Seth Gamradt, MD
Sports Medicine · Los Angeles, CANPI 1366642753
Payments from drug & device makers
What this record shows
The money is spread across several categories — royalties or licence payments (46.6%), consulting fees and education — rather than concentrated in one kind of arrangement. Zimmer Biomet accounts for 92.6% of it on its own, with 5 other manufacturers making up the rest. 2025 is the largest year on record at $142,459, more than ten times the $1,906 reported in 2019. Among sports medicine clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 369 payments — averaging $1535.38 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$525K
- Exactech, Inc.$41K
- Arthrex$388
- Stryker$294
- Smith+Nephew$175
- Micromed Inc$117
What the payments were for
- Royalty or licence$263,88747%
- Consulting fees$211,06337%
- Travel & lodging$26,4515%
- Food & beverage$4,4041%
- Education$60,75011%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Zimmer Biomet | 307 | $524,568 |
| Exactech, Inc. | 36 | $41,013 |
| Arthrex | 15 | $388 |
| Stryker | 6 | $294 |
| Smith+Nephew | 3 | $175 |
| Micromed Inc | 2 | $117 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- Comprehensive Glenoid$113,888
- COMPREHENSIVE$74,275
- Comprehensive Shoulder System$49,222
- EQUINOXE$40,182
- PSI Knee$28,806
- ALLIANCE$27,269
- Alliance Glenoid$24,931
- Comprehensive Anatomic$22,750
- Comprehensive Reverse$13,875
- ROSA$13,688
- Juggerknotless Soft Anchor$12,854
- Avenir$5,531
- Patient Care$4,000
- PSI Anatomical Shoulder$2,750
- PD-Extremities-New Product$2,625
- Signature Glenoid Guides$2,625
- Comprehensive Primary Stem$411
- BioWick X$149
- Viaflow$142
- INBONE$142
How this compares
$566,555 in reported general payments places this provider in the 95th percentile of 662 sports medicine providers in California.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other sports medicine in Los Angeles
- Neal ElattracheLos Angeles$51M
- Carleton VangsnessLos Angeles$872K
- Michael BanffyLos Angeles$578K
- Reza OmidLos Angeles$400K
- Orr LimpisvastiLos Angeles$335K
- George HatchLos Angeles$255K
- David McAllisterLos Angeles$186K
- Alexander WeberLos Angeles$82K
- James TiboneLos Angeles$74K
- Carlos UquillasLos Angeles$68K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.