John Um, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Omaha, NENPI 1134346745
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (38.2%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. 8 manufacturers reported payments, led by Abbott at 53.0% of the total. Reporting peaked in 2019 at $7,619 and has fallen 79.0% since, to $1,602 in 2025.
Across 102 payments — averaging $161.19 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$9K
- Medtronic$5K
- Abiomed$2K
- Edwards Lifesciences$610
- Bayer$125
- Livanova USA, Inc.$121
- plus $88 from 2 others
Across 66 payments — averaging $4343.56 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.
- Abbott$179K
- Transmedics, Inc.$108K
What the payments were for
- Consulting fees$5,20032%
- Travel & lodging$4,96030%
- Food & beverage$6,28138%
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 |
|---|---|---|
| Abbott | 51 | $8,716 |
| Medtronic | 22 | $5,089 |
| Abiomed | 19 | $1,693 |
| Edwards Lifesciences | 6 | $610 |
| Bayer | 1 | $125 |
| Livanova USA, Inc. | 1 | $121 |
| Johnson & Johnson | 1 | $71 |
| Bard Access Systems, Inc. | 1 | $17 |
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
$16,441 in reported general payments places this provider in the 75th percentile of 29 thoracic surgery (cardiothoracic vascular surgery) providers in Nebraska.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Nebraska →
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 Omaha
- Helenmari MerrittOmaha$287K
- John BatterOmaha$29K
- Kim DuncanOmaha$23K
- David BerkheimOmaha$20K
- Karin TrujilloOmaha$16K
- Anthony CastleberryOmaha$16K
- Thomas LangdonOmaha$14K
- Marian UrbanOmaha$10K
- Jill NohlOmaha$9K
- Rudy LacknerOmaha$8K
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.