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Emergency Medicine in O Fallon, Illinois

Data updated monthly · Last refresh September 2026

21 Emergency Medicine providers practice in O Fallon. Listings are drawn from federal public records and are not endorsements.

Emergency Medicine providers in O Fallon

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Ahmed Nadeem, DO
Ofallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Alex Mueller, MD
O Fallon, IL · No drug or device payments recorded (2025) · (618) 234-2120
Dr. Armand Miranda, D.O.
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Arthur Sippo, M.D.
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Brian Litland
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Candace Nall
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Dale Long, D.O
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Deborah Treacy, M.D.
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Faron Fox, M.D.
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Gregory Lawson
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Jae Yang, M.D.
O'fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Jason Jerome, PH.D., M.D.
O Fallon, IL · No drug or device payments recorded (2025) · (618) 234-2120
Dr. Jennifer Smith, MD
O Fallon, IL · No drug or device payments recorded (2025) · (618) 234-2120
Dr. Kathryn Clayton
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Kevin Corrigan
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Maria Galanos
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Maurice Dale
O Fallon, IL · No drug or device payments recorded (2025) · (618) 234-2120
Dr. Michael Vanantwerp, MD
O Fallon, IL · No drug or device payments recorded (2025) · (888) 577-6337
Dr. Salvador Chavez
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Scott Roustio, MD
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-0091
Dr. Vicky Hwang, MD
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368
Dr. Victor Sun
O Fallon, IL · No drug or device payments recorded (2025) · (618) 624-3368

Common questions

How many Emergency Medicine providers are in O Fallon, Illinois?

There are 21 Emergency Medicine providers with active NPI records practicing in O Fallon, according to federal NPPES data refreshed monthly.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in O Fallon Emergency Medicine across Illinois

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.