Ryan Knoper, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Maplewood, MNNPI 1376836031
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (43.9%), consulting fees and food and beverage — rather than concentrated in one kind of arrangement. 8 manufacturers reported payments, led by Medtronic at 33.9% of the total. Reporting peaked in 2019 at $5,879 and has fallen 99.2% since, to $47 in 2025.
Across 97 payments — averaging $124.84 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$4K
- Abbott$3K
- Atricure, Inc.$2K
- Edwards Lifesciences$2K
- Zimmer Biomet$319
- Stryker$61
- plus $58 from 2 others
What the payments were for
- Consulting fees$3,75031%
- Travel & lodging$5,31544%
- Food & beverage$2,85024%
- Education$1952%
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) | 12 | $4,106 |
| Abbott | 29 | $3,080 |
| Atricure, Inc. | 14 | $2,460 |
| Edwards Lifesciences | 21 | $2,026 |
| Zimmer Biomet | 18 | $319 |
| Stryker | 1 | $61 |
| Abiomed | 1 | $44 |
| Johnson & Johnson | 1 | $14 |
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.
- Edwards SAPIEN 3 Transcatheter Heart Valve$1,569
- ATRICLIP LAA EXCLUSION SYSTEM$1,256
- SYNERGY ABLATION SYSTEM$1,256
- HeartMate PHP$1,172
- ISOLATOR SURGICAL ABLATION SYSTEM$1,093
- DISSECTOR$1,093
- HeartMate 3 Left Ventricular Dev$1,063
- ATRICURE SYNERGY ABLATION SYSTEM$408
- HeartMate$225
- SAPIEN 3 Ultra RESILIA$166
- Avalus$137
- ATRICURE ATRICLIP LAA EXCLUSION$119
How this compares
$12,109 in reported general payments places this provider in the 85th percentile of 128 thoracic surgery (cardiothoracic vascular surgery) providers in Minnesota.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Minnesota →
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 thoracic surgery (cardiothoracic vascular surgery) in Maplewood
- Vinayak BapatMinneapolis$792K
- Benjamin SunMinneapolis$443K
- Malakh ShresthaRochester$89K
- Juan CrestanelloRochester$56K
- Janani ReisenauerRochester$46K
- Louis JacquesEdina$36K
- Nader MoazamiMinneapolis$28K
- Sarah PalmerMinneapolis$28K
- Matthew GraczykMinneapolis$28K
- Amit BhargavaMinneapolis$27K
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.