Flex-X
Payments companies reported to CMS as associated with Flex-X. "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 Flex-X, 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 Flex-X
These are the largest totals companies reported as associated with Flex-X. 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) |
|---|---|---|---|
| Sriharan Sivalingam | Cleveland, OH | Urology | $30,792.29 |
| Bristol Whiles | Kansas City, KS | Urology | $22,487.58 |
| Michael Lipkin | Durham, NC | Urology | $12,388.56 |
| Wilson Molina | Kansas City, KS | Urology | $10,729.87 |
| Ilya Sobol | Virginia Beach, VA | Urology | $7,452.10 |
| Amy Krambeck | Chicago, IL | Urology | $6,325.00 |
| Matthew Dunn | Santa Monica, CA | Urology | $6,304.83 |
| Marawan El Tayeb | Temple, TX | Urology | $5,970.04 |
| Jean Ung | Winfield, IL | Urology | $2,868.29 |
| Brian Eisner | Boston, MA | Urology | $1,725.00 |
Prescribed Flex-X?
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.