Covered recipient · General Payments record
CHARLES W MCMAHON
Allopathic & Osteopathic Physicians Internal Medicine Gastroenterology
General Payments · PY2018–2024
$1,924.82
- Reported across 96 records
- CMS publication 2026-01-23
Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.
How these totals are calculated
- The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. Nothing is estimated, weighted, or combined across categories.
- General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
- Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
- Methodology & Data — sourcing, labeling, and limitations.
By nature of payment
PY2024 · sorted by reported total
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $768.74 | 38 |
| Education | $50.14 | 3 |
By paying entity
PY2024 · sorted by reported total
| Paying entity | Amount | Records |
|---|---|---|
| ABBVIE INC. | $291.91 | 16 |
| Ardelyx, Inc. | $138.13 | 5 |
| Celltrion USA Inc. | $66.05 | 4 |
| Daiichi Sankyo Inc. | $52.22 | 2 |
| Merck Sharp & Dohme Corporation | $41.22 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $36.33 | 2 |
| Celgene Corporation | $36.07 | 2 |
| GENZYME CORPORATION | $29.69 | 1 |
| Janssen Biotech, Inc. | $28.53 | 1 |
| AIMMUNE THERAPEUTICS, INC. | $25.44 | 1 |
| IRONWOOD PHARMACEUTICALS, INC | $20.91 | 1 |
| Organon LLC | $18.64 | 1 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $16.73 | 1 |
| Phathom Pharmaceuticals, Inc. | $13.51 | 1 |
| Micro-tech Endoscopy USA, Inc. | $3.50 | 1 |
By program year
All program years on this page · sorted by year
Payment records · PY2024 (41)
Sorted by paying entity, then date · as published by CMS
Source & provenance
- Dataset
- CMS Open Payments — General Payments
- Publisher of source data
- Centers for Medicare & Medicaid Services
- CMS publication date
- 2026-01-23
- Program years on this page
- 2018, 2021, 2022, 2023, 2024
- Generated from
- OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv
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