Dr. Mark Feldman, MD

Dr. Mark Feldman, MD

Gastroenterology  |  
Male  |  
Age 66
Insurances AcceptedSave
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.

311 W Lincoln St Ste 100

Belleville, IL 62220

Contact Information

Insurance Accepted

  • Aetna
  • Anthem Blue Cross Blue Shield
  • Blue Cross Blue Shield
  • Cigna
  • Coventry Health Care
  • First Health (Coventry Health Care)
  • HealthLink
  • Humana
  • MultiPlan
  • UnitedHealthCare

*Please verify this information when scheduling an appointment.

Learn about Dr. Feldman

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Top Care Areas


See how frequently Dr. Feldman performs your care needs compared to other doctors.

Noninfectious Gastroenteritis and Colitis
very high
more than 99% of peers
Inflammatory Bowel Disease
very high
more than 99% of peers
Crohn's Disease
very high
more than 98% of peers

Dr. Feldman's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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  • Gastroenterology
  • Internal Medicine

Board Certifications

  • Gastroenterology
    Accredited by: American Board of Internal Medicine*
  • Internal Medicine
    Accredited by: American Board of Internal Medicine*

Conditions Treated

  • Abdominal Disorders
  • Abdominal Pain
  • Anal Prolapse
  • Anal or Rectal Pain
  • Anemia
  • Autoimmune Diseases
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Benign Tumor
  • Biliary Atresia
  • Cancer
  • Celiac Disease
  • Cholecystitis and Gallstones
  • Cirrhosis
  • Colorectal Cancer
  • Constipation
  • Crohn's Disease
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Ulcer
  • Duodenitis
  • 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
  • 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
  • Non-Neonatal Jaundice
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Peptic Ulcer
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Small Intestine Cancer
  • Stomach Cancer
  • Stomach Diseases
  • Stomach and Small Intestine Cancer
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Vascular Insufficiency of Intestines
  • Viral Enteritis
  • Viral Hepatitis
  • Viral Infection
  • Vomiting Disorders


Read More


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

Background Check

1 Malpractice Claim
  • Settlement : 11/26/2013
    Amount or Range: $1,000,000.00
    Nature of Complaint: SAINT CLAIR COUNTY, IL
0 Sanctions

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

0 Board Actions

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


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

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 profile.

Dr. Feldman's Reviews

Likelihood of recommending Dr. Feldman to family and friends
based on 22 total reviews (10 with comments)
Dr. Feldman's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    31 to 45 minutes
Patient Comments (10)
Waterloo, IL |
I had an endoscopy performed by Dr Feldman. While the procedure went well, his bedside manner leaves something to be desired. I literally met him moments before I was sedated and was greeted with a nod and gesture with the coffee cup in his hand. I had no problems with his staff, but did feel the wait time was excessive.When I went for my follow up, I waited an hour and a half and he MAYBE spent 2 minutes with me before telling me he didn't need to see me anymore, even though I don't feel healed
Troy, IL |
Colonoscopy procedure went very well. Would recommend to anyone. Long office wait.
I tried to make an appointment with Feldman's office and after mulitple calls to them and their promises that someone would call back and after three weeks I gave up and made an appointment with Dr. Pai in ten minutes. Something is definetly wrong with Feldman's office procedures and/or staff.
I'm so sorry that this happened to you but may I suggest in the future to speak with the office manager regarding your concerns so that it can be resolved immediately.
in Fairview Heights, IL |
I am very happy to have Dr. Feldman as my parents' doctor. He diagnosed my mom correctly and has being very helpful in her total recuperation. He has being kind enough to allow me to be with her given that she does not speak English. Yes, it is true that the wait time is horrible, but his caring and humble way of being erases all.
Thank you for your review. It helps when someone takes the time to say something good and not always negative when reviewing a physician.
in Waterloo |
I've been a patient of Dr. Feldman's for several years and I have always been treated right by Dr. Feldman and his staff!!! Even though I have a couple of health issues that he treats, my visits are kept to a minimum because he knows how to treat them so that I don't have a lot of trouble with them. If I do have a problem, he deals with it as quickly as possible and is always professional. I've seen people complaining about wait times, I've never had to wait two or more hours to see him!!!
Thank you for your review. It is a help when people take the time to review and say something good and not always negative.
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.
Thank you for your review. It really helps when people take the time to review a doctor that they feel is good and not just negative issues.
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.
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Now Accepting New Patients
Dr. Feldman accepts 10 insurance carriers
  • Aetna
    Aetna PPO
  • Anthem Blue Cross Blue Shield
    Anthem Blue Cross Blue Shield HMO
    Anthem Blue Cross Blue Shield PPO
    Blue Preferred Plus POS
    Blue Preferred Select
  • Blue Cross Blue Shield
    Blue Cross and Blue Shield
  • Cigna
    Cigna HMO
    Cigna PPO
    Open Access Plus
  • Coventry Health Care
    Advantra HMO
    Advantra PPO
    Coventry Health America PPO
  • First Health (Coventry Health Care)
    First Health (Coventry Health Care) PPO
  • HealthLink
    HealthLink POS
  • Humana
    Choice Care PPO
  • MultiPlan
    MultiPlan PPO
    PHCS Network PPO
  • UnitedHealthCare
    Navigate POS

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Feldman has admitting privileges

HSHS St. Elizabeth's Hospital
211 S 3rd St
Belleville, IL 62220
View Hospital Profile
Memorial Hospital Belleville
4500 Memorial Dr
Belleville, IL 62226
View Hospital Profile