Physician profile
Michael Riordan
NPI 1629487343
$58,880.66
in general payments reported to CMS, 2019-2025
15 companies · $485 in 2025
The $485 reported for 2025 was less than what a typical Clinical Cardiac Electrophysiology provider received nationally (typical 2025 total: $2,477).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2020: $7,057 · 2021: $49K · 2022: $534 · 2023: $721 · 2024: $916 · 2025: $485.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $2,122.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $2,121.55 |
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 |
|---|---|---|---|
| Boston Scientific Corporation | $35,132.71 | 2020-2025 | General - Therapies, Watchman Access System, Watchman Flx |
| Abbott Laboratories | $18,584.44 | 2021-2022 | |
| Medtronic Vascular, INC. | $1,938.94 | 2020 | |
| Medtronic, INC. | $1,816.25 | 2021-2025 | Onyx Frontier, Micra, Azure Xt Dr Mri Surescan |
| Biosense Webster, INC. | $527.02 | 2022-2025 | Carto 3, Qdot Micro Catheter, Nuvision Ice Catheter |
| Biotronik INC. | $305.15 | 2020-2023 | |
| Elutia, INC. | $148.75 | 2021 | |
| Novartis Pharmaceuticals Corporation | $118.83 | 2024-2025 | |
| Astrazeneca Pharmaceuticals Lp | $98.05 | 2020 | |
| E.R. Squibb & Sons, L.L.C. | $73.92 | 2024-2025 | Eliquis |
| Pfizer INC. | $71.96 | 2023-2025 | |
| Siemens Medical Solutions USA, INC. | $20.44 | 2024 | Syngo Dynamics |
| Inspire Medical Systems, INC. | $19.11 | 2025 | Inspire |
| Kiniksa Pharmaceuticals, Ltd. | $17.50 | 2023 | Arcalyst |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $7.59 | 2025 | Lifevest |
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 Michael Riordan 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.