John Barnwell, MD
Surgical Oncology · Detroit, MINPI 1831105550
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (48.9%), food and beverage and education — rather than concentrated in one kind of arrangement. 13 manufacturers reported payments, led by Intuitive Surgical at 50.7% of the total. Among surgical oncology clinicians in MI with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 60 payments — averaging $120.40 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$4K
- Davol Inc.$2K
- Integra Lifesciences Corporation$511
- Johnson & Johnson$339
- Bard Peripheral Vascular, Inc.$199
- Aroa Biosurgery Incorporated$102
- plus $253 from 7 others
What the payments were for
- Travel & lodging$3,53649%
- Food & beverage$2,68837%
- Education$1,00014%
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 | 26 | $3,660 |
| Davol Inc. | 8 | $2,159 |
| Integra Lifesciences Corporation | 7 | $511 |
| Johnson & Johnson(3 entities) | 5 | $339 |
| Bard Peripheral Vascular, Inc. | 2 | $199 |
| Aroa Biosurgery Incorporated | 2 | $102 |
| Baxter Healthcare | 2 | $94 |
| Incyte Corporation | 2 | $47 |
| TELA Bio, Inc. | 2 | $32 |
| Medtronic | 1 | $28 |
| Convatec Inc. | 1 | $19 |
| Mimedx Group, Inc. | 1 | $19 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $15 |
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$3,215
- INTEGRA$901
- INTEGRA DERMAL REGENERATION TEMPLATE$300
- PRIMATRIX$300
- Tremfya$122
How this compares
$7,224 in reported general payments places this provider in the 90th percentile of 28 surgical oncology providers in Michigan.
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 surgical oncology in Detroit
- Rupen ShahDetroit$4K
- Lindsay PetersenDetroit$2K
- Paige AielloDetroit$823
- Steve KimDetroit$260
- Gitonga MuneneKalamazoo$82K
- Douglas IddingsFlint$7K
- Tong QuEast Lansing$7K
- Srinivas KavuturuEast Lansing$4K
- Elizabeth PaulusSaginaw$4K
- Sukamal SahaFlint$3K
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.