Concentrates
Payments companies reported to CMS as associated with Concentrates. "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 Concentrates, 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 Concentrates
These are the largest totals companies reported as associated with Concentrates. 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) |
|---|---|---|---|
| Daniel Richey | Fort Worth, TX | Nephrology (Internal Medicine) | $147.85 |
| Susan Guo | Tacoma, WA | Radiation Oncology | $147.85 |
| John Schwartz | Dallas, TX | Nephrology (Internal Medicine) | $147.85 |
| Stephen Regina | Desoto, TX | Nephrology (Internal Medicine) | $147.85 |
| Kim Rice | Dallas, TX | Nephrology (Internal Medicine) | $147.85 |
| Paul Skluzacek | Desoto, TX | Nephrology (Internal Medicine) | $147.85 |
| Michael Wiederkehr | Dallas, TX | Nephrology (Internal Medicine) | $147.85 |
| Geoffrey Walker | Irving, TX | Nephrology (Internal Medicine) | $147.84 |
| Suresh Chirumamilla | Irving, TX | Nephrology (Internal Medicine) | $147.84 |
| Hania Kassem | Houston, TX | Nephrology (Internal Medicine) | $45.56 |
Prescribed Concentrates?
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.