Louis Zhang, MD
Vascular Surgery · Boise, IDNPI 1952843757
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (47.0%), travel and lodging and education — rather than concentrated in one kind of arrangement. W. L. Gore & Associates, Inc. accounts for 69.8% of it on its own, with 12 other manufacturers making up the rest. Reporting peaked in 2019 at $2,416 and has fallen 78.8% since, to $513 in 2025.
Across 67 payments — averaging $103.12 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- W. L. Gore & Associates, Inc.$5K
- Cook Medical LLC$676
- Silk Road Medical, Inc.$460
- Medtronic$355
- Zimmer Biomet$180
- Lemaitre Vascular, Inc.$133
- plus $281 from 7 others
What the payments were for
- Grants$67610%
- Travel & lodging$1,94328%
- Food & beverage$3,24947%
- Education$1,04115%
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. | 50 | $4,824 |
| Cook Medical LLC | 1 | $676 |
| Silk Road Medical, Inc. | 3 | $460 |
| Medtronic | 2 | $355 |
| Zimmer Biomet | 1 | $180 |
| Lemaitre Vascular, Inc. | 2 | $133 |
| Abbott | 1 | $77 |
| Integra Lifesciences Corporation | 2 | $63 |
| Baxter Healthcare | 1 | $43 |
| Inari Medical, Inc. | 1 | $30 |
| Solventum Corporation | 1 | $26 |
| Stryker | 1 | $23 |
| Terumo Medical Corporation | 1 | $20 |
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 TAG Thoracic Endoprosthesis$1,313
- EXCLUDER AAA Endoprosthesis$831
- ENROUTE Transcarotid Neuroprotection System$605
- GORE EXCLUDER Thoracoabdominal Branch Endoprosthesis$555
- ENROUTE Transcarotid Stent$460
- ENROUTE .014 Guidewire$316
- ENHANCE Transcarotid Peripheral Access Kit$316
- Vascular Graft$259
- GORE TAG Conformable Thoracic Endoprosthesis$233
- TAPESTRY$180
- EXCLUDER Conformable AAA Endoprosthesis with Active Control$149
- ENROUTE Enflate Transcarotid RX Balloon Dilatation Catheter$145
- Conformable TAG Thoracic Endoprosthesis$119
- RESTOREFLO$116
- TAG Thoracic Endoprosthesis$105
How this compares
$6,909 in reported general payments places this provider in the 85th percentile of 28 vascular surgery providers in Idaho.
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 |
|---|---|---|
| ClopidogrelClopidogrel Bisulfate | 12 | $160 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 19 | $111 |
Paid to pharmacies, not to this prescriber.
Other vascular surgery in Boise
- Kenneth MadsenBoise$11K
- Alexis GrahamBoise$6K
- Vikram PalkarBoise$6K
- Connie ZastrowBoise$5K
- Christine EdenBoise$3K
- Murtuza HabeebBoise$2K
- Graham DonaldBoise$2K
- Brian MattesonBoise$2K
- Christian Hamlat IiBoise$1K
- Jeffrey GilbertsonBoise$685
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.