David Graham, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Knoxville, TNNPI 1962606822
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (41.6%), travel and lodging and education — rather than concentrated in one kind of arrangement. Intuitive Surgical accounts for 62.1% of it on its own, with 9 other manufacturers making up the rest. 2025 is the largest year on record at $2,311, 8.9 times the $259 reported in 2019.
Across 60 payments — averaging $107.49 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$4K
- Atricure, Inc.$1K
- Abiomed$293
- Getinge USA Sales, LLC$263
- Medtronic$208
- Conmed Corporation$151
- plus $485 from 4 others
What the payments were for
- Speaking & faculty fees$5008%
- Travel & lodging$2,50539%
- Food & beverage$2,68142%
- Education$75012%
- Gifts$140%
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 | 25 | $4,005 |
| Atricure, Inc. | 12 | $1,045 |
| Abiomed | 2 | $293 |
| Getinge USA Sales, LLC | 5 | $263 |
| Medtronic(2 entities) | 8 | $208 |
| Conmed Corporation | 2 | $151 |
| Johnson & Johnson | 3 | $142 |
| Zimmer Biomet | 1 | $141 |
| Galvanize Therapeutics, Inc | 1 | $103 |
| Boston Scientific | 1 | $100 |
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
$6,449 in reported general payments places this provider in the 60th 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
- Kimberly LindenKnoxville$6K
- William McAlexanderKnoxville$5K
- Carlo Martinez TorresKnoxville$5K
- William WalkerKnoxville$4K
- Grayson WheatleyNashville$900K
- V ReddyNashville$760K
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.