Summary

Dr. Mark Fedder treats ulcerative colitis and performs home infusion therapy. He has practiced gastroenterology and internal medicine for 44 years and is affiliated with Anderson Hospital and Gateway Regional Medical Center. Dr. Fedder completed his residency at the University of Illinois College of Medicine and sees patients in Edwardsville and Maryville, Illinois. Patients on Vitals rate Dr. Fedder 4 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4
  • 44 years of experience
  • speaks English
  • University Of Illinois College Of Medicine
  • 15 written reviews
  • 2 specialties
  • 11 areas of expertise
  • 2 hospital affiliations
  • 4 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Mark Stephen Fedder has 4 locations

Anderson Surgery Center Llc

3403 Anderson Healthcare DrEdwardsville, IL 62025
Mon7:00 am - 3:30 pm
Tue7:00 am - 3:30 pm
Wed7:00 am - 3:30 pm
Thu7:00 am - 3:30 pm
Fri7:00 am - 3:30 pm
SatClosed
SunClosed

Fedder Mark S Office

6812 State Route 162 Ste 211Maryville, IL 62062
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 4:00 pm
SatClosed
SunClosed

Anderson Hospital

6800 State Route 162Maryville, IL 62062

Gateway Regional Medical Center

2100 Madison AveGranite City, IL 62040

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Dr. Mark Stephen Fedder, MD
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Dr. Mark Stephen Fedder, MDJan Seiler, APRNJi Soo Choi, APRNKristofer Langheinrich
GastroenterologyGastroenterologyGastroenterologyVascular & Interventional Radiology
Accepts New Patients Accepts New Patients Accepts New Patients
4 
0 
0 
0 
44 Years of Experience 12 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available No Virtual Visit Option
Speaks English Speaks English Speaks English
Edwardsville , ILMontgomery , ALSacramento , CAYUBA CITY , CA
Med School: University Of Illinois At Chicago College Of Medicine Med School: Georgia State University Med School: New York University Med School: University Of Louisville School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Mark Stephen Fedder

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Mark Stephen Fedder has the following 2 specialties

Specialty Expertise

Dr. Mark Stephen Fedder has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

44 Years Experience

Dr. Mark Stephen Fedder holds an expired medical license in the state of Illinois.

Medical License

Medical Doctor with an expired medical license in the state of Illinois that expired in 2026.

Education & Training

Residency

Completed their residency at University Of Illinois College Of Medicine.

Medical School

Graduated from University Of Illinois At Chicago College Of Medicine in 1982.

NPI Number

Dr. Fedder's NPI number is 1922009943.

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Frequently Asked Questions

Is Dr. Mark Fedder accepting new patients?
Dr. Mark Fedder is accepting new patients on Vitals. View Dr. Mark Fedder's profile on Vitals to make an appointment.
Does Dr. Mark Fedder accept virtual/telehealth appointments?
Dr. Mark Fedder has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Mark Fedder's office located?
Dr. Mark Fedder's office is located at 3403 Anderson Healthcare Dr, Edwardsville, IL, 62025.
How can I make an appointment with Dr. Mark Fedder?
You can find contact information for Dr. Mark Fedder here on Vitals.
What languages does Dr. Mark Fedder speak?
Dr. Mark Fedder speaks English.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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