Internal Medicine in O Fallon, MO
36 active Internal Medicine providers practice in O Fallon, Missouri according to the latest NPPES snapshot. Profiles include the NPI number, taxonomy code, license state, and practice address.
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| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1659067874 | Aaron Steimel | Individual | Internal Medicine Physician | O Fallon, MO |
| 1740857457 | Alan Steube | Individual | Internal Medicine Physician | O Fallon, MO |
| 1558309757 | Alexander Bollis | Individual | Cardiovascular Disease Physician | O Fallon, MO |
| 1245453844 | Amy Davis | Individual | Internal Medicine Physician | O Fallon, MO |
| 1053421065 | Brian Grus | Individual | Internal Medicine Physician | O Fallon, MO |
| 1649252461 | Chaudhary Khan | Individual | Gastroenterology Physician | O Fallon, MO |
| 1386372514 | Complete Infusion Solutions LLC | Organization | Internal Medicine Physician | O Fallon, MO |
| 1730561069 | Daniela Blum Morales | Individual | Internal Medicine Physician | O Fallon, MO |
| 1700995339 | David Janssen | Individual | Infectious Disease Physician | O Fallon, MO |
| 1013414317 | Digestive Consultants LLC | Organization | Gastroenterology Physician | O Fallon, MO |
| 1699865576 | Dr. Genova, LLC | Organization | Internal Medicine Physician | O Fallon, MO |
| 1396889960 | Dr. Genova, LLC | Organization | Internal Medicine Physician | O Fallon, MO |
| 1003952458 | Eldad Bialecki | Individual | Gastroenterology Physician | O Fallon, MO |
| 1497729826 | Gary Gray | Individual | Internal Medicine Physician | O Fallon, MO |
| 1689640609 | Geraldine Ryan | Individual | Internal Medicine Physician | O Fallon, MO |
| 1750377941 | Gregory Genova | Individual | Internal Medicine Physician | O Fallon, MO |
| 1487924288 | Internal Medicine at Winghaven, LLC | Organization | Internal Medicine Physician | O Fallon, MO |
| 1619100989 | Jamie Tueth | Individual | Internal Medicine Physician | O Fallon, MO |
| 1720252190 | Jessica Barks | Individual | Pulmonary Disease Physician | O Fallon, MO |
| 1629039714 | Jyotirmaya Nanda | Individual | Internal Medicine Physician | O Fallon, MO |
| 1417307505 | Kent Alexander Cassmeyer | Individual | Internal Medicine Physician | O Fallon, MO |
| 1023195351 | Kevin L. Threlkeld, M.D., LLC | Organization | Internal Medicine Physician | O Fallon, MO |
| 1902864986 | Kevin Weikart | Individual | Internal Medicine Physician | O Fallon, MO |
| 1689311011 | Kevin Yin | Individual | Internal Medicine Physician | O Fallon, MO |
| 1972721025 | Lakeview Medical Group Inc | Organization | Internal Medicine Physician | O Fallon, MO |
| 1578574372 | Matthew Meier | Individual | Internal Medicine Physician | O Fallon, MO |
| 1871893834 | Midwest Acute Care Consultants | Organization | Pulmonary Disease Physician | O Fallon, MO |
| 1245535459 | Midwest Acute Care Consultants, PC | Organization | Pulmonary Disease Physician | O Fallon, MO |
| 1477717080 | Milton Ochieng' | Individual | Gastroenterology Physician | O Fallon, MO |
| 1134164825 | Nadia Zia | Individual | Internal Medicine Physician | O Fallon, MO |
| 1639144785 | Naman Ghazal-Albar | Individual | Internal Medicine Physician | O Fallon, MO |
| 1790777225 | Nat Levy | Individual | Critical Care Medicine (Internal Medicine) Physician | O Fallon, MO |
| 1215068655 | Physician Groups Lc | Organization | Internal Medicine Physician | O Fallon, MO |
| 1790978757 | Physician Groups Lc | Organization | Gastroenterology Physician | O Fallon, MO |
| 1437110681 | Qaiser Jawaid | Individual | Gastroenterology Physician | O Fallon, MO |
| 1790057230 | Weikart Healthcare Group LLC | Organization | Internal Medicine Physician | O Fallon, MO |
Frequently asked questions
How many Internal Medicine providers are in O Fallon, MO?
The latest NPPES snapshot lists 36 active Internal Medicine providers with a practice address in O Fallon, Missouri.
How do I check a Internal Medicine provider's NPI in O Fallon?
Open a profile below to see the NPI number, taxonomy code, and practice address, then verify against the official NPPES registry — every profile links directly to the CMS record.
Source: CMS NPPES (public data). Snapshot 2026-07-10.