Karthik Vamanan, MD
Vascular Surgery · Kansas City, MONPI 1033141635
Payments from drug & device makers
What this record shows
14 manufacturers reported payments, led by W. L. Gore & Associates, Inc. at 39.5% of the total. Reporting peaked in 2024 at $2,412 and has fallen 80.3% since, to $474 in 2025.
Across 60 payments — averaging $119.54 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- W. L. Gore & Associates, Inc.$3K
- Silk Road Medical, Inc.$1K
- Terumo Medical Corporation$1K
- Endologix LLC$819
- Abbott$357
- Biom'up France SAS$172
- plus $934 from 8 others
What the payments were for
- Travel & lodging$3,37747%
- Food & beverage$3,79653%
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 |
|---|---|---|
| W. L. Gore & Associates, Inc. | 28 | $2,835 |
| Silk Road Medical, Inc. | 7 | $1,035 |
| Terumo Medical Corporation | 6 | $1,020 |
| Endologix LLC | 5 | $819 |
| Abbott | 3 | $357 |
| Biom'up France SAS | 1 | $172 |
| Davol Inc. | 1 | $161 |
| Surmodics, Inc. | 1 | $157 |
| Medtronic(2 entities) | 2 | $151 |
| Saluda Medical Americas, Inc. | 1 | $136 |
| Siemens Medical Solutions USA, Inc. | 2 | $134 |
| KCI USA, Inc. | 1 | $102 |
| Integra Lifesciences Corporation | 1 | $67 |
| Acist Medical Systems, Inc. | 1 | $26 |
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.
- GORE EXCLUDER Thoracoabdominal Branch Endoprosthesis$1,749
- ENROUTE Transcarotid Neuroprotection System$947
- ENHANCE Transcarotid Peripheral Access Kit$947
- Navicross$919
- AZUR$919
- GlideWire$919
- ENROUTE Transcarotid Stent System$794
- ENROUTE 0.014 Guidewire$794
- EXCLUDER Conformable AAA Endoprosthesis with Active Control$236
- Alto Abdominal Stent Graft System$192
- HemoBlast Bellows$172
- Progel Applicator Spray Tips$161
- Epic$158
- Sublime 014 Rx PTA Balloon Dilatation Catheter$157
- Sublime Microcatheter, 018, 200cm, Straight$157
- Pounce Thrombectomy System$157
- Pounce Thrombectomy$157
- Pounce Venous Thrombectomy System$157
- JETI$156
- ENROUTE .014 Guidewire$153
How this compares
$7,172 in reported general payments places this provider in the 55th percentile of 92 vascular surgery providers in Missouri.
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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| XareltoRivaroxaban | 17 | $10,215 |
| ClopidogrelClopidogrel Bisulfate | 112 | $1,215 |
| Cilostazol | 40 | $905 |
| Enoxaparin Sodium | 12 | $505 |
| Atorvastatin Calcium | 58 | $358 |
| Rosuvastatin Calcium | 33 | $269 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 17 | $101 |
| Oxycodone Hcl | 12 | $96 |
Paid to pharmacies, not to this prescriber.
Other vascular surgery in Kansas City
- Robert CarterKansas City$48K
- Robert AndersonKansas City$23K
- Peter LauKansas City$23K
- Garrett TibbetsKansas City$7K
- Jamal MalikKansas City$4K
- Jeffrey JimSaint Louis$1.2M
- Karl StarkNorth Kansas City$223K
- Brian PetersonSaint Louis$216K
- Luis SanchezSaint Louis$178K
- Catherine WittgenSaint Louis$139K
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.