David Knight, MD
Vascular & Interventional Radiology · West Columbia, SCNPI 1417986902
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $7,654 of the $8,854 with a category attached, or 86.4%. 35 manufacturers reported payments, led by Medtronic at 41.4% of the total. Reporting peaked in 2023 at $2,587 and has fallen 75.5% since, to $633 in 2025.
Across 294 payments — averaging $30.12 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$4K
- Imperative Care, Inc$752
- Inari Medical, Inc.$731
- Boston Scientific$542
- Philips North America LLC$528
- Bard Peripheral Vascular, Inc.$364
- plus $2K from 29 others
What the payments were for
- Consulting fees$1,20014%
- Food & beverage$7,65486%
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 |
|---|---|---|
| Medtronic(3 entities) | 77 | $3,666 |
| Imperative Care, Inc | 21 | $752 |
| Inari Medical, Inc. | 26 | $731 |
| Boston Scientific | 29 | $542 |
| Philips North America LLC | 17 | $528 |
| Bard Peripheral Vascular, Inc. | 23 | $364 |
| Siemens Medical Solutions USA, Inc. | 8 | $352 |
| Angiodynamics, Inc. | 13 | $297 |
| W. L. Gore & Associates, Inc. | 9 | $238 |
| Shockwave Medical, Inc | 9 | $180 |
| Cardiovascular Systems Inc. | 8 | $132 |
| Johnson & Johnson | 4 | $109 |
| Surmodics, Inc. | 7 | $92 |
| Cardiva Medical, Inc. | 4 | $85 |
| Terumo Medical Corporation | 5 | $80 |
| Abbott | 3 | $78 |
| Cook Medical LLC | 4 | $70 |
| Guerbet LLC | 2 | $55 |
| Penumbra, Inc. | 2 | $53 |
| Stryker | 3 | $50 |
| Trisalus Life Sciences, Inc. | 2 | $49 |
| Sirtex Medical Inc | 3 | $48 |
| Varian Medical Systems, Inc. | 2 | $47 |
| Biosense Webster, Inc. | 1 | $39 |
| Cordis US CORP. | 2 | $37 |
| Avanos Medical | 1 | $28 |
| Cagent Vascular Inc | 1 | $27 |
| Balt USA, LLC | 1 | $19 |
| BD | 1 | $18 |
| Eagle Pharmaceuticals, Inc. | 1 | $16 |
| Viz.ai, Inc. | 1 | $16 |
| Histosonics, Inc. | 1 | $16 |
| Silk Road Medical, Inc. | 1 | $15 |
| Teleflex LLC | 1 | $13 |
| Cardinal Health 200 LLC | 1 | $13 |
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
$8,854 in reported general payments places this provider in the 75th percentile of 61 vascular & interventional radiology providers in South Carolina.
See all vascular & interventional radiology providers in South Carolina →
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 vascular & interventional radiology in West Columbia
- William BrehmerWest Columbia$11K
- Jonathan WestWest Columbia$10K
- George RuebWest Columbia$7K
- Christopher McCartyWest Columbia$4K
- Marcelo GuimaraesCharleston$609K
- Nilesh PatelMyrtle Beach$201K
- Aron DevaneGreenville$112K
- Ricardo YamadaCharleston$73K
- Claudio SchonholzCharleston$53K
- Antony GayedGreenville$37K
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.