Tyler Aasen, DO
Gastroenterology · West Des Moines, IANPI 1740690205
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,493 of the $2,199 with a category attached, or 67.9%. 12 manufacturers reported payments, led by AbbVie at 59.7% of the total.
Across 30 payments — averaging $73.29 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$1K
- Gilead$215
- Intercept Pharmaceuticals, Inc.$204
- Regeneron Healthcare Solutions, Inc.$121
- Ardelyx, Inc.$112
- Phathom Pharmaceuticals, Inc.$110
- plus $125 from 6 others
What the payments were for
- Speaking & faculty fees$69832%
- Food & beverage$1,49368%
- Education$70%
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 | 14 | $1,312 |
| Gilead | 3 | $215 |
| Intercept Pharmaceuticals, Inc. | 2 | $204 |
| Regeneron Healthcare Solutions, Inc. | 1 | $121 |
| Ardelyx, Inc. | 2 | $112 |
| Phathom Pharmaceuticals, Inc. | 1 | $110 |
| Olympus America Inc. | 2 | $33 |
| Nestle Healthcare Nutrition Inc. | 1 | $25 |
| Merck | 1 | $22 |
| Medtronic | 1 | $16 |
| Sanofi | 1 | $15 |
| Otsuka America Pharmaceutical, Inc. | 1 | $13 |
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
$2,199 in reported general payments places this provider in the 75th percentile of 113 gastroenterology providers in Iowa.
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 |
|---|---|---|
| Mesalamine | 15 | $21,076 |
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 142 | $9,155 |
| Peg 3350-ElectrolyteSodium Chloride/Nahco3/Kcl/Peg | 146 | $2,912 |
| Pantoprazole Sodium | 258 | $2,087 |
| Lansoprazole | 16 | $1,216 |
| Omeprazole | 149 | $1,124 |
| Lubiprostone | 16 | $1,014 |
| CholestyramineCholestyramine (With Sugar) | 14 | $860 |
| Colestipol Hcl | 16 | $658 |
| Famotidine | 36 | $265 |
| Esomeprazole Magnesium | 12 | $244 |
| Gavilyte-NSodium Chloride/Nahco3/Kcl/Peg | 16 | $218 |
| Ondansetron OdtOndansetron | 11 | $146 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in West Des Moines
- Ramon ReyesWest Des Moines$2K
- Shawn HancockWest Des Moines$891
- Justin RiceWest Des Moines$598
- Amber TierneyWest Des Moines$482
- Laura DakovichWest Des Moines$477
- Nagendra MyneniClive$66K
- Ryan PerumpailBettendorf$62K
- Richard ManfreadyWaterloo$56K
- Maen MasadehIowa City$24K
- Mohammed IrshadClinton$18K
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.