The 20 Best Ulcerative Colitis Doctors Near Me in O Fallon, MO
Find the Top Ulcerative Colitis Experts and Specialists
SSM Health Medical Group
"Dr. Tariq is board certified in gastroenterology and internal medicine. His fellowship in gastroenterology and hepatology at Saint Louis University was completed in 2011. Prior to that he had earned board certification in geriatrics and spent over 10 years in the practice of geriatrics and internal medicine, which included patient care, research and teaching, and several directorships of geriatric programs in the St. Louis area. Dr. Tariq's fellowship in geriatrics was served at Saint Louis University, as was his internal medicine residency. ""My years in geriatric medicine were very rewarding. Now with this additional subspecialty, I look forward to helping adult patients of all ages with their gastrointestinal issues. I am excited to have partnered with Dr. Rodemann and SSM Health