Dr. Mark S. Feldman, MD

New Patients

Dr. Mark S. Feldman, MD


Gastroenterology | Male

MARK S FELDMAN, M.D. 311 W Lincoln St Ste 100, Belleville, IL 62220 Get Directions
(618) 233-3661

Learn about this Doctor

Personal Bio

Dr. Mark Feldman has been practicing in Belleville, Illinois since 1982. He is board certified in Internal Medicine, Gastroenterology,...Read more

Dr. Feldman's Experience

Experience Match

See how Dr. Feldman's experience matches your preferences.


For the best healthcare for your needs, choose a doctor who specializes in your medical condition.

Board Certifications

Board certification indicates that a doctor is highly qualified in the medical field in which they practice.

Conditions Treated

Check to see that this provider treats your medical condition.

Procedures Performed

Check to see that this provider performs the procedure that you need.

Background Check

Check to see if your provider has any malpractices, board actions, or sanctions.


Learn more about where this provider went to medical school, residency, and more.

Languages Spoken

Check to see what languages this provider and/or staff speak.

Memberships & Professional Affiliations

View memberships and affiliations associated with this provider.

Visiting Dr. Feldman

Dr. Feldman accepts 10 insurance carriers

Affiliated Hospitals

Hospital Quality

Check out the quality of care at the 2 hospitals where Dr. Feldman has admitting privileges.

Hospital Quality Awards


Dr. Feldman's Reviews

Help millions of people find the right doctor. Share your experience today!
Likelihood of recommending Dr. Feldman to family and friends
based on 17 total surveys (5 with reviews)
Key Survey Insights
  • Trustworthiness
  • Helpfulness
  • Staff
  • Scheduling
Experience with Dr. Feldman
  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Spends appropriate amount of time with patients
Dr. Feldman's Office & Staff
  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)
    31 – 45 minutes (15)
Open Full Survey+
in Tilden |
Dr. Mark Feldman has been my Specialist for over twenty years. Thanks to him I am alive and well. I deal with Barrett's Esophagus a pre-cancer condition and he has had me on the right track since then. Those who complain about wait times. Get over it. He is one of few that will take the time for each patient to discuss and address the needs of his patients. He does not block off -15-20 minutes and rush you out the door. He is a blessing that has help me stay well and alive. I owe him a lot.
Belleville, IL |
I have one word for this doctor, RETIRE. I went for follow up appointment after a colonoscopy and he said he might have to go back in and take another look. WOW! He is dangerous and does not care about his patients. Go to St Louis to a real Doctor.
Sometimes when you have procedures, it is necessary for them to be repeated. I don't know you exact situation, however, Dr. Feldman would never put someone in danger by doing a procedure. He is a very caring doctor and is well respected in Belleville.
Belleville, IL |
Dr. Feldman is a good Doctor but the staff is very poor. Often do not return phone calls, if they return them at all. Wait time in waiting room is never less than 2 hours. I once waiting over 3 hours, only to find out (at my insistance) that the person I was waiting to see wasn't even there. It is apparent that the staff does not care about the patient's time or concerns.
I'm sorry that you had an issue with someone not returning your phone calls, however, I have never had this complaint about our office staff. In the future, I can only advise you to report this to the office manager so she can address the individual. In regards to your wait time and the office staff not caring about your time, the office staff has no control over the wait time. The doctor sets his schedule and the office staff can only move as fast as the doctor.
in Evansville il |
Dr Feldman misdiagnosed me with Crohn's disease and billed my insurance for over $100,000. I later found out he also told two other acquaintances that they had this condition as well. Be careful! He thinks everyone has crohns or is in cahoots with the drug companies!
I'm sorry that you feel that Dr. Feldman has misdiagnosed you with Crohn's Disease. If this was the case, you should have contacted our office and discuss it with him. I do not list Tonia Sellers as a patient here and my computers goes back to 1999 so I'm not sure if this is even a real review.
in Belleville, IL |
Waited over 2 hours with no explanation! Spent 10 min with Dr. Terrible customer service. Stop overbooking! Call patients to inform them of the long wait.
Have you seen Dr. Mark S. Feldman, MD?
Are you Dr. Feldman?
Respond to your reviews and manage your personalized profile today!
Post your response

Compare Dr. Feldman

Compare this Doctor

View other doctors with similar experience to find the right doctor for you.

