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

Mark Irwin, MD

Individual provider Internal Medicine Physician · NPI 1366433567

Mark Irwin, MD is an Internal 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.

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Practice location Address checks out

2900 Frank Scott Pkwy W Ste 904
Belleville, IL 62223-5000
Phone: (618) 234-0640
Fax: (314) 851-4475
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 336-023425 (IL)

Record details

NPI number1366433567
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 4, 2005
Last updated in NPPESSeptember 21, 2012
Mailing addressPo Box 23340, Saint Louis, MO 63156-3340

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