GlassScriptPhysician profile
John Thomas Mcmahan
NPI 1518910272
$438.22
in general payments reported to CMS, 2019-2025
9 companies · none reported in 2025
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $373 · 2020: $16.24 · 2022: $48.82.
Who reported paying
General payments only, as reported to CMS. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Stryker Corporation | $139.82 | 2019-2020 | |
| Astrazeneca Pharmaceuticals LP | $69.50 | 2019 | |
| Glaxosmithkline, LLC. | $52.25 | 2019-2022 | |
| Intersect Ent, INC. | $45.05 | 2019 | |
| Optinose US, INC. | $43.42 | 2019 | |
| Regeneron Healthcare Solutions, INC. | $28.18 | 2019 | |
| Medtronic, INC. | $24.99 | 2022 | |
| Mylan Specialty L.P. | $19.80 | 2019 | |
| Carestream Dental, LLC | $15.21 | 2019 |
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw John Mcmahan 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.