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

Dr. Mark Stephen Fedder, MD

Individual provider Gastroenterology Physician · NPI 1922009943

Dr. Mark Stephen Fedder, MD is a Gastroenterology Physician in Maryville, Illinois. Works from 2 locations. Licensed in Illinois.

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

6810 State Route 162 Ste 211
Maryville, IL 62062-8501
Phone: (618) 288-0346
Fax: (618) 288-0349
Show map & directions

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

Additional practice locations (1)

  • 6812 State Route 162 Ste 204, Maryville, IL 62062-8562 — (618) 391-5070

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 036-067702 (IL)

Record details

NPI number1922009943
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 2, 2005
Last updated in NPPESDecember 29, 2020
Certification dateDecember 29, 2020
Mailing address6810 State Route 162, Suite 211, Maryville, IL 62062-8501

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