Michael Zimmerman, MD
Gastroenterology · Las Vegas, NVNPI 1871601302
Payments from drug & device makers
Across 682 payments — averaging $1051.28 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ironwood Pharmaceuticals, Inc$398K
- AbbVie$213K
- Braintree Laboratories, Inc.$84K
- Phathom Pharmaceuticals, Inc.$14K
- Johnson & Johnson$2K
- Takeda Pharmaceuticals U.S.A., Inc.$983
- plus $5K from 29 others
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 |
|---|---|---|
| Ironwood Pharmaceuticals, Inc | 26 | $397,851 |
| AbbVie(2 entities) | 188 | $212,922 |
| Braintree Laboratories, Inc. | 27 | $84,319 |
| Phathom Pharmaceuticals, Inc. | 6 | $14,101 |
| Johnson & Johnson(2 entities) | 124 | $1,899 |
| Takeda Pharmaceuticals U.S.A., Inc. | 53 | $983 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 43 | $773 |
| Sanofi | 39 | $735 |
| Pfizer | 26 | $474 |
| Gilead | 16 | $384 |
| Merck | 22 | $350 |
| Bristol Myers Squibb | 25 | $324 |
| QOL Medical, LLC | 18 | $286 |
| Ferring Pharmaceuticals Inc. | 14 | $223 |
| Madrigal Pharmaceuticals | 2 | $182 |
| Redhill Biopharma Inc. | 7 | $136 |
| Aimmune Therapeutics, Inc. | 6 | $129 |
| Regeneron Healthcare Solutions, Inc. | 5 | $116 |
| Ardelyx, Inc. | 5 | $104 |
| Orphalan Inc | 3 | $99 |
| Intercept Pharmaceuticals, Inc. | 6 | $93 |
| Lilly USA, LLC | 3 | $81 |
| Intra-sana Laboratories | 1 | $57 |
| Organon | 2 | $46 |
| UCB, Inc. | 1 | $42 |
| Ipsen Biopharmaceuticals, Inc | 2 | $40 |
| Medtronic | 2 | $36 |
| Capsovision, Inc. | 2 | $36 |
| Novo Nordisk | 2 | $34 |
| Celltrion USA Inc. | 1 | $28 |
| Biocon Biologics Inc | 1 | $21 |
| Boehringer Ingelheim | 1 | $19 |
| Alfasigma USA, Inc. | 1 | $16 |
| Nestle Healthcare Nutrition Inc. | 1 | $16 |
| Shire North American Group Inc | 1 | $15 |
How this compares
$716,971 in reported general payments places this provider in the 95th percentile of 103 gastroenterology providers in Nevada.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other gastroenterology in Las Vegas
- Christian StoneLas Vegas$3.7M
- James HanLas Vegas$47K
- Tousif PashaLas Vegas$44K
- Filippo CremoniniLas Vegas$36K
- Vijay JayaramanLas Vegas$28K
- Gary ChenLas Vegas$27K
- David ShihLas Vegas$26K
- Noel FajardoLas Vegas$22K
- Frank FarisLas Vegas$14K
- Tarek AmmarLas Vegas$14K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.