Keung Ung, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Sioux Falls, SDNPI 1972640498
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (57.8%), travel and lodging and education — rather than concentrated in one kind of arrangement. 28 manufacturers reported payments, led by Atricure, Inc. at 39.5% of the total. Reporting peaked in 2021 at $1,707 and has fallen 68.6% since, to $535 in 2025.
Across 184 payments — averaging $37.00 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Atricure, Inc.$3K
- Abiomed$1K
- E.r. Squibb & Sons, L.L.C.$357
- Getinge USA Sales, LLC$351
- AstraZeneca$310
- Edwards Lifesciences$291
- plus $2K from 22 others
What the payments were for
- Travel & lodging$2,76041%
- Food & beverage$3,93658%
- Education$1122%
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 |
|---|---|---|
| Atricure, Inc. | 19 | $2,689 |
| Abiomed | 11 | $1,015 |
| E.r. Squibb & Sons, L.L.C. | 28 | $357 |
| Getinge USA Sales, LLC | 7 | $351 |
| AstraZeneca | 19 | $310 |
| Edwards Lifesciences | 11 | $291 |
| Artivion, Inc. | 3 | $248 |
| Amgen | 13 | $230 |
| Johnson & Johnson(2 entities) | 28 | $229 |
| Davol Inc. | 5 | $160 |
| Medtronic | 2 | $145 |
| Actelion Pharmaceuticals US, Inc. | 9 | $115 |
| Zimmer Biomet | 2 | $105 |
| La Jolla Pharmaceutical Company | 2 | $74 |
| Amarin Pharma, Inc. | 6 | $74 |
| United Therapeutics Corporation | 5 | $66 |
| Haemonetics Corporation | 1 | $65 |
| Bayer | 2 | $39 |
| BD | 1 | $34 |
| Smith+Nephew | 1 | $34 |
| Philips North America LLC | 1 | $28 |
| Chiesi USA, Inc. | 2 | $27 |
| LSI Solutions Inc | 1 | $26 |
| Abbott | 1 | $25 |
| Convatec Inc. | 1 | $24 |
| Pfizer | 1 | $23 |
| Daiichi Sankyo Inc. | 1 | $18 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $4 |
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.
- ATRICLIP LAA EXCLUSION SYSTEM$1,278
- EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX$1,166
- SYNERGY ABLATION SYSTEM$1,166
- ISOLATOR SURGICAL ABLATION SYSTEM$1,166
- DISSECTOR$1,166
- ATRICURE SYNERGY ABLATION SYSTEM$1,030
- Impella$660
- Vasoview Hemopro 2$218
- COREVALVE EVOLUT R$129
- ON-X AORTIC HEART VALVE WITH CONFORM-X SEWING RING AND EXTENDED HOLDER$119
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
- David MaziarzSioux Falls$3K
- Paul MeyerSioux Falls$3K
- Tommy ReynoldsSioux Falls$2K
- Verlyn NykampSioux Falls$760
- 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.