Athanasios Tsiouris
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Meridian, MSNPI 1336370576
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (44.5%), food and beverage and speaking fees — rather than concentrated in one kind of arrangement. 12 manufacturers reported payments, led by Intuitive Surgical at 38.7% of the total. Reporting peaked in 2020 at $3,222 and has fallen 89.3% since, to $346 in 2025.
Across 73 payments — averaging $131.90 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$4K
- Abiomed$3K
- Medtronic$1K
- Abbott$1K
- Atricure, Inc.$461
- Livanova USA, Inc.$120
- plus $428 from 6 others
What the payments were for
- Speaking & faculty fees$1,80019%
- Travel & lodging$4,28645%
- Food & beverage$3,39135%
- Education$1522%
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 |
|---|---|---|
| Intuitive Surgical | 11 | $3,725 |
| Abiomed | 15 | $2,630 |
| Medtronic | 12 | $1,141 |
| Abbott | 14 | $1,122 |
| Atricure, Inc. | 13 | $461 |
| Livanova USA, Inc. | 1 | $120 |
| AstraZeneca | 1 | $88 |
| Kls-martin L.p. | 1 | $75 |
| Johnson & Johnson(2 entities) | 2 | $69 |
| BD | 1 | $68 |
| Corcym Inc | 1 | $66 |
| Getinge USA Sales, LLC | 1 | $62 |
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
$9,629 in reported general payments places this provider in the 75th percentile of 42 thoracic surgery (cardiothoracic vascular surgery) providers in Mississippi.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Mississippi →
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 Meridian
- Lacy McClainHattiesburg$97K
- Galen OhnmachtJackson$83K
- Pierre de DelvaJackson$71K
- Vishal SachdevTupelo$35K
- William SmithOcean Springs$34K
- David TaltonTupelo$23K
- William HorsleyColumbus$16K
- John CalhounJackson$12K
- Walter SurowiecGulfport$12K
- Evan GarnerTupelo$11K
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.