Genzyme Corporation
Reporting payments is a legal requirement; large totals often reflect large product portfolios.
$188Mgeneral payments (2019-2025)
$3.6Mresearch payments (2019-2025)
107,951clinicians 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.
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) |
|---|---|---|---|
| Charles Sawyers | New York, NY | Hematology & Oncology | $1,271,522.00 |
| Alexandra Golant | New York, NY | Dermatology | $1,059,846.86 |
| Raj Chovatiya | Chicago, IL | Dermatology | $902,043.24 |
| Guy Young | Bozeman, MT | Pediatric Hematology-Oncology | $828,788.65 |
| Mario Castro | Kansas City, KS | Pulmonary Disease | $816,575.14 |
| Cedric Franklin Rutland | Riverside, CA | Critical Care Medicine (Internal Medicine) | $793,996.06 |
| Marcjonathan Serota | Littleton, CO | Dermatology | $759,567.12 |
| Jonathan Silverberg | Washington, DC | Dermatology | $723,235.89 |
| Matthew Zirwas | Bexley, OH | Dermatology | $667,339.42 |
| Lawrence Eichenfield | San Diego, CA | Pediatric Dermatology | $652,536.86 |
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.