Xantasil
Payments companies reported to CMS as associated with Xantasil. "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 Xantasil, 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 Xantasil
These are the largest totals companies reported as associated with Xantasil. 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) |
|---|---|---|---|
| Donald Patacca | Broadview Heights, OH | General Practice (Dentist) | $298.94 |
| Brett Clark | Madison, WI | General Practice (Dentist) | $282.43 |
| Jason Vandehaar | Madison, WI | General Practice (Dentist) | $282.43 |
| Tammy Kalsow | Madison, WI | General Practice (Dentist) | $282.43 |
| Daniel Gober | Brooklyn, NY | Dentist | $197.93 |
| Nicole Farber | Camden, NJ | $192.33 | |
| Gregory Seiden | Levittown, NY | Dentist | $192.33 |
| Samanta Andisco | Port Charlotte, FL | General Practice (Dentist) | $165.44 |
| Jonathan Chan | Roseville, CA | General Practice (Dentist) | $160.90 |
| Nawal Osman | El Dorado Hills, CA | General Practice (Dentist) | $160.90 |
Prescribed Xantasil?
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.