Amer Alsamman, MD
Gastroenterology · Olympia Fields, ILNPI 1558701540
Payments from drug & device makers
Across 180 payments — averaging $66.43 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Olympus Corporation Of The Americas$5K
- Boston Scientific$3K
- Wilson Cook Medical Incorporated$1K
- Johnson & Johnson$456
- AbbVie$308
- Gilead$276
- plus $2K from 20 others
What the payments were for
- Travel & lodging$7,79365%
- Food & beverage$3,84432%
- Education$3213%
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 |
|---|---|---|
| Olympus Corporation Of The Americas | 50 | $4,561 |
| Boston Scientific | 18 | $3,320 |
| Wilson Cook Medical Incorporated | 3 | $1,044 |
| Johnson & Johnson | 16 | $456 |
| AbbVie | 23 | $308 |
| Gilead | 8 | $276 |
| Phathom Pharmaceuticals, Inc. | 5 | $243 |
| Pfizer | 10 | $222 |
| Takeda Pharmaceuticals U.S.A., Inc. | 8 | $194 |
| Cook Medical LLC | 4 | $191 |
| Mallinckrodt Hospital Products Inc. | 1 | $166 |
| Aimmune Therapeutics, Inc. | 9 | $163 |
| Janssen Scientific Affairs, LLC | 2 | $152 |
| Olympus America Inc. | 1 | $142 |
| Ardelyx, Inc. | 6 | $140 |
| Fujifilm Healthcare Americas Corporation | 1 | $85 |
| Madrigal Pharmaceuticals | 3 | $60 |
| Sanofi | 2 | $54 |
| Intercept Pharmaceuticals, Inc. | 3 | $48 |
| Argenx US, Inc. | 1 | $30 |
| Medtronic | 1 | $24 |
| Bristol Myers Squibb | 1 | $22 |
| Amgen | 1 | $20 |
| Teva Pharmaceuticals USA, Inc. | 1 | $19 |
| Novo Nordisk | 1 | $16 |
| Echosens North America, Inc. | 1 | $3 |
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.
- Single Use Electrosurgical Knife KD-655$3,278
- Olympus$2,668
- DISPOSABLE DISTAL ATTACHMENT$2,452
- Resolution 360 Clip$1,652
- FUSION$1,044
- VISIGLIDE$1,010
- Single Use Electrosurgical Hemostatic Forceps$684
- STELARA$249
- SINGLE USE SUCTION VALVE (Sterile)$216
- TERLIVAZ$166
- Hemospray$147
- AXIOS$145
- SPYGLASS$144
- DISPOSABLE EMR KIT$142
- Vemlidy$123
- Single Use Aspiration Needle NA-U200H$118
How this compares
$11,957 in reported general payments places this provider in the 80th percentile of 787 gastroenterology providers in Illinois.
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 |
|---|---|---|
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 61 | $815 |
| Omeprazole | 59 | $688 |
| Esomeprazole Magnesium | 16 | $581 |
| Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl | 19 | $316 |
| Pantoprazole Sodium | 38 | $314 |
| Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl | 13 | $202 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Olympia Fields
- Kamran AyubOak Lawn$4.3M
- David RubinChicago$3.6M
- Jonathan RosenbergGurnee$3.1M
- Stephen HanauerChicago$2.9M
- Parambir DulaiChicago$2.2M
- Charles BerkelhammerOak Lawn$1.9M
- Ikuo HiranoChicago$1.8M
- Manish BhuvaLake Barrington$1.7M
- Steven FlammChicago$1.6M
- Amar NaikDes Plaines$1.4M
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.