Essx
Payments companies reported to CMS as associated with Essx. "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 Essx, 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 Essx
These are the largest totals companies reported as associated with Essx. 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 O'Brien | Omaha, NE | Otolaryngology | $146.19 |
| Molli Neilson | Ogden, UT | Physician Assistant | $127.92 |
| Nadim Bikhazi | Ogden, UT | Otolaryngology | $127.92 |
| Kylan Peterson | Twin Falls, ID | Otolaryngology/Facial Plastic Surgery | $46.60 |
| Russell Mayes | Twin Falls, ID | Otolaryngology/Facial Plastic Surgery | $46.60 |
| Chau Nguyen | Ventura, CA | Otolaryngology | $36.43 |
| Mika Sumiyoshi | Sacramento, CA | Pediatric Otolaryngology | $36.43 |
| Alexa Castellano | Ventura, CA | Otolaryngology | $36.43 |
| Kanwar Kelley | Orinda, CA | Otolaryngology | $23.86 |
| Ashley Jezierski | Stanford, CA | Physician Assistant | $17.43 |
Prescribed Essx?
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.