Michael Zimmerman, MD
Gastroenterology · Las Vegas, NVNPI 1871601302
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 97.6% of the total across 613 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 35 manufacturers reported payments, led by AbbVie at 25.4% of the total. 2025 is the largest year on record at $2,654, 2.6 times the $1,020 reported in 2019.
Across 613 payments — averaging $18.43 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$3K
- Johnson & Johnson$2K
- Takeda Pharmaceuticals U.S.A., Inc.$983
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$773
- Sanofi$735
- Pfizer$474
- plus $4K from 29 others
Across 69 payments — averaging $10,227 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.
- Ironwood Pharmaceuticals, Inc$398K
- AbbVie$210K
- Braintree Laboratories, Inc.$84K
- Phathom Pharmaceuticals, Inc.$14K
What the payments were for
- Food & beverage$11,02698%
- Education$2342%
- Gifts$360%
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 |
|---|---|---|
| AbbVie | 144 | $2,872 |
| 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 |
| Braintree Laboratories, Inc. | 20 | $345 |
| Bristol Myers Squibb | 25 | $324 |
| QOL Medical, LLC | 18 | $286 |
| Ferring Pharmaceuticals Inc. | 14 | $223 |
| Ironwood Pharmaceuticals, Inc | 10 | $206 |
| 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 |
| Phathom Pharmaceuticals, Inc. | 4 | $96 |
| 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 |
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
$11,296 in reported general payments places this provider in the 85th 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| RinvoqUpadacitinib | 14 | $95,949 |
| Humira(Cf) PenAdalimumab | 13 | $88,550 |
| ClenpiqSod Picosulf/Mag Ox/Citric Ac | 173 | $29,712 |
| LinzessLinaclotide | 26 | $28,692 |
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 156 | $10,618 |
| Pantoprazole Sodium | 685 | $6,397 |
| SuflavePeg 3350/Sod Sulf,chlr/Pot/Mag | 47 | $5,732 |
| Dexlansoprazole DrDexlansoprazole | 21 | $4,172 |
| Esomeprazole Magnesium | 56 | $2,726 |
| Mesalamine | 19 | $1,945 |
| Lubiprostone | 11 | $1,348 |
| Omeprazole | 113 | $1,160 |
| Famotidine | 88 | $918 |
| Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl | 29 | $454 |
| Dicyclomine Hcl | 16 | $400 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieRinvoq, Linzess | $2,872 | $124,64140 claims |
| Ferring Pharmaceuticals Inc.Clenpiq | $223 | $29,712173 claims |
| Braintree Laboratories, Inc.Suflave | $345 | $5,73247 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 85th percentile of 103 gastroenterology providers in Nevada.
Other gastroenterology in Las Vegas
- Christian StoneLas Vegas$1.1M
- James HanLas Vegas$47K
- 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
- Eladio CarreraLas Vegas$13K
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.