John Karwowski, MD
Vascular Surgery · Baltimore, MDNPI 1932123882
Payments from drug & device makers
What this record shows
12 manufacturers reported payments, led by Silk Road Medical, Inc. at 39.7% of the total. That places this record below the midpoint for vascular surgery clinicians in MD, where the typical reported total is $3,095.
Across 40 payments — averaging $77.39 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Silk Road Medical, Inc.$1K
- Livanova USA, Inc.$739
- Boston Scientific$311
- Baxter Healthcare$191
- Terumo Medical Corporation$160
- Abbott$149
- plus $316 from 6 others
Across 1 payment — averaging $2322.00 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- W. L. Gore & Associates, Inc.$2K
What the payments were for
- Travel & lodging$1,23940%
- Food & beverage$1,85760%
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 |
|---|---|---|
| Silk Road Medical, Inc. | 11 | $1,229 |
| Livanova USA, Inc. | 5 | $739 |
| Boston Scientific | 7 | $311 |
| Baxter Healthcare | 2 | $191 |
| Terumo Medical Corporation | 2 | $160 |
| Abbott | 2 | $149 |
| Johnson & Johnson | 5 | $108 |
| BD | 1 | $73 |
| Cook Medical LLC | 2 | $66 |
| Smith+Nephew | 1 | $24 |
| KCI USA, Inc. | 1 | $23 |
| Laminate Medical Technologies Inc. | 1 | $21 |
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
$3,095 in reported general payments places this provider in the 50th percentile of 104 vascular surgery providers in Maryland.
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 vascular surgery in Baltimore
- Caitlin HicksBaltimore$88K
- Shahab ToursavadkohiBaltimore$76K
- Frank CriadoBaltimore$52K
- Khanjan NagarshethBaltimore$33K
- Saurabh GuptaBaltimore$31K
- Paul LucasBaltimore$27K
- Brajesh LalBaltimore$25K
- Rishi KundiBaltimore$14K
- James BlackBaltimore$14K
- Christopher AbularrageBaltimore$13K
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.