Argenx US, INC.
Reporting payments is a legal requirement; large totals often reflect large product portfolios.
$13Mgeneral payments (2019-2025)
$137Kresearch payments (2019-2025)
10,929clinicians 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) |
|---|---|---|---|
| Pamela Klein | Los Angeles, CA | $1,800,882.31 | |
| Pamela Klein | San Francisco, CA | Hematology & Oncology | $509,601.13 |
| Jeffery Allen | Minneapolis, MN | Neurology (Psychiatry & Neurology) | $269,994.76 |
| Kenneth Gorson | Wellesley, MA | Neurology (Psychiatry & Neurology) | $266,190.60 |
| Tuan Vu | Tampa, FL | Neurology (Psychiatry & Neurology) | $236,681.07 |
| Samir Macwan | Rancho Mirage, CA | Neuromuscular Medicine (Psychiatry & Neurology) | $218,517.45 |
| Barry Vaught | Crab Orchard, WV | Neurology (Psychiatry & Neurology) | $208,337.88 |
| Nicholas Silvestri | Buffalo, NY | Neuromuscular Medicine (Psychiatry & Neurology) | $200,914.87 |
| Raghav Govindarajan | O Fallon, IL | Neuromuscular Medicine (Psychiatry & Neurology) | $198,509.27 |
| Suraj Muley | Phoenix, AZ | Neurology (Psychiatry & Neurology) | $189,767.56 |
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.