GlassScriptPhysician profile
William S Mcmahon
NPI 1073558458
$15,013.58
in general payments reported to CMS, 2019-2025
12 companies · $1,634 in 2025
The $1,634 reported for 2025 was more than what 83% of Pediatric Cardiology providers received nationally (typical 2025 total: $146).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $1,232 · 2020: $39.61 · 2021: $850 · 2022: $4,452 · 2023: $1,706 · 2024: $5,101 · 2025: $1,634.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Consulting Fee: $4,770 · Travel and Lodging: $2,199 · Food and Beverage: $1,472.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Consulting Fee | $4,770.00 |
| Travel and Lodging | $2,199.14 |
| Food and Beverage | $1,471.51 |
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. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Edwards Lifesciences Corporation | $6,063.14 | 2022-2024 | Edwards Sapien 3 Transcatheter Heart Valve (Thv), The Edwards Sapien 3 Valve With Alterra Adaptive Prestent System |
| Medtronic, INC. | $5,027.21 | 2021-2025 | Harmony |
| W. L. Gore & Associates, INC. | $2,445.42 | 2019-2025 | Gore Cardioform Septal Occluder, Gore Cardioform Asd Occluder |
| Onocor, LLC | $1,000.00 | 2022 | |
| B. Braun Interventional Systems INC. | $185.39 | 2023 | Ono Retrieval Device |
| Biosense Webster, INC. | $82.16 | 2023-2024 | Carto 3 |
| Medtronic Vascular, INC. | $50.56 | 2019-2020 | |
| Sobi, INC | $41.96 | 2021-2023 | |
| Sanofi Pasteur INC. | $37.57 | 2023-2024 | |
| Abbott Laboratories | $33.35 | 2022 | |
| Canon Medical Systems USA, INC. | $30.61 | 2023 | Interventional Angiography System |
| Cardiva Medical, INC. | $16.21 | 2020 |
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.
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw William Mcmahon 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.