View all 241 matches


  • Gastroenterology

Board Certifications

Why It Matters: Dr. Feldman's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Gastroenterology
  • Internal Medicine

Conditions Treated

  • Abdominal Disorders
  • Abdominal Pain
  • Anal or Rectal Pain
  • Anal Prolapse
  • Anemia
  • Autoimmune Diseases
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Benign Tumor
  • Biliary Atresia
  • Blood Disorders
  • Cancer
  • Cholecystitis and Gallstones
  • Cirrhosis
  • Colorectal Cancer
  • Constipation
  • Crohn's Disease
  • Dehydration
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Ulcer
  • Duodenitis
  • Dysentery
  • Dysphagia
  • Enteritis
  • Esophageal Achalasia and Cardiospasm
  • Esophageal Cancer
  • Esophageal Diseases
  • Esophageal Diverticulum
  • Esophageal Ulcer
  • Esophageal Varices
  • Esophagitis
  • Gallstones
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Diseases
  • Gastrointestinal Malabsorption
  • Gastrojejunal Ulcer
  • Gastroparesis
  • Heartburn
  • Hemochromatosis
  • Hemorrhoids
  • Hepatitis B - Immune Response
  • Hepatitis C
  • Hepatorenal Syndrome
  • Hernia
  • Ileus
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Lactose Intolerance
  • Liver Damage from Alcohol
  • Malnutrition
  • Nausea
  • Neoplasm of Gastrointestinal Tract
  • Non-Alcoholic Fatty Liver Disease
  • Noninfectious Gastroenteritis and Colitis
  • Non-Neonatal Jaundice
  • Pancreatitis
  • Peptic Ulcer
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Small Intestine Cancer
  • Stomach and Small Intestine Cancer
  • Stomach Cancer
  • Stomach Diseases
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Vascular Insufficiency of Intestines
  • Viral Hepatitis
  • Vomiting Disorders

Procedures Performed

  • Anoscopy
  • Bile Duct Procedure
  • Colonoscopy
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • ERCP (Endoscopic Retrograde Cholangiopancreatography)
  • Flexible Sigmoidoscopy
  • Gastroenterology Procedures
  • Hemorrhoid Banding
  • Liver Biopsy
  • Manometry

Background Check

  • 1
    Malpractice Claim

    Dr. Feldman has 1 malpractice claim

    More What is medical malpractice
    • Settlement  (11/26/2013)
    • Amount or Range: $1,000,000.00
    • Nature of Complaint: SAINT CLAIR COUNTY, IL
    • State: Illinois
  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions


  • Medical School
    University Of Missouri--Columbia School Of Medicine
  • Residency Hospital
    University of Illinois
  • Fellowship Hospital
    Northwestern Center Feinberg School of Medicine

Awards & Recognition

  • Awards & Honors

    Dr. Feldman has no awards or honors listed.

  • Media & Publications

    Dr. Feldman has no media or publications listed.

Languages Spoken

  • English

Memberships &
Professional Affiliations

Dr. Feldman does not have any memberships or affiliations listed. If you are Dr. Feldman and would like to add memberships or affiliations, please update your free profile.


Dr. Feldman's experience matches your search based on the following criteria:

  • Based on total number of patients treated over the last 12 months
  • Specializes in Gastroenterology
  • Board certified in Gastroenterology and Internal Medicine
  • Malpractice claims found
  • No sanctions found
  • No board actions found

Why Does Experience Matter?

Even specialists specialize. One orthopedic surgeon might do nothing but hip surgeries, while another does nothing but knees. If you want the best possible care, it’s critical to match your medical need with the doctor who truly specializes in treating it.


Patient Satisfaction Results for Dr. Feldman

Overall Patient Satisfaction Score

Dr. Feldman's Office & Staff

Ease of scheduling urgent appointments
Office environment, cleanliness, comfort, etc.
Staff friendliness and courteousness
Total wait time (waiting & exam rooms)
31 – 45 minutes

Experience with Dr. Feldman

Level of trust in provider's decisions
How well provider explains medical condition(s)
How well provider listens and answers questions
Spends appropriate amount of time with patients

Dr. Feldman says...

Dr. Mark Feldman has been practicing in Belleville, Illinois since 1982.  He is board certified in Internal Medicine, Gastroenterology, and Gastrointestinal Endoscopy.  He is also a member of the American College of Gastroenterology and the American Society of Gastrointestinal Endoscopy.  He has been on the teaching faculty at Southern Illinois University and St. Louis University.  He has lectured at the County Medical Society and given Educational Lectures locally and at surrounding community Medical Facilities.