Thomas McMahon, MD
Gastroenterology · Portsmouth, RINPI 1619048030
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $646 of the $720 with a category attached, or 89.7%. 6 manufacturers reported payments, led by AbbVie at 52.0% of the total. That places this record below the midpoint for gastroenterology clinicians in RI, where the typical reported total is $2,112.
Across 34 payments — averaging $21.17 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$374
- Takeda Pharmaceuticals U.S.A., Inc.$150
- Johnson & Johnson$88
- Nestle Healthcare Nutrition Inc.$49
- Ironwood Pharmaceuticals, Inc$41
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$19
What the payments were for
- Food & beverage$64690%
- Education$7410%
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(2 entities) | 19 | $374 |
| Takeda Pharmaceuticals U.S.A., Inc. | 8 | $150 |
| Johnson & Johnson | 2 | $88 |
| Nestle Healthcare Nutrition Inc. | 2 | $49 |
| Ironwood Pharmaceuticals, Inc | 2 | $41 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $19 |
How this compares
$720 in reported general payments places this provider in the 35th percentile of 85 gastroenterology providers in Rhode Island.
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 Portsmouth
- Joseph PiankaPortsmouth$1K
- Robert BierwirthCranston$603K
- Thomas SepeProvidence$307K
- Morris ElevadoCranston$233K
- Joseph LowneyWarwick$127K
- Paul AkermanProvidence$123K
- Sean FineProvidence$55K
- Breton RousselProvidence$50K
- Alan EpsteinProvidence$36K
- Samir ShahProvidence$28K
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.