Ashley Williamson, MD
Vascular Surgery · Chicago, ILNPI 1548640386
Payments from drug & device makers
What this record shows
The money is spread across several categories — education (47.2%), travel and lodging and speaking fees — rather than concentrated in one kind of arrangement. Intuitive Surgical accounts for 86.1% of it on its own, with 12 other manufacturers making up the rest. 2025 is the largest year on record at $10,865, more than ten times the $139 reported in 2019.
Across 48 payments — averaging $406.90 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$17K
- W. L. Gore & Associates, Inc.$1K
- Medical Device Business Services, Inc.$305
- Baxter Healthcare$220
- BD$172
- Silk Road Medical, Inc.$166
- plus $839 from 7 others
What the payments were for
- Speaking & faculty fees$4,00020%
- Travel & lodging$4,02521%
- Food & beverage$2,29012%
- Education$9,21747%
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 | $16,823 |
| W. L. Gore & Associates, Inc. | 7 | $1,006 |
| Medical Device Business Services, Inc. | 1 | $305 |
| Baxter Healthcare | 2 | $220 |
| BD | 1 | $172 |
| Silk Road Medical, Inc. | 1 | $166 |
| Surmodics, Inc. | 2 | $159 |
| Stryker | 1 | $139 |
| Penumbra, Inc. | 1 | $134 |
| Boston Scientific | 1 | $131 |
| Medtronic | 3 | $125 |
| Cook Medical LLC | 2 | $116 |
| E.r. Squibb & Sons, L.L.C. | 1 | $34 |
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$16,227
- ENROUTE Transcarotid Neuroprotection System$333
- GORE-TEX Vascular Graft$312
- ENROUTE Transcarotid Stent$297
- PREVELEAK$197
- GORE EXCLUDER Iliac Branch Endoprosthesis$192
- RotarexS 6 F x 135 cm$172
- ENROUTE Enflate Transcarotid RX Balloon Dilatation Catheter$166
- GORE TAG Thoracic Branch Endoprosthesis$162
- Pounce Thrombectomy System$147
- Pounce Venous Thrombectomy System$147
- Pounce Thrombectomy$147
- 1588 HD 3 CHIP CAMERA$139
- GORE VIABAHN Endoprosthesis$135
- Indigo System$134
- GORE TAG Thoracic Endoprosthesis$112
- Cook$108
How this compares
$19,531 in reported general payments places this provider in the 80th percentile of 170 vascular surgery providers in Illinois.
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 Chicago
- Ross MilnerChicago$1.3M
- Trissa BabrowskiChicago$292K
- Heron RodriguezChicago$105K
- Mark EskandariChicago$51K
- Calvin ChaoChicago$39K
- Clayton BrinsterChicago$34K
- Neel MansukhaniChicago$28K
- Matthew ChiaChicago$25K
- Margaret ReillyChicago$23K
- Courtney FurloughChicago$23K
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.