Calamus
Payments companies reported to CMS as associated with Calamus. "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 Calamus, 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 Calamus
These are the largest totals companies reported as associated with Calamus. 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) |
|---|---|---|---|
| John West | Tacoma, WA | Endodontics | $216,314.59 |
| Clifford Ruddle | Santa Barbara, CA | Endodontics | $216,314.59 |
| John Stropko | Prescott, AZ | Endodontics | $108,157.29 |
| Amit Batheja | San Diego, CA | Endodontics | $140.18 |
| Michael Nguyen | Dearborn, MI | Dentist | $112.77 |
| Duhli Chen | Tustin, CA | Endodontics | $100.00 |
| Samir Batniji | Diamond Bar, CA | Endodontics | $100.00 |
| Raaed Batniji | Diamond Bar, CA | Dentist | $100.00 |
| Nermine Batniji | Diamond Bar, CA | Endodontics | $100.00 |
| Reid Pullen | Brea, CA | Endodontics | $77.22 |
Prescribed Calamus?
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.