Ardelyx, INC.
Reporting payments is a legal requirement; large totals often reflect large product portfolios.
$6.5Mgeneral payments (2019-2025)
$223Kresearch payments (2019-2025)
28,174clinicians paid
General and research payments are shown separately, never blended. Research payments are often institution-directed and tied to clinical trials.
General payments by year
General payments only, as reported to CMS. Research payments are totaled above and not included in these bars.
Products most associated with its payments
Specialties it works with most
Clinicians with the largest reported totals
Often long-running consulting, speaking, or advisory relationships, which companies must report by law. A large total is not evidence of anything improper.
| Clinician | Location | Specialty | General payments (2019-2025) |
|---|---|---|---|
| Geoffrey Block | Lone Tree, CO | Nephrology (Internal Medicine) | $531,771.17 |
| Glenn Chertow | Stanford, CA | Nephrology (Internal Medicine) | $193,731.98 |
| Darren Brenner | Chicago, IL | Gastroenterology (Internal Medicine) | $173,381.96 |
| Satish Rao | Augusta, GA | Gastroenterology (Internal Medicine) | $154,660.03 |
| Kavita Kongara | Atlanta, GA | Gastroenterology (Internal Medicine) | $151,636.65 |
| Stuart Sprague | Evanston, IL | Nephrology (Internal Medicine) | $108,913.68 |
| Philip Schoenfeld | Ann Arbor, MI | Gastroenterology (Internal Medicine) | $104,926.81 |
| Gregory Sayuk | Saint Louis, MO | Gastroenterology (Internal Medicine) | $103,919.16 |
| Brooks Cash | Houston, TX | Gastroenterology (Internal Medicine) | $87,722.40 |
| Nelson Kopyt | Allentown, PA | Nephrology (Internal Medicine) | $78,696.08 |
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.