Michael Dohrenwend
Gastroenterology · Huntsville, ALNPI 1922089598
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (51.1%), speaking fees and gifts — rather than concentrated in one kind of arrangement. Salix Pharmaceuticals, A Division Of Bausch Health US, LLC accounts for 62.0% of it on its own, with 20 other manufacturers making up the rest. Reporting peaked in 2019 at $5,490 and has fallen 82.8% since, to $945 in 2022.
Across 265 payments — averaging $32.78 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$5K
- AbbVie$1K
- Gilead$510
- Braintree Laboratories, Inc.$400
- Intercept Pharmaceuticals, Inc.$325
- Ironwood Pharmaceuticals, Inc$220
- plus $783 from 15 others
Across 177 payments — averaging $274.76 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Novo Nordisk AS$36K
- Boehringer Ingelheim$10K
- Boehringer Ingelheim RCV GmbH & Co KG$3K
What the payments were for
- Speaking & faculty fees$4,00046%
- Food & beverage$4,43851%
- Education$90%
- Gifts$2403%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 134 | $5,384 |
| AbbVie(2 entities) | 47 | $1,064 |
| Gilead | 13 | $510 |
| Braintree Laboratories, Inc. | 13 | $400 |
| Intercept Pharmaceuticals, Inc. | 7 | $325 |
| Ironwood Pharmaceuticals, Inc | 12 | $220 |
| Johnson & Johnson(2 entities) | 8 | $142 |
| Takeda Pharmaceuticals U.S.A., Inc. | 6 | $127 |
| Ferring Pharmaceuticals Inc. | 6 | $112 |
| Redhill Biopharma Inc. | 4 | $96 |
| Merck | 3 | $58 |
| QOL Medical, LLC | 2 | $48 |
| Ardelyx, Inc. | 2 | $36 |
| Fujifilm Healthcare Americas Corporation | 1 | $35 |
| Pentax Of America, Inc. | 1 | $30 |
| Sanofi | 1 | $20 |
| Daiichi Sankyo Inc. | 1 | $19 |
| Medtronic | 1 | $18 |
| Alfasigma USA, Inc. | 1 | $17 |
| Zyla Life Sciences, Inc. | 1 | $13 |
| Pfizer | 1 | $13 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$8,687 in reported general payments places this provider in the 75th percentile of 225 gastroenterology providers in Alabama.
Other gastroenterology in Huntsville
- John-Paul VoelkelHuntsville$17K
- Meredith RoathHuntsville$16K
- Charles BillingsHuntsville$16K
- Dino FerranteHuntsville$15K
- Suresh KarneHuntsville$12K
- Rami HawariHuntsville$10K
- Prasad VankineniHuntsville$10K
- Eghierhua UgheokeHuntsville$10K
- Jason KinzelHuntsville$10K
- Keta VaidyaHuntsville$9K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.