Nikolaos Zacharias, MD
Vascular Surgery · Lebanon, NHNPI 1023251717
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (51.8%), food and beverage and education — rather than concentrated in one kind of arrangement. W. L. Gore & Associates, Inc. accounts for 61.6% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2023 at $1,312 and has fallen 94.7% since, to $69 in 2025. That places this record below the midpoint for vascular surgery clinicians in NH, where the typical reported total is $2,156.
Across 26 payments — averaging $89.14 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- W. L. Gore & Associates, Inc.$1K
- Boston Scientific$456
- Inari Medical, Inc.$235
- Silk Road Medical, Inc.$92
- Endologix LLC$61
- Johnson & Johnson$46
What the payments were for
- Travel & lodging$1,20052%
- Food & beverage$1,07246%
- Education$462%
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. | 11 | $1,427 |
| Boston Scientific | 10 | $456 |
| Inari Medical, Inc. | 1 | $235 |
| Silk Road Medical, Inc. | 2 | $92 |
| Endologix LLC | 1 | $61 |
| Johnson & Johnson | 1 | $46 |
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.
How this compares
$2,318 in reported general payments places this provider in the 50th percentile of 43 vascular surgery providers in New Hampshire.
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 Lebanon
- Bjoern SuckowLebanon$101K
- Mark FillingerLebanon$26K
- Matthew AlefLebanon$25K
- Richard PowellLebanon$19K
- David KuwayamaLebanon$11K
- Brian NolanLebanon$8K
- Jessica WallaertLebanon$5K
- Jocelyn BeachLebanon$4K
- Jennifer StablefordLebanon$3K
- Amy FelstedLebanon$2K
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.