Physician profile
Martyn Knowles
NPI 1265632731
$311,228.00
in general payments reported to CMS, 2019-2025
29 companies · $90K in 2025
The $90K reported for 2025 was more than what 99% of Surgery providers received nationally (typical 2025 total: $281).
Payments by year
General and research payments by program year, as reported to CMS.
General payments by year: 2019: $25K · 2020: $20K · 2021: $17K · 2022: $27K · 2023: $72K · 2024: $61K · 2025: $90K.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program: $106K · Travel and Lodging: $96K · Honoraria: $9,200 · Food and Beverage: $6,945 · Consulting Fee: $4,125.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program | $106,283.48 |
| Travel and Lodging | $96,076.17 |
| Honoraria | $9,200.00 |
| Food and Beverage | $6,945.12 |
| Consulting Fee | $4,125.00 |
Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.
Who reported paying
General payments only, as reported to CMS. Research payments are listed separately below. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Penumbra, INC. | $220,205.13 | 2019-2025 | Indigo System, Penumbra System, Penumbra Coil 400 |
| Philips North America LLC | $45,207.85 | 2019-2023 | |
| W. L. Gore & Associates, INC. | $14,589.56 | 2019-2025 | Gore Tag Thoracic Endoprosthesis, Gore Excluder Thoracoabdominal Branch Endoprosthesis, Gore Excluder Iliac Branch Endoprosthesis |
| Contego Medical, INC | $8,381.24 | 2019-2025 | Excipio Sv |
| Medtronic, INC. | $8,319.34 | 2021-2024 | Abre, Endurant Iis |
| Medtronic Vascular, INC. | $6,246.84 | 2019-2020 | |
| Boston Scientific Corporation | $4,049.98 | 2022-2024 | Ranger |
| Cordis US Corp. | $1,500.00 | 2025 | Mynx Control Venous |
| Inari Medical, INC. | $735.92 | 2021-2022 | |
| Abbott Laboratories | $656.34 | 2019-2024 | Amplatzer Talisman, Amplatzer Amulet |
| Silk Road Medical, INC. | $276.77 | 2019-2021 | |
| Endologix LLC | $274.41 | 2022-2025 | Alto Abdominal Stent Graft System |
| Surmodics, INC. | $221.79 | 2024 | Sublime 014 Rx Pta Balloon Dilatation Catheter, Pounce Thrombectomy, Pounce Thrombectomy System |
| Heartflow, INC. | $109.37 | 2019 | |
| Edwards Lifesciences Corporation | $83.85 | 2024-2025 | Carpentier-Edwards Physio II Annuloplasty Ring |
Show all 29 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Cook Medical LLC | $75.25 | 2023 | Zilver Ptx, Zenith Spiral-Z |
| Medtronic USA, INC. | $52.96 | 2020 | |
| Angiodynamics, INC. | $43.32 | 2022 | |
| Smith+Nephew, INC. | $26.60 | 2024 | Acticoat 4" X 4", Pico |
| Shockwave Medical, INC | $26.26 | 2020 | |
| Astrazeneca Pharmaceuticals LP | $25.51 | 2020 | |
| Medistim USA, INC. | $19.34 | 2024 | Miraq |
| Amgen INC. | $18.94 | 2025 | Repatha |
| E.R. Squibb & Sons, L.L.C. | $18.67 | 2025 | Eliquis |
| Asahi Intecc USA, INC. | $16.72 | 2023 | Asahi Ptca Guide Wire |
| Bard Peripheral Vascular, INC. | $13.93 | 2020 | |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $13.86 | 2021 | |
| Abiomed | $12.23 | 2019 | |
| Lifenet Health | $6.02 | 2025 | Theragenesis Wound Matrix |
Drugs and devices associated with these payments
CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.
Research and ownership
$4,125.00 in research payments reported 2019-2025. Research payments are often institution-directed and tied to clinical trials: they are reported under a clinician's name but frequently go to a hospital or research organization, and usually reflect participation in medical research.
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw Martyn Knowles listed in the CMS Open Payments database. Can you tell me about your work with those companies?"
- "Is there a generic or alternative to this medication, and would it work as well for me?"
- "What made you choose this particular treatment for my situation?"
These are normal questions. A good clinician will welcome them.
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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.