Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Alex Nicholas Mueller, MD

Individual provider Emergency Medicine Physician · NPI 1235711938

Dr. Alex Nicholas Mueller, MD is an Emergency Medicine Physician in O Fallon, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2021
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1 Saint Elizabeth Blvd
O Fallon, IL 62269-1099
Phone: (618) 234-2120
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036.180166 (IL)

Record details

NPI number1235711938
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 22, 2021
Last updated in NPPESJuly 28, 2026
Certification dateJuly 28, 2026

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