Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Mark Fedder, MD, PC

Organization Gastroenterology Physician · NPI 1184806101

Mark Fedder, MD, PC provides Gastroenterology Physician services in Maryville, Illinois. Licensed in Illinois. Registered with an NPI since 2007.

Licensed in
IL
In the registry since
2007
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

6810 State Route 162 Ste 211
Maryville, IL 62062-8501 Not confirmed with CMS for 18 years — call before visiting
Phone: (618) 288-0346
Fax: (618) 288-0349
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X (IL)

Record details

NPI number1184806101
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Fedder — Owner/President · (618) 288-0346
NPI enumeratedNovember 30, 2007
Last updated in NPPESNovember 30, 2007
Mailing address6810 State Route 162, Suite 211, Maryville, IL 62062-8501

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