Amon Liu
Neuroradiology · Redwood City, CANPI 1447302666
Payments from drug & device makers
What this record shows
The money is spread across several categories — speaking fees (37.1%), consulting fees and royalties or licence payments — rather than concentrated in one kind of arrangement. Medtronic accounts for 96.7% of it on its own, with 2 other manufacturers making up the rest. Reporting peaked in 2019 at $338,457 and has fallen 80.3% since, to $66,625 in 2025. Among neuroradiology 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 129 payments — averaging $8844.50 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$1.1M
- Stryker$26K
- Microvention, Inc.$12K
Across 35 payments — averaging $835.09 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Microvention, Inc.$29K
Across 2 payments — averaging $3,275,570 each. An ownership or investment interest held by the physician or an immediate family member.
- Scientia Vascular$6.6M
What the payments were for
- Royalty or licence$219,75719%
- Consulting fees$281,57525%
- Speaking & faculty fees$423,00037%
- Travel & lodging$4,9040%
- Food & beverage$7370%
- Other$210,96718%
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 |
|---|---|---|
| Medtronic(2 entities) | 119 | $1,102,851 |
| Stryker | 3 | $25,800 |
| Microvention, Inc. | 7 | $12,289 |
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.
How this compares
$1,140,940 in reported general payments places this provider in the 95th percentile of 154 neuroradiology providers in California.
Other neuroradiology in Redwood City
- Aaron BerezMountain View$24.1M
- Fabio SettecaseSan Francisco$758K
- Michael MarksStanford$254K
- Huy DoStanford$226K
- Akash KansagraStanford$179K
- Bradley JabourSanta Monica$156K
- Christopher PutmanTorrance$148K
- Nicholas TelischakStanford$148K
- Jay AcharyaWest Hollywood$128K
- Reza JahanLos Angeles$75K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.