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

Alan Hagen, MD

Individual provider Internal Medicine Physician · NPI 1114946175

Alan Hagen, MD is an Internal Medicine Physician in Collinsville, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
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

531 Vandalia St Fl 2
Collinsville, IL 62234-4061
Phone: (618) 343-0500
Fax: (618) 343-0530
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X (IL)

Record details

NPI number1114946175
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 19, 2006
Last updated in NPPESJuly 8, 2007
Mailing address531 Vandalia St Fl 2, Collinsville, IL 62234-4061

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