pannu | Palos Hills, IL | Orthopaedic Surgery of The Spine | $94.97 |
Prescribed Siros?
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.