Verlyn Nykamp, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Sioux Falls, SDNPI 1629075031
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 90.9% of the total across 39 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 15 manufacturers reported payments, led by ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) at 25.4% of the total. Reporting peaked in 2019 at $408 and has fallen 75.6% since, to $100 in 2023.
Across 39 payments — averaging $19.48 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)$193
- Abbott$117
- Seagen Inc.$100
- Davol Inc.$69
- Amgen$53
- United Therapeutics Corporation$36
- plus $192 from 9 others
What the payments were for
- Food & beverage$69191%
- Education$699%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 15 | $193 |
| Abbott | 1 | $117 |
| Seagen Inc. | 1 | $100 |
| Davol Inc. | 2 | $69 |
| Amgen | 3 | $53 |
| United Therapeutics Corporation | 2 | $36 |
| Amarin Pharma, Inc. | 3 | $36 |
| Actelion Pharmaceuticals US, Inc. | 3 | $35 |
| AstraZeneca | 2 | $25 |
| Sanofi-aventis U.S. LLC | 2 | $23 |
| Regeneron Healthcare Solutions, Inc. | 1 | $20 |
| Medtronic | 1 | $15 |
| Astellas Pharma US Inc | 1 | $15 |
| E.r. Squibb & Sons, L.L.C. | 1 | $13 |
| Johnson & Johnson | 1 | $12 |
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.
- CentriMag$117
How this compares
Too few thoracic surgery (cardiothoracic vascular surgery) providers in South Dakotato place this figure against a meaningful peer group, so we don't.
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 thoracic surgery (cardiothoracic vascular surgery) in Sioux Falls
- John GrehanSioux Falls$187K
- Keung UngSioux Falls$7K
- David MaziarzSioux Falls$3K
- Paul MeyerSioux Falls$3K
- Tommy ReynoldsSioux Falls$2K
- Brian DuxburySioux Falls$228
- Steven FeldhausSioux Falls$169
- Luyando KalemboSioux Falls$30
- Tommaso CambiaghiRapid City$34K
- Charan MungaraRapid City$10K
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.