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

Dr. Brian A Oneill, MD

Individual provider Family Medicine Physician · NPI 1669466066

Dr. Brian A Oneill, MD is a Family Medicine Physician in Belleville, Illinois. Licensed in Illinois. Registered with an NPI since 2005.

Licensed in
IL
In the registry since
2005
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

4600 Memorial Dr Ste 220
Belleville, IL 62226-5368
Phone: (618) 235-6191
Fax: (618) 235-6716
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036046574 (IL)

Record details

NPI number1669466066
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 31, 2005
Last updated in NPPESFebruary 25, 2021
Certification dateFebruary 25, 2021
Mailing address4600 Memorial Dr Ste 400, Belleville, IL 62226-5366

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