Physician profile
William S Knapp
NPI 1548269053
$1,370.48
in general payments reported to CMS, 2019-2025
13 companies · none reported in 2025
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $621 · 2020: $493 · 2021: $17.40 · 2023: $224 · 2024: $14.44.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Travel and Lodging: $212 · Food and Beverage: $27.21.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Travel and Lodging | $211.55 |
| Food and Beverage | $27.21 |
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 |
|---|---|---|---|
| Janssen Pharmaceuticals, INC | $426.59 | 2019-2021 | |
| Biotronik INC. | $211.55 | 2023 | Acticor 7 Vr-T Dx, Plexa Promri |
| Abiomed | $146.42 | 2019 | |
| Amarin Pharma, INC. | $123.39 | 2019-2020 | |
| Sanofi-Aventis U.S. LLC | $115.93 | 2019-2020 | |
| Novartis Pharmaceuticals Corporation | $99.95 | 2019-2023 | |
| Amgen INC. | $66.69 | 2019-2020 | |
| E.R. Squibb & Sons, L.L.C. | $66.06 | 2019-2020 | |
| Nuwellis, INC. | $47.84 | 2019-2020 | |
| Boston Scientific Corporation | $25.76 | 2020 | |
| Abbvie INC. | $14.44 | 2024 | |
| Chiesi USA, INC. | $14.23 | 2019 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | $11.63 | 2019 |
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 Knapp 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.