Zachary Wilseck, MD
Vascular & Interventional Radiology · Ann Arbor, MINPI 1023499878
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (47.8%), speaking fees and food and beverage — rather than concentrated in one kind of arrangement. Penumbra, Inc. accounts for 91.2% of it on its own, with 3 other manufacturers making up the rest. Reporting peaked in 2023 at $2,758 and has fallen 88.5% since, to $317 in 2025.
Across 33 payments — averaging $256.65 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Penumbra, Inc.$8K
- Medtronic$547
- Microvention, Inc.$101
- Stryker$94
Across 1 payment — averaging $6250.00 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.
- Medtronic$6K
What the payments were for
- Speaking & faculty fees$2,40028%
- Travel & lodging$4,04848%
- Food & beverage$2,02224%
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 |
|---|---|---|
| Penumbra, Inc. | 26 | $7,728 |
| Medtronic | 5 | $547 |
| Microvention, Inc. | 1 | $101 |
| Stryker | 1 | $94 |
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.
- Penumbra System$8,663
- Penumbra Jet 7$401
- Penumbra SMART Coil$401
- STENT$201
- KYPHON EXPRESS II KYPHOPAK TRAY$157
- RIST$145
- Penumbra Coil 400$136
- Pipeline$132
- WEB Aneurysm Embolization System$101
How this compares
$8,470 in reported general payments places this provider in the 80th percentile of 118 vascular & interventional radiology providers in Michigan.
See all vascular & interventional radiology 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 vascular & interventional radiology in Ann Arbor
- Minhajuddin KhajaAnn Arbor$91K
- Wael SaadAnn Arbor$87K
- Joseph GemmeteAnn Arbor$15K
- Jared ChristensenAnn Arbor$6K
- Hassan AnbariAnn Arbor$5K
- Daniel KirkpatrickAnn Arbor$4K
- Mamadou SanogoAnn Arbor$4K
- William SherkAnn Arbor$3K
- Shantanu WarhadpandeAnn Arbor$3K
- Amber LilesAnn Arbor$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.