Darryl Weiman, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Knoxville, TNNPI 1558472043
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.1% of the total across 48 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 14 manufacturers reported payments, led by Zimmer Biomet at 26.4% of the total. Reporting peaked in 2024 at $905 and has fallen 82.7% since, to $156 in 2025. That places this record below the midpoint for thoracic surgery (cardiothoracic vascular surgery) clinicians in TN, where the typical reported total is $4,482.
Across 48 payments — averaging $31.59 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$400
- Atricure, Inc.$312
- Edwards Lifesciences$237
- Artivion, Inc.$138
- Sanara Medtech Inc.$102
- Johnson & Johnson$102
- plus $224 from 8 others
What the payments were for
- Travel & lodging$282%
- Food & beverage$1,48898%
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 |
|---|---|---|
| Zimmer Biomet | 5 | $400 |
| Atricure, Inc. | 22 | $312 |
| Edwards Lifesciences | 4 | $237 |
| Artivion, Inc. | 6 | $138 |
| Sanara Medtech Inc. | 1 | $102 |
| Johnson & Johnson | 1 | $102 |
| Abiomed | 1 | $68 |
| Convatec Inc. | 1 | $30 |
| Arthrex | 2 | $28 |
| Cvrx, Inc. | 1 | $27 |
| Medtronic | 1 | $26 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $19 |
| Boston Scientific | 1 | $13 |
| Cook Medical 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.
- STERNALOCK$104
- SternaLock Blu$104
- CellerateRx$102
- SURGIFLO Hemostatic Matrix$102
- EVARREST$102
How this compares
$1,516 in reported general payments places this provider in the 25th percentile of 115 thoracic surgery (cardiothoracic vascular surgery) providers in Tennessee.
See all thoracic surgery (cardiothoracic vascular surgery) 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 thoracic surgery (cardiothoracic vascular surgery) in Knoxville
- Christian ProbstKnoxville$25K
- Sean JordanKnoxville$8K
- Raymond DieterKnoxville$8K
- Christina GlennKnoxville$7K
- David GrahamKnoxville$6K
- Kimberly LindenKnoxville$6K
- William McAlexanderKnoxville$5K
- Carlo Martinez TorresKnoxville$5K
- William WalkerKnoxville$4K
- Grayson WheatleyNashville$900K
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.