Andrew Nicholson, MD
Diagnostic Radiology · Knoxville, TNNPI 1528293701
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (53.8%), speaking fees and travel and lodging — rather than concentrated in one kind of arrangement. Penumbra, Inc. accounts for 60.9% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2020 at $14,154 and has fallen 91.4% since, to $1,214 in 2025. Among diagnostic radiology clinicians in TN 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 297 payments — averaging $116.99 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Penumbra, Inc.$21K
- Saranas, Inc.$7K
- Imperative Care, Inc$3K
- Stryker$2K
- Medtronic$875
- Johnson & Johnson$321
- plus $380 from 4 others
Across 62 payments — averaging $987.50 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.
- Penumbra, Inc.$61K
What the payments were for
- Speaking & faculty fees$11,70034%
- Travel & lodging$4,37013%
- Food & beverage$18,67754%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Penumbra, Inc. | 183 | $21,150 |
| Saranas, Inc. | 3 | $6,963 |
| Imperative Care, Inc | 47 | $2,643 |
| Stryker | 34 | $2,416 |
| Medtronic | 18 | $875 |
| Johnson & Johnson | 3 | $321 |
| Siemens Medical Solutions USA, Inc. | 3 | $237 |
| Philips North America LLC | 3 | $60 |
| GSK | 2 | $54 |
| Microvention, Inc. | 1 | $29 |
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.
- Penumbra System$11,420
- Penumbra SMART Coil$1,275
- Indigo$1,014
- TARGET$725
- Penumbra Coil 400$530
- Smart$525
- ZOOM 88-T LARGE DISTAL PLATFORM$525
- Penumbra Jet 7$523
- SURPASS EVOLVE$451
- ZOOM REPERFUSION CATHETER$440
- POD$343
- RED 72$279
- CorPath Imaging System$224
- TracStarLargeDistalPlatform$167
- Zoom88LargeDistalPlatform$167
- Zoom88_TLargeDitalPlatform$167
- ZoomReperfusionCatheter$167
- NEUROFORM ATLAS$164
- 3D Revascularization$145
- SURPASS$144
How this compares
$34,747 in reported general payments places this provider in the 95th percentile of 757 diagnostic radiology providers in Tennessee.
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 diagnostic radiology in Knoxville
- Gregory MinwellKnoxville$105K
- Daniel HossKnoxville$70K
- Jeffrey MahonyKnoxville$58K
- Robert EberlyKnoxville$42K
- Noel BergquistKnoxville$38K
- Dana FathyKnoxville$30K
- Amanda SquiresKnoxville$17K
- John GoodwinKnoxville$9K
- Donald WalkerKnoxville$7K
- Matthew RamseyKnoxville$7K
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.