William Simpson, MD
Gastroenterology · Kalispell, MTNPI 1487655346
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,097 of the $1,591 with a category attached, or 69.0%. 12 manufacturers reported payments, led by Boston Scientific at 30.7% of the total. Reporting peaked in 2019 at $1,137 and has fallen 89.4% since, to $121 in 2025.
Across 66 payments — averaging $24.10 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$488
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$240
- AbbVie$234
- Gilead$180
- E.r. Squibb & Sons, L.L.C.$115
- Intercept Pharmaceuticals, Inc.$102
- plus $231 from 6 others
What the payments were for
- Travel & lodging$48831%
- Food & beverage$1,09769%
- Education$50%
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 |
|---|---|---|
| Boston Scientific | 2 | $488 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 14 | $240 |
| AbbVie | 15 | $234 |
| Gilead | 14 | $180 |
| E.r. Squibb & Sons, L.L.C. | 1 | $115 |
| Intercept Pharmaceuticals, Inc. | 5 | $102 |
| Takeda Pharmaceuticals U.S.A., Inc. | 5 | $80 |
| UCB, Inc. | 3 | $47 |
| Phathom Pharmaceuticals, Inc. | 3 | $39 |
| Pfizer | 2 | $28 |
| Ipsen Biopharmaceuticals, Inc | 1 | $24 |
| Johnson & Johnson | 1 | $14 |
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 POLYPECTOMY$488
- ZEPOSIA$115
How this compares
$1,591 in reported general payments places this provider in the 70th percentile of 34 gastroenterology providers in Montana.
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 |
|---|---|---|
| Humira(Cf) PenAdalimumab | 18 | $221,531 |
| XifaxanRifaximin | 25 | $79,279 |
| Pantoprazole Sodium | 758 | $7,094 |
| Budesonide DrBudesonide | 24 | $5,564 |
| Mesalamine ErMesalamine | 16 | $5,211 |
| Esomeprazole Magnesium | 70 | $2,290 |
| Colestipol Hcl | 28 | $1,567 |
| Budesonide EcBudesonide | 11 | $1,465 |
| Bethanechol Chloride | 29 | $1,303 |
| ConstuloseLactulose | 13 | $1,137 |
| Famotidine | 57 | $576 |
| Lactulose | 16 | $553 |
| Omeprazole | 48 | $544 |
| Spironolactone | 33 | $350 |
| Carvedilol | 50 | $187 |
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 |
|---|---|---|
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLCXifaxan | $240 | $79,27925 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 70th percentile of 34 gastroenterology providers in Montana.
Other gastroenterology in Kalispell
- Juergen MuellerKalispell$4K
- Philip JaffeKalispell$1K
- Ramon GenerosoKalispell$569
- Howard TiceKalispell$44
- Craig HarrisonKalispell$44
- Andrew HermanBozeman$7K
- Waring TribleBozeman$5K
- Michael LindnerBozeman$4K
- Scott CooperMissoula$3K
- Andrew GentryBozeman$3K
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.