Physician profile
Gregory M Knopf
NPI 1508837378
$7,163.44
in general payments reported to CMS, 2019-2025
28 companies · none reported in 2025
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $6,458 · 2020: $678 · 2021: $27.50.
Who reported paying
General payments only, as reported to CMS. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Pfizer INC. | $5,166.09 | 2019-2020 | |
| Astellas Pharma US INC | $321.26 | 2019-2020 | |
| Glaxosmithkline, LLC. | $210.42 | 2019-2020 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | $166.16 | 2019-2020 | |
| Allergan, INC. | $133.54 | 2019-2020 | |
| Novo Nordisk INC | $122.92 | 2019-2020 | |
| Amgen INC. | $101.46 | 2019-2020 | |
| Merck Sharp & Dohme LLC | $98.21 | 2019 | |
| Janssen Pharmaceuticals, INC | $97.46 | 2019-2020 | |
| E.R. Squibb & Sons, L.L.C. | $78.65 | 2019 | |
| Astrazeneca Pharmaceuticals LP | $76.22 | 2019-2020 | |
| Novartis Pharmaceuticals Corporation | $74.20 | 2019-2020 | |
| Lilly USA, LLC | $70.75 | 2019-2020 | |
| Takeda Pharmaceuticals U.S.A., INC. | $55.76 | 2019 | |
| Antares Pharma, INC. | $45.57 | 2019-2020 |
Show all 28 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Arbor Pharmaceuticals, INC. | $44.06 | 2019-2021 | |
| Teva Pharmaceuticals USA, INC. | $43.44 | 2019 | |
| Otsuka America Pharmaceutical, INC. | $40.74 | 2019 | |
| Sanofi Pasteur INC. | $37.70 | 2019-2020 | |
| Kowa Pharmaceuticals America, INC. | $35.42 | 2020 | |
| Jazz Pharmaceuticals INC. | $34.07 | 2019 | |
| Amarin Pharma, INC. | $20.55 | 2020 | |
| Philips North America LLC | $20.08 | 2019 | |
| Sanofi-Aventis U.S. LLC | $19.53 | 2019 | |
| Sunovion Pharmaceuticals INC. | $17.98 | 2019 | |
| Eisai INC. | $14.57 | 2020 | |
| Circassia INC. | $10.88 | 2019 | |
| Clarus Therapeutics INC. | $5.75 | 2021 |
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw Gregory Knopf 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.