Physician profile
John D Hammock
NPI 1912082975
$11,707.09
in general payments reported to CMS, 2019-2025
18 companies · $1,225 in 2025
The $1,225 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: 2019: $4,924 · 2020: $1,118 · 2021: $473 · 2022: $798 · 2023: $2,769 · 2024: $401 · 2025: $1,225.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $2,306 · Travel and Lodging: $2,088.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $2,306.48 |
| Travel and Lodging | $2,087.57 |
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 |
|---|---|---|---|
| Medical Device Business Services, INC. | $3,913.09 | 2019-2023 | Carto 3 |
| Medtronic Vascular, INC. | $2,566.90 | 2019-2020 | |
| Biosense Webster, INC. | $2,318.72 | 2019-2025 | Carto 3, Octaray Mapping Catheter, Qdot Micro Catheter |
| Medtronic, INC. | $1,454.52 | 2021-2023 | Evera Mri Xt Dr Surescan, Cobalt Dr Mri Surescan, Azure Xt Dr Mri Surescan |
| Abbott Laboratories | $659.06 | 2019-2025 | Amplatzer Amulet, Mitraclip, Jot Dx |
| Boston Scientific Corporation | $316.38 | 2022-2023 | Watchman Access System, Watchman Flx, Versacross Access Solution |
| Novartis Pharmaceuticals Corporation | $90.12 | 2019-2025 | |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $86.10 | 2019-2022 | |
| Philips North America LLC | $65.17 | 2019 | |
| Amgen INC. | $60.73 | 2019-2025 | Repatha |
| Abiomed | $51.42 | 2024 | Impella |
| E.R. Squibb & Sons, L.L.C. | $38.16 | 2022-2023 | |
| Heartflow, INC. | $24.63 | 2022 | |
| Inspire Medical Systems, INC. | $17.59 | 2025 | Inspire |
| Pfizer INC. | $15.12 | 2022 |
Show all 17 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Shockwave Medical, INC | $15.09 | 2025 | |
| Sanofi-Aventis U.S. LLC | $14.29 | 2024 |
1 company reported research payments only; those appear in the research section below.
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 John Hammock 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.