GlassScriptPhysician profile
Michael B Karren
NPI 1730419730
$426.79
in general payments reported to CMS, 2019-2025
4 companies · $235 in 2025
The $235 reported for 2025 was more than what 91% of Nurse Anesthetist, Certified Registered providers received nationally (typical 2025 total: $45.72).
See the full distribution for Nurse Anesthetist, Certified Registered
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2021: $27.40 · 2022: $69.42 · 2023: $43.03 · 2024: $51.92 · 2025: $235.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $299 · Education: $31.11.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $298.86 |
| Education | $31.11 |
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 |
|---|---|---|---|
| Pacira Pharmaceuticals Incorporated | $247.41 | 2022-2025 | Exparel, Iovera, Zilretta |
| Avanos Medical | $79.40 | 2021-2023 | On-Q* Pump and Accessories |
| Merck Sharp & Dohme LLC | $65.33 | 2021-2025 | Bridion |
| Conmed Corporation | $34.65 | 2025 | Conmed Suction Irrigation, Conmed Specimen Retrieval, Airseal |
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 Karren 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.