Ahsun Riaz, MD
Vascular & Interventional Radiology · Chicago, ILNPI 1255642047
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $78,513 of the $126,547 with a category attached, or 62.0%. Boston Scientific accounts for 95.0% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2023 at $60,841 and has fallen 76.8% since, to $14,127 in 2025. Among vascular & interventional radiology clinicians in IL 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 164 payments — averaging $771.63 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$120K
- Cook Incorporated$5K
- Biocompatibles, Inc.$1K
- Cook Medical LLC$353
- Penumbra, Inc.$157
- Bard Peripheral Vascular, Inc.$137
- plus $204 from 5 others
Across 4 payments — averaging $18,584 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.
- Boston Scientific$60K
- Merit Medical Systems Inc$14K
What the payments were for
- Consulting fees$37,15029%
- Speaking & faculty fees$78,51362%
- Travel & lodging$7,6386%
- Food & beverage$3,2463%
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 |
|---|---|---|
| Boston Scientific | 143 | $120,183 |
| Cook Incorporated | 2 | $4,500 |
| Biocompatibles, Inc. | 1 | $1,013 |
| Cook Medical LLC | 3 | $353 |
| Penumbra, Inc. | 3 | $157 |
| Bard Peripheral Vascular, Inc. | 1 | $137 |
| Terumo Medical Corporation | 3 | $62 |
| W. L. Gore & Associates, Inc. | 3 | $60 |
| Medtronic | 3 | $40 |
| Stryker | 1 | $22 |
| Argon Medical Devices, Inc. | 1 | $19 |
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.
- SpyGlass Discover$41,832
- SPYGLASS$13,680
- GENERAL - THERAPIES$6,750
- Cook$4,016
- AXIOS$1,189
- THERASPHERE-BIO$1,013
- OBSIDIO$471
- Fusion Quattro$168
- POD$126
How this compares
$126,547 in reported general payments places this provider in the 90th percentile of 197 vascular & interventional radiology providers in Illinois.
See all vascular & interventional radiology 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 & interventional radiology in Chicago
- Riad SalemChicago$2.3M
- Kush DesaiChicago$1M
- Robert LewandowskiChicago$954K
- Christopher MolvarChicago$850K
- Sreekumar MadasseryChicago$459K
- Bulent ArslanChicago$300K
- Sameer AnsariChicago$161K
- Ramona GuptaChicago$72K
- Scott ResnickChicago$38K
- Erica AlexanderChicago$32K
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.