Charles Geringer, MD
Rheumatology · Olympia Fields, ILNPI 1235195702
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 99.1% of the total across 785 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 36 manufacturers, the largest accounting for just 22.5% — the pattern of someone who eats at a lot of different presentations.
Across 785 payments — averaging $24.00 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$4K
- Pfizer$3K
- AbbVie$3K
- Johnson & Johnson$1K
- Novartis$1K
- AstraZeneca$836
- plus $6K from 30 others
What the payments were for
- Food & beverage$18,67699%
- Education$1631%
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 |
|---|---|---|
| Amgen(2 entities) | 171 | $4,240 |
| Pfizer | 103 | $2,726 |
| AbbVie | 97 | $2,644 |
| Johnson & Johnson | 62 | $1,273 |
| Novartis | 43 | $1,053 |
| AstraZeneca(2 entities) | 27 | $836 |
| E.r. Squibb & Sons, L.L.C. | 40 | $800 |
| Boehringer Ingelheim | 27 | $665 |
| Lilly USA, LLC | 29 | $493 |
| Mallinckrodt Hospital Products Inc. | 14 | $455 |
| GSK | 21 | $428 |
| Actelion Pharmaceuticals US, Inc. | 11 | $388 |
| UCB, Inc. | 20 | $384 |
| Bristol Myers Squibb | 19 | $334 |
| ANI Pharmaceuticals, Inc. | 12 | $327 |
| Radius Health, Inc. | 7 | $264 |
| Kyowa Kirin, Inc. | 8 | $175 |
| Antares Pharma, Inc. | 8 | $145 |
| Fresenius Kabi USA, LLC | 7 | $138 |
| Mallinckrodt Enterprises LLC | 8 | $118 |
| Sanofi | 6 | $105 |
| Janssen Scientific Affairs, LLC | 1 | $100 |
| Sobi, Inc | 4 | $96 |
| Ultragenyx Pharmaceutical Inc. | 6 | $94 |
| Genentech USA, Inc. | 5 | $85 |
| Merck | 5 | $68 |
| Organon | 5 | $67 |
| Medexus Pharma, Inc. | 5 | $62 |
| Aurinia Pharma U.S., Inc. | 3 | $50 |
| Sandoz | 3 | $48 |
| Biocon Biologics Inc | 1 | $42 |
| Zyla Life Sciences, Inc. | 2 | $42 |
| Mylan Institutional Inc. | 1 | $35 |
| Kiniksa Pharmaceuticals, Ltd. | 2 | $24 |
| Celltrion USA Inc. | 1 | $17 |
| Kiniksa Pharmaceuticals International, PLC | 1 | $16 |
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
$18,839 in reported general payments places this provider in the 85th percentile of 287 rheumatology 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 |
|---|---|---|
| Humira(Cf) PenAdalimumab | 41 | $361,365 |
| Hydroxychloroquine Sulfate | 217 | $6,603 |
| Leflunomide | 79 | $4,813 |
| MethotrexateMethotrexate Sodium | 170 | $4,630 |
| Gabapentin | 98 | $1,920 |
| Azathioprine | 40 | $1,852 |
| Prednisone | 221 | $1,443 |
| Sulfasalazine DrSulfasalazine | 30 | $1,403 |
| Diclofenac Sodium | 90 | $1,314 |
| Sulfasalazine | 27 | $930 |
| Allopurinol | 66 | $814 |
| Mycophenolate Mofetil | 16 | $778 |
| Duloxetine Hcl | 38 | $770 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 23 | $757 |
| Febuxostat | 12 | $736 |
Paid to pharmacies, not to this prescriber.
Other rheumatology in Olympia Fields
- Veena NayakOlympia Fields$21K
- Manish JainChicago$1.9M
- Lori SiegelBannockburn$1.5M
- Alfonso BelloGlenview$611K
- Theodore PincusChicago$524K
- Angela CrowleyWillowbrook$483K
- Eric RudermanChicago$440K
- Anisha DuaChicago$280K
- Arthur MandelinChicago$270K
- Jeffrey HorvathSpringfield$246K
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.