Indigo System
Payments companies reported to CMS as associated with Indigo System. "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 Indigo System, 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 Indigo System
These are the largest totals companies reported as associated with Indigo System. 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) |
|---|---|---|---|
| Santhosh Mathews | Bradenton, FL | Interventional Cardiology | $474,754.57 |
| Frank Arko | Charlotte, NC | Vascular Surgery | $301,733.47 |
| Suhail Dohad | Beverly Hills, CA | Interventional Cardiology | $225,365.88 |
| Martyn Knowles | Raleigh, NC | Surgery | $196,744.58 |
| Patrick Muck | Cincinnati, OH | Vascular Surgery | $184,605.82 |
| Constantino Pena | Miami, FL | Diagnostic Radiology | $171,682.01 |
| Adel Barkat | Tulsa, OK | Vascular Surgery | $154,941.13 |
| Parag Patel | Milwaukee, WI | Vascular & Interventional Radiology | $147,367.64 |
| Robert Lookstein | New York, NY | Vascular & Interventional Radiology | $141,142.85 |
| Sameh Sayfo | Plano, TX | Interventional Cardiology | $122,186.58 |
Prescribed Indigo System?
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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.