Gmk Sphere Revision System
Payments companies reported to CMS as associated with Gmk Sphere Revision System. "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 Gmk Sphere Revision System, 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 Gmk Sphere Revision System
These are the largest totals companies reported as associated with Gmk Sphere Revision System. 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) |
|---|---|---|---|
| Stephen Howell | Sacramento, CA | Orthopaedic Surgery | $1,672,183.20 |
| Keith Berend | New Albany, OH | Adult Reconstructive Orthopaedic Surgery | $254,210.33 |
| Tyler Goldberg | Austin, TX | Adult Reconstructive Orthopaedic Surgery | $155,142.90 |
| David Scott | Spokane, WA | Adult Reconstructive Orthopaedic Surgery | $126,526.70 |
| David Loucks | Lone Tree, CO | Orthopaedic Surgery | $109,670.37 |
| Alexander Nedopil | Lodi, CA | Surgery | $106,305.24 |
| Robert Greenhow | Lone Tree, CO | Orthopaedic Surgery | $89,658.34 |
| Michael Hellman | Lees Summit, MO | Orthopaedic Surgery | $83,725.87 |
| Brian Culp | Princeton, NJ | Orthopaedic Surgery | $80,596.80 |
| Joseph Greene | Louisville, KY | Orthopaedic Surgery | $78,791.03 |
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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.