Gregory Fontana, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Thousand Oaks, CANPI 1508840570
Payments from drug & device makers
Across 1,571 payments — averaging $899.60 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$807K
- Abbott$591K
- Janssen Scientific Affairs, LLC$5K
- Edwards Lifesciences$4K
- Abiomed$2K
- Boston Scientific$1K
- plus $4K from 31 others
Across 18 payments — averaging $827.08 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.
- Medtronic$15K
What the payments were for
- Consulting fees$262,31630%
- Speaking & faculty fees$441,58850%
- Grants$5790%
- Travel & lodging$125,41714%
- Food & beverage$44,7355%
- Education$900%
- Other$2820%
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) | 942 | $806,670 |
| Abbott | 500 | $591,361 |
| Janssen Scientific Affairs, LLC | 3 | $5,075 |
| Edwards Lifesciences | 19 | $3,578 |
| Abiomed | 22 | $1,643 |
| Boston Scientific | 18 | $1,365 |
| Opsens Inc. | 1 | $600 |
| Amgen | 11 | $278 |
| Penumbra, Inc. | 1 | $235 |
| Biosense Webster, Inc. | 3 | $229 |
| Irhythm Technologies, Inc. | 9 | $224 |
| Atricure, Inc. | 3 | $219 |
| Siemens Medical Solutions USA, Inc. | 1 | $191 |
| Livanova USA, Inc. | 2 | $181 |
| Johnson & Johnson(3 entities) | 5 | $168 |
| Jenavalve Technology, Inc. | 1 | $166 |
| Cook Medical LLC | 1 | $115 |
| Corcym Inc | 1 | $109 |
| Angiodynamics, Inc. | 1 | $107 |
| Integra Lifesciences Corporation | 1 | $102 |
| Elutia, Inc. | 1 | $89 |
| Novartis | 4 | $81 |
| Braemar Manufacturing, LLC | 1 | $63 |
| Biotronik Inc. | 3 | $56 |
| Pfizer | 2 | $43 |
| Alnylam Pharmaceuticals Inc. | 2 | $40 |
| Impulse Dynamics (USA) Inc. | 1 | $38 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 2 | $36 |
| Heartflow, Inc. | 2 | $36 |
| Stryker | 1 | $28 |
| Lemaitre Vascular, Inc. | 1 | $23 |
| Aroa Biosurgery Incorporated | 1 | $23 |
| Biom'up SA | 1 | $22 |
| Baxter Healthcare | 1 | $21 |
| EKOS Corporation | 1 | $18 |
| Cordis US CORP. | 1 | $17 |
| Cardiva Medical, Inc. | 1 | $16 |
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.
- COREVALVE EVOLUT R$384,755
- CoreValve Evolut$144,574
- Portico Transcatheter Aortic HV$113,303
- PORTICO$86,253
- Portico Transcatheter Aortic Heart Valve$16,479
- VANTAGEVIEW$13,250
- Mitra Clip system$9,497
- RESOLUTE ONYX$7,145
- THORATEC HEARTMATE 3 LVAS IMPLANT KIT$6,380
- Trifecta GT Tissue Heart Valve$5,200
- AMPLATZER$3,116
- MitraClip$1,163
- Impella$1,046
- FlexAbility Ablation Catheter$650
- APOLLOTM$623
- OptoWire$600
- OptoMonitor$600
- ENSITE PRECISION$515
- Simulus$425
- MITRIS RESILIA Mitral Valve$410
How this compares
$1,413,264 in reported general payments places this provider in the 95th 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.
Other thoracic surgery (cardiothoracic vascular surgery) in Thousand Oaks
- Thomas FogartyPortola Valley$3.7M
- Steven GundryPalm Springs$1.6M
- Gansevoort DunningtonSaint Helena$963K
- Armin KiankhooySaint Helena$941K
- Ara KlijianMurrieta$916K
- Fernando FleischmanLos Angeles$901K
- Michael FischbeinPalo Alto$899K
- Jay LeeLos Angeles$856K
- William HiesingerPalo Alto$815K
- Vaughn StarnesLos Angeles$771K
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.