Siaka Yusuf, MD
Gastroenterology · East Lansing, MINPI 1619925146
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 32 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 8 manufacturers reported payments, led by AbbVie at 49.1% of the total. Reporting peaked in 2022 at $278 and has fallen 80.5% since, to $54 in 2025. That places this record below the midpoint for gastroenterology clinicians in MI, where the typical reported total is $1,620.
Across 32 payments — averaging $25.12 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$394
- Medtronic$170
- Boston Scientific$129
- Shionogi Inc$38
- QOL Medical, LLC$22
- Pfizer$20
- plus $30 from 2 others
What the payments were for
- Food & beverage$804100%
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 | 23 | $394 |
| Medtronic | 2 | $170 |
| Boston Scientific | 1 | $129 |
| Shionogi Inc | 2 | $38 |
| QOL Medical, LLC | 1 | $22 |
| Pfizer | 1 | $20 |
| Phathom Pharmaceuticals, Inc. | 1 | $16 |
| Nestle Healthcare Nutrition Inc. | 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.
- GI Genius$139
- EXALT Model D$129
How this compares
$804 in reported general payments places this provider in the 40th percentile of 497 gastroenterology providers in Michigan.
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 |
|---|---|---|
| StelaraUstekinumab | 19 | $525,081 |
| Humira(Cf) PenAdalimumab | 47 | $406,290 |
| SutabSod Sulf/Pot Chloride/Mag Sulf | 65 | $10,350 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 192 | $3,930 |
| Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl | 122 | $2,498 |
| Pantoprazole Sodium | 67 | $1,594 |
| Omeprazole | 44 | $947 |
| Peg 3350-ElectrolyteSodium Chloride/Nahco3/Kcl/Peg | 23 | $629 |
| Famotidine | 25 | $409 |
| Esomeprazole Magnesium | 13 | $348 |
| Ondansetron OdtOndansetron | 12 | $334 |
| Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl | 18 | $330 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in East Lansing
- Jannel Lee-AllenEast Lansing$46K
- Kimberly BrownDetroit$733K
- Dilip MoonkaDetroit$611K
- Philip SchoenfeldAnn Arbor$539K
- Michelle Muza-MoonsAnn Arbor$481K
- Partha NandiTroy$377K
- Bradford WhitmerSaint Clair Shores$206K
- Mohammed BarawiSt Clair Shores$193K
- Stuart GordonDetroit$178K
- Mohamad AlsibaeRoyal Oak$127K
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.