Charles Yohannan, MD
Hospitalist · Winfield, ILNPI 1124279864
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 53 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 24 manufacturers, the largest accounting for just 18.6% — the pattern of someone who eats at a lot of different presentations. Among hospitalist clinicians in IL with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 53 payments — averaging $107.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boehringer Ingelheim$1K
- AstraZeneca$935
- AbbVie$546
- Johnson & Johnson$509
- Axsome Therapeutics, Inc.$243
- Novartis$230
- plus $2K from 18 others
What the payments were for
- Food & beverage$5,695100%
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 |
|---|---|---|
| Boehringer Ingelheim | 9 | $1,058 |
| AstraZeneca(2 entities) | 8 | $935 |
| AbbVie | 5 | $546 |
| Johnson & Johnson | 5 | $509 |
| Axsome Therapeutics, Inc. | 2 | $243 |
| Novartis | 2 | $230 |
| Pfizer | 2 | $225 |
| Teva Pharmaceuticals USA, Inc. | 2 | $192 |
| Actelion Pharmaceuticals US, Inc. | 1 | $146 |
| La Jolla Pharmaceutical Company | 3 | $142 |
| Astellas Pharma US Inc | 1 | $138 |
| Bridgebio Pharma, Inc. | 1 | $138 |
| Vanda Pharmaceuticals Inc. | 1 | $124 |
| Amgen | 1 | $124 |
| Chiesi USA, Inc. | 1 | $118 |
| Novo Nordisk | 1 | $117 |
| Heron Therapeutics, Inc. | 1 | $115 |
| Exelixis Inc. | 1 | $105 |
| Radius Health, Inc. | 1 | $94 |
| Lexicon Pharmaceuticals, Inc. | 1 | $92 |
| Ferring Pharmaceuticals Inc. | 1 | $91 |
| E.r. Squibb & Sons, L.L.C. | 1 | $81 |
| Merck | 1 | $75 |
| Boston Scientific | 1 | $58 |
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
$5,695 in reported general payments places this provider in the 95th percentile of 1,328 hospitalist 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 |
|---|---|---|
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 12 | $83 |
Paid to pharmacies, not to this prescriber.
Other hospitalist in Winfield
- Evdoxia KyritsisWinfield$10K
- Jonathan JansenWinfield$4K
- Odulola OdusanyaLibertyville$544K
- Salih SamoChicago$251K
- Eric GluckChicago$80K
- Jorge Gomez AlarconLake Forest$72K
- Alvin ThomasChicago$28K
- Osman QaiyumMount Vernon$22K
- Wajahat HumayunMaywood$20K
- Gabriel DiazMaywood$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.