Marc Stam, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Winchster, VANPI 1487690186
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (41.4%), travel and lodging and education — rather than concentrated in one kind of arrangement. 22 manufacturers reported payments, led by Intuitive Surgical at 26.7% of the total. Reporting peaked in 2019 at $6,688 and has fallen 84.1% since, to $1,061 in 2025.
Across 127 payments — averaging $104.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$4K
- Atricure, Inc.$3K
- Medtronic$3K
- Edwards Lifesciences$2K
- Abiomed$397
- CGG Medical Inc$244
- plus $1K from 16 others
What the payments were for
- Consulting fees$7005%
- Travel & lodging$4,06031%
- Food & beverage$5,51341%
- Education$3,03023%
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 |
|---|---|---|
| Intuitive Surgical | 5 | $3,552 |
| Atricure, Inc. | 24 | $3,185 |
| Medtronic(2 entities) | 39 | $2,776 |
| Edwards Lifesciences | 31 | $2,046 |
| Abiomed | 6 | $397 |
| CGG Medical Inc | 3 | $244 |
| Johnson & Johnson | 2 | $143 |
| Eagle Pharmaceuticals, Inc. | 1 | $137 |
| Bayer | 1 | $125 |
| Shockwave Medical, Inc | 1 | $112 |
| Boston Scientific | 2 | $99 |
| Arthrex | 1 | $93 |
| Kls-martin L.p. | 1 | $89 |
| Stryker | 1 | $85 |
| Midsouth Orthopedics Inc. | 1 | $42 |
| Haemonetics Corporation | 1 | $32 |
| GE HealthCare | 1 | $30 |
| Getinge USA Sales, LLC | 1 | $27 |
| Convatec Inc. | 1 | $27 |
| Davol Inc. | 1 | $23 |
| Lemaitre Vascular, Inc. | 2 | $23 |
| Merck | 1 | $16 |
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.
- Da Vinci Surgical System$3,514
- ATRICURE SYNERGY ABLATION SYSTEM$1,862
- CoreValve Evolut$1,416
- Edwards SAPIEN 3 Transcatheter Heart Valve$1,027
- EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX$221
- MITRIS RESILIA Mitral Valve$163
- Impella$141
- BARHEMSYS$137
- EPI-SENSE GUIDED COAGULATION SYS$125
- Kerendia$125
- XARELTO$125
- ATRICURE ATRICLIP LAA EXCLUSION$117
- Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter$112
- COREVALVE EVOLUT R$112
How this compares
$13,303 in reported general payments places this provider in the 75th percentile of 109 thoracic surgery (cardiothoracic vascular surgery) providers in Virginia.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Virginia →
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 Winchster
- Clinton KempNorfolk$367K
- Sandeep KhandharFairfax$261K
- Mark CooperHampton$219K
- Linda MartinCharlottesville$76K
- Kenneth SaumLynchburg$56K
- Michael WeyantFalls Church$47K
- Mark JosephRoanoke$44K
- Justin MilliganVirginia Beach$42K
- Christopher BarreiroNorfolk$41K
- Alan SpeirFalls Church$39K
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.