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

Mark A. Harrison, MD

Individual provider Gastroenterology Physician · NPI 1831295666

Mark A. Harrison, MD is a Gastroenterology Physician in Springfield, 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

1025 S 6th St
Springfield, IL 62703-2403
Phone: (217) 528-7541
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 036-077012 (IL)

Record details

NPI number1831295666
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 16, 2006
Last updated in NPPESAugust 20, 2008
Mailing address1025 S 6th St, Springfield, IL 62703-2403

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