Horizant
Payments companies reported to CMS as associated with Horizant. "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 Horizant, 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 Horizant
These are the largest totals companies reported as associated with Horizant. 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) |
|---|---|---|---|
| John Winkelman | Boston, MA | Sleep Medicine (Psychiatry & Neurology) | $17,393.75 |
| William Ondo | Houston, TX | Neurology (Psychiatry & Neurology) | $4,419.34 |
| Aaron Ellenbogen | Farmington Hills, MI | Neurology (Psychiatry & Neurology) | $4,275.00 |
| Mark Buchfuhrer | Downey, CA | Sleep Medicine (Psychiatry & Neurology) | $1,418.07 |
| Daniel Harrison | Boston, MA | Neurology (Psychiatry & Neurology) | $1,000.00 |
| Jasmin Javaherian | Encino, CA | Internal Medicine | $648.72 |
| Chaim Mandelbaum | New York, NY | Public Health & General Preventive Medicine | $591.93 |
| Hans Knopp | Middlebury, CT | Pain Medicine (Physical Medicine & Rehabilitation) | $587.78 |
| Henry Chen | Brooklyn, NY | Internal Medicine | $566.16 |
| Christine Holloway | New York, NY | Adult Health (Nurse Practitioner) | $505.42 |
Prescribed Horizant?
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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.