Dr. Mark Stephen Fedder MD?
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Dr. Mark Stephen Fedder MD, Gastroenterologist

Dr. Mark Stephen Fedder MD

Gastroenterologist | Gastroenterology

6810 State Route 162 Suite 211 Maryville IL, 62062



Dr. Mark Fedder is a gastroenterologist practicing in Maryville, IL. Dr. Fedder specializes in the digestive system and its diseases that affect the gastrointestinal tract, which include organs from the mouth to the anus as well as liver disorders. Gastroenterology includes conditions such as hepatitis, peptic ulcer disease, colitis, nutritional problems and irritable bowel syndrome. Dr. Fedder performs colonoscopy and endoscopy procedures and provides accurate and thorough care for patients suffering from digestive issues.

Education and Training

Univ of Il Coll of Med, Chicago Il 1982

University of Illinois College of Medicine 1982

Board Certification

Internal MedicineAmerican Board of Internal MedicineABIM- Gastroenterology

Provider Details

MaleEnglish 30 years of experience


  • Anemia
  • Diarrhea
  • Colon Polyps
  • Indigestion
  • Diverticulosis
  • Malnutrition
  • Pain


  • Univ Il Coll Of Med, Gastroenterology; Univ Il Coll Of Med, Internal Medicine  
  • University of Illinois College of Medicine at Chicago Program   

Dr. Mark Stephen Fedder MD's Practice location

Dr. Mark Fedder, MD

6810 State Route 162 Suite 211 -
Maryville, IL 62062
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New patients: 618-288-0346
Fax: 618-288-0349

Dr. Mark Stephen Fedder MD's reviews

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Patient Experience with Dr. Fedder


Based on 49 reviews

Dr. Mark Stephen Fedder MD has a rating of 4 out of 5 stars based on the reviews from 49 patients. FindaTopDoc has aggregated the experiences from real patients to help give you more insights and information on how to choose the best Gastroenterologist in your area. These reviews do not reflect a providers level of clinical care, but are a compilation of quality indicators such as bedside manner, wait time, staff friendliness, ease of appointment, and knowledge of conditions and treatments.

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Head west on IL 162 1.8 mi
Turn right onto North Bluff Road (IL 157) 292 ft
Turn left onto IL 162 2.5 mi
Go straight onto IL 162 4.4 mi
Continue straight onto Edwardsville Road (IL 162) 1709 ft
Make a slight right 171 ft
Go straight onto Nameoki Road (IL 203) 1176 ft
Turn left onto East 23rd Street 4881 ft
Turn left onto Washington Avenue 803 ft
Keep right at the fork onto Niedringhaus Avenue 557 ft
Turn left 275 ft
You have arrived at your destination, on the left



Head east on IL 162 1.1 mi
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Head east on IL 162 3393 ft
Turn right onto North Center Street (IL 159) 1.3 mi
Continue straight onto Maryville Road (IL 159) 2418 ft
Continue straight onto S Center St (IL 159) 1648 ft
Continue straight onto Vandalia Street (IL 159) 3.0 mi
Continue straight onto South Morrison Avenue (IL 159) 1.3 mi
Continue straight onto North Illinois Street (IL 159) 3.9 mi
Take the ramp on the right 1637 ft
Merge left onto I 64 1.7 mi
Take the ramp on the right 2097 ft
Keep left at the fork 267 ft
Turn left onto Highway 50 2.1 mi
Turn right onto South Lincoln Avenue 3967 ft
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