Michael Koumjian, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · la Mesa, CANPI 1366403321
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (57.7%), speaking fees and travel and lodging — rather than concentrated in one kind of arrangement. 26 manufacturers reported payments, led by Medtronic at 40.1% of the total. Reporting peaked in 2022 at $10,738 and has fallen 80.0% since, to $2,145 in 2025.
Across 240 payments — averaging $116.06 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$11K
- Abbott$3K
- Cvrx, Inc.$2K
- Abiomed$2K
- Edwards Lifesciences$2K
- Johnson & Johnson$1K
- plus $7K from 20 others
What the payments were for
- Speaking & faculty fees$8,00029%
- Travel & lodging$3,79114%
- Food & beverage$16,06258%
- Education$20%
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) | 39 | $11,157 |
| Abbott | 29 | $3,357 |
| Cvrx, Inc. | 23 | $2,059 |
| Abiomed | 19 | $1,690 |
| Edwards Lifesciences | 23 | $1,618 |
| Johnson & Johnson(2 entities) | 29 | $1,333 |
| Elutia, Inc. | 7 | $1,161 |
| Atricure, Inc. | 19 | $1,075 |
| Medical Device Business Services, Inc. | 7 | $731 |
| AstraZeneca | 5 | $597 |
| W. L. Gore & Associates, Inc. | 7 | $505 |
| La Jolla Pharmaceutical Company | 4 | $461 |
| Artivion, Inc. | 5 | $416 |
| Biotronik Inc. | 8 | $373 |
| Acacia Pharma Inc | 2 | $245 |
| Livanova USA, Inc. | 2 | $228 |
| Shockwave Medical, Inc | 1 | $204 |
| Davol Inc. | 2 | $163 |
| United Therapeutics Corporation | 1 | $125 |
| E.r. Squibb & Sons, L.L.C. | 1 | $121 |
| Merck | 1 | $100 |
| On Target Laboratories, Inc | 1 | $37 |
| Bolton Medical Inc | 2 | $35 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $24 |
| Pfizer | 1 | $24 |
| Acera Surgical, 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.
- ENDURANT IIS$6,416
- Valiant Captivia$2,168
- Barostim Neo System$1,638
- Trifecta GT Tissue Heart Valve$1,247
- ECM Patch,Pouch$1,151
- Impella$1,111
- Mitra Clip system$1,072
- Echelon Flex$865
- Signia$830
- Edwards SAPIEN 3 Transcatheter Heart Valve$613
- Endurant$434
- GIAPREZA$378
- INSPIRIS RESILIA aortic valve$372
- ANDEXXA$355
- SYNERGY ABLATION SYSTEM$352
- PROLENE$300
- BYFAVO$245
- BARHEMSYS$245
- ON-X AORTIC HEART VALVE WITH CONFORM-X SEWING RING AND EXTENDED HOLDER$233
- ETHICON$224
How this compares
$27,855 in reported general payments places this provider in the 80th percentile of 546 thoracic surgery (cardiothoracic vascular surgery) providers in California.
See all thoracic surgery (cardiothoracic vascular surgery) providers in California →
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 |
|---|---|---|
| Enoxaparin Sodium | 15 | $767 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 13 | $45 |
Paid to pharmacies, not to this prescriber.
Other thoracic surgery (cardiothoracic vascular surgery) in la Mesa
- Thomas FogartyPortola Valley$3.7M
- Steven GundryPalm Springs$1.6M
- Armin KiankhooySaint Helena$941K
- Ara KlijianMurrieta$916K
- Gregory FontanaThousand Oaks$875K
- Gansevoort DunningtonSaint Helena$764K
- Wilson TsaiWalnut Creek$680K
- Fernando FleischmanLos Angeles$608K
- Harmik SoukiasianLos Angeles$577K
- Ali KhoynezhadLong Beach$476K
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.