Q-Mix
Payments companies reported to CMS as associated with Q-Mix. "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 Q-Mix, 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 Q-Mix
These are the largest totals companies reported as associated with Q-Mix. 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) |
|---|---|---|---|
| Sergio Kuttler | Plantation, FL | Endodontics | $562,293.84 |
| Clifford Ruddle | Santa Barbara, CA | Endodontics | $300,000.00 |
| Beth Damas | Oak Lawn, IL | Endodontics | $22,417.82 |
| Reid Pullen | Brea, CA | Endodontics | $20,821.89 |
| Joseph Bernier-Rodriguez | Ft Gordon, GA | Dentist | $15,594.91 |
| Karl Woodmansey | Dallas, TX | Endodontics | $14,459.63 |
| David Landwehr | Madison, WI | Endodontics | $6,255.37 |
| Diwakar Kinra | Flint, MI | Endodontics | $5,581.39 |
| Asgeir Sigurdsson | New York, NY | Endodontics | $4,532.67 |
| Matthew Chesler | San Diego, CA | Endodontics | $4,135.22 |
Prescribed Q-Mix?
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.