Michael Weaver, MD
Gastroenterology · Saint Louis, MONPI 1720427974
Payments from drug & device makers
What this record shows
This record is dominated by grants: $33,900 of the $37,847 with a category attached, or 89.6%. 28 manufacturers reported payments, led by Cook Medical LLC at 56.5% of the total. Reporting peaked in 2020 at $33,750 and has fallen 97.1% since, to $990 in 2025. Among gastroenterology clinicians in MO with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 233 payments — averaging $162.43 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Cook Medical LLC$21K
- Boston Scientific$13K
- AbbVie$1K
- Johnson & Johnson$597
- Takeda Pharmaceuticals U.S.A., Inc.$414
- Regeneron Healthcare Solutions, Inc.$362
- plus $1K from 22 others
What the payments were for
- Grants$33,90090%
- Food & beverage$3,80310%
- Education$1440%
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 |
|---|---|---|
| Cook Medical LLC | 2 | $21,400 |
| Boston Scientific | 2 | $12,586 |
| AbbVie | 93 | $1,263 |
| Johnson & Johnson | 32 | $597 |
| Takeda Pharmaceuticals U.S.A., Inc. | 22 | $414 |
| Regeneron Healthcare Solutions, Inc. | 18 | $362 |
| Sanofi | 10 | $195 |
| Ardelyx, Inc. | 7 | $150 |
| Braintree Laboratories, Inc. | 6 | $116 |
| QOL Medical, LLC | 6 | $104 |
| Intercept Pharmaceuticals, Inc. | 6 | $95 |
| Celltrion USA Inc. | 3 | $79 |
| Ferring Pharmaceuticals Inc. | 4 | $64 |
| Lilly USA, LLC | 3 | $55 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 3 | $53 |
| Madrigal Pharmaceuticals | 2 | $49 |
| Mirum Pharmaceuticals, Inc. | 2 | $38 |
| AMAG Pharmaceuticals, Inc. | 1 | $32 |
| Bristol Myers Squibb | 2 | $32 |
| Orphalan Inc | 1 | $28 |
| Ipsen Biopharmaceuticals, Inc | 1 | $22 |
| Merck | 1 | $20 |
| Nestle Healthcare Nutrition Inc. | 1 | $20 |
| Redhill Biopharma Inc. | 1 | $17 |
| Gilead | 1 | $17 |
| Phathom Pharmaceuticals, Inc. | 1 | $15 |
| Daiichi Sankyo Inc. | 1 | $12 |
| Ambu Inc. | 1 | $9 |
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.
- GENERAL - BILIARY DEVICES$12,500
How this compares
$37,847 in reported general payments places this provider in the 90th percentile of 374 gastroenterology providers in Missouri.
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 |
|---|---|---|
| Dexlansoprazole DrDexlansoprazole | 12 | $1,931 |
| Omeprazole | 109 | $1,507 |
| Lansoprazole | 11 | $218 |
| Sucralfate | 14 | $73 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Saint Louis
- Gregory SayukSaint Louis$1.1M
- Katie SchroederSaint Louis$730K
- David AlpersSaint Louis$616K
- Parakkal DeepakSaint Louis$205K
- Mauricio Lisker MelmanSaint Louis$179K
- Matthew CiorbaSaint Louis$156K
- Bruce BaconSaint Louis$138K
- Jeffrey CrippinSaint Louis$120K
- Vladimir KushnirSaint Louis$118K
- Kayci Huff-HardySaint Louis$116K
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.