David Onsager
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Chicago, ILNPI 1396829156
Payments from drug & device makers
Across 39 payments — averaging $101.33 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Transmedics, Inc.$3K
- Abbott$491
- Atricure, Inc.$410
- Edwards Lifesciences$248
- Medtronic$168
- Abiomed$50
- plus $54 from 2 others
Across 5 payments — averaging $179.52 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.
- Transmedics, Inc.$898
What the payments were for
- Travel & lodging$2,69168%
- Food & beverage$1,23331%
- Gifts$271%
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 |
|---|---|---|
| Transmedics, Inc. | 1 | $2,529 |
| Abbott | 11 | $491 |
| Atricure, Inc. | 7 | $410 |
| Edwards Lifesciences | 9 | $248 |
| Medtronic | 8 | $168 |
| Abiomed | 1 | $50 |
| Pfizer | 1 | $27 |
| Nihon Kohden America, LLC | 1 | $27 |
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
$3,952 in reported general payments places this provider in the 45th percentile of 220 thoracic surgery (cardiothoracic vascular surgery) providers in Illinois.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Illinois →
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 Chicago
- S Christopher MalaisrieChicago$1.8M
- Douglas JohnstonChicago$1.3M
- Patrick McCarthyChicago$1.1M
- Duc PhamChicago$529K
- Valluvan JeevanandamChicago$366K
- Jessica DoningtonChicago$314K
- Samuel KimChicago$221K
- Christopher SalernoChicago$212K
- Gianluca TorregrossaChicago$197K
- Charles CampbellChicago$187K
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.