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Mark Fedder, MD

Dr. Fedder is a gastroenterologist in the Maryville area. He is affiliated with Anderson Hospital and Community Memorial Hospital.
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Conditions treated

Tap to see related services for each condition and more details about our calculations.

Top 25%
383 doctors
Top 15%
383 doctors
Top 5%
191 doctors
Dr. Fedder saw more digestive tract conditions patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
394 doctors
Top 15%
394 doctors
Top 5%
197 doctors
Dr. Fedder saw more vascular disease patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
54 doctors
Top 15%
54 doctors
Top 5%
26 doctors
Dr. Fedder saw more hemorrhoid patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
220 doctors
Top 15%
220 doctors
Top 5%
110 doctors
Dr. Fedder saw more peripheral vascular disease (PVD) patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
44 doctors
Top 15%
44 doctors
Top 5%
21 doctors
Dr. Fedder saw more diverticulosis patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
64 doctors
Top 15%
64 doctors
Top 5%
31 doctors
Dr. Fedder saw more benign polyps patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
35 doctors
Top 15%
36 doctors
Top 5%
17 doctors
Dr. Fedder saw more colon polyps patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
447 doctors
Top 15%
447 doctors
Top 5%
223 doctors
Dr. Fedder saw more pain patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
146 doctors
Top 15%
145 doctors
Top 5%
72 doctors
Dr. Fedder saw more hemorrhage patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
264 doctors
Top 15%
264 doctors
Top 5%
131 doctors
Dr. Fedder saw more anemia patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
179 doctors
Top 15%
178 doctors
Top 5%
89 doctors
Dr. Fedder saw more birth defects patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
184 doctors
Top 15%
183 doctors
Top 5%
91 doctors
Dr. Fedder saw more congenital disorders patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
28 doctors
Top 15%
29 doctors
Top 5%
14 doctors
Dr. Fedder saw more alcoholism patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
51 doctors
Top 15%
51 doctors
Top 5%
25 doctors
Dr. Fedder saw more malnutrition patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
149 doctors
Top 15%
148 doctors
Top 5%
74 doctors
Dr. Fedder saw more diarrhea patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
413 doctors
Top 15%
413 doctors
Top 5%
206 doctors
Dr. Fedder saw cardiovascular disease (CVD) patients in 2014–2018, but we couldn’t determine whether he was a top doctor for the condition in the Greater St. Louis area. Learn more.

Related services provided

Top 25%
46 doctors
Top 15%
47 doctors
Top 5%
23 doctors
Dr. Fedder saw more diverticulitis patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
160 doctors
Top 15%
160 doctors
Top 5%
80 doctors
Dr. Fedder saw more constipation patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
20 doctors
Top 15%
20 doctors
Top 5%
9 doctors
Dr. Fedder saw more indigestion patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
60 doctors
Top 15%
60 doctors
Top 5%
29 doctors
Dr. Fedder saw more irritable bowel syndrome (IBS) patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
39 doctors
Top 15%
39 doctors
Top 5%
19 doctors
Dr. Fedder saw more colon cancer patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
146 doctors
Top 15%
145 doctors
Top 5%
72 doctors
Dr. Fedder saw more inflammatory bowel disease (IBD) patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
110 doctors
Top 15%
109 doctors
Top 5%
54 doctors
Dr. Fedder saw more hernia patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
29 doctors
Top 15%
29 doctors
Top 5%
14 doctors
Dr. Fedder saw more hiatal hernia patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
248 doctors
Top 15%
248 doctors
Top 5%
124 doctors
Dr. Fedder saw more acid reflux patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
15 doctors
Top 15%
14 doctors
Top 5%
7 doctors
Dr. Fedder saw more stomach ulcer patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
48 doctors
Top 15%
47 doctors
Top 5%
23 doctors
Dr. Fedder saw more ulcerative colitis (UC) patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
16 doctors
Top 15%
16 doctors
Top 5%
8 doctors
Dr. Fedder saw anal polyp patients in 2014–2018, but we couldn’t determine whether he was a top doctor for the condition in the Greater St. Louis area. Learn more.

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Top 25%
159 doctors
Top 15%
158 doctors
Top 5%
79 doctors
Dr. Fedder saw more liver condition patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Top 25%
56 doctors
Top 15%
56 doctors
Top 5%
28 doctors
Dr. Fedder saw more gallstones patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

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Locations

Dr. Fedder sees patients and can be reached at the following locations.

Office
6812 State Route 162
Maryville, IL 62062
900 miles away
Anderson Hospital
6800 State Route 162
Maryville, IL 62062
900 miles away

Reviews

Credentials
  • University of Illinois College of Medicine
    MEDICAL EDUCATION, 1982
  • University of Illinois College of Medicine at Chicago Program
    RESIDENCY

Hospital affiliations

Dr. Fedder is able to admit and treat patients at the following hospitals.

  • Anderson Hospital
    B
    Hospital safety grade (Fall 2018)
  • Community Memorial Hospital
    Hospital safety grade not available

Insurance accepted

Always check coverage with your doctor’s office.

  • Aetna
  • Anthem
  • Arkansas Blue Cross and Blue Shield
  • Assurant Health
  • Blue Cross Blue Shield of Arizona
  • Blue Cross Blue Shield of Massachusetts
  • Blue Cross Blue Shield of Michigan
  • Blue Cross and Blue Shield of Alabama
  • Blue Cross and Blue Shield of Florida
  • Blue Cross and Blue Shield of Illinois
  • Blue Cross and Blue Shield of Kansas
  • Blue Cross and Blue Shield of Kansas City
  • Blue Cross and Blue Shield of Louisiana
  • Blue Cross and Blue Shield of Minnesota
  • Blue Cross and Blue Shield of Mississippi
  • Blue Cross and Blue Shield of Montana
  • Blue Cross and Blue Shield of Nebraska
  • Blue Cross and Blue Shield of New Mexico
  • Blue Cross and Blue Shield of North Dakota
  • Blue Cross and Blue Shield of Oklahoma
  • Blue Cross and Blue Shield of Rhode Island
  • Blue Cross and Blue Shield of Texas
  • Blue Cross and Blue Shield of Vermont
  • Blue Cross and Blue Shield of Wyoming
  • Blue Cross of Idaho
  • Blue Shield of California
  • BlueCross BlueShield of South Carolina
  • BlueCross BlueShield of Tennessee
  • CareFirst BlueCross BlueShield
  • Cigna
  • CommunityCare
  • CoreSource
  • Coventry Health Care
  • Cross and Blue Shield of North Carolina
  • HealthSCOPE Benefits
  • Highmark Blue Cross Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana
  • Independence Blue Cross AmeriHealth
  • Medicare
  • Meritain Health
  • Premera Blue Cross
  • Regence Blue Cross Blue Shield
  • United Healthcare
  • Wellmark Blue Cross and Blue Shield