Chiwon Hahn, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Richmond, VANPI 1598784704
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 34 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 9 manufacturers reported payments, led by Medtronic at 34.6% of the total. That places this record below the midpoint for thoracic surgery (cardiothoracic vascular surgery) clinicians in VA, where the typical reported total is $3,688.
Across 34 payments — averaging $59.42 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$700
- Edwards Lifesciences$590
- Abbott$289
- W. L. Gore & Associates, Inc.$148
- Abiomed$111
- Philips North America LLC$92
- plus $91 from 3 others
Across 4 payments — averaging $3256.25 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.
- Artivion, Inc.$13K
What the payments were for
- Food & beverage$2,020100%
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 |
|---|---|---|
| Medtronic(2 entities) | 11 | $700 |
| Edwards Lifesciences | 14 | $590 |
| Abbott | 2 | $289 |
| W. L. Gore & Associates, Inc. | 1 | $148 |
| Abiomed | 1 | $111 |
| Philips North America LLC | 2 | $92 |
| Atricure, Inc. | 1 | $50 |
| Boston Scientific | 1 | $24 |
| Getinge USA Sales, LLC | 1 | $18 |
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
$2,020 in reported general payments places this provider in the 40th percentile of 109 thoracic surgery (cardiothoracic vascular surgery) providers in Virginia.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Virginia →
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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Metoprolol Tartrate | 56 | $388 |
| Amlodipine Besylate | 18 | $173 |
| Mupirocin | 28 | $135 |
| Losartan Potassium | 20 | $98 |
| Amoxicillin | 58 | $93 |
Paid to pharmacies, not to this prescriber.
Other thoracic surgery (cardiothoracic vascular surgery) in Richmond
- Jonathan KievRichmond$20K
- Jenalee CosterRichmond$16K
- Paul WehmanRichmond$13K
- Arturo CardounelRichmond$9K
- Rachit ShahRichmond$7K
- Luigi Lagazzi GarrosRichmond$6K
- Daniel MulloyRichmond$5K
- Vigneshwar KasirajanRichmond$5K
- Lauren TaylorRichmond$4K
- Motaz Al YafiRichmond$4K
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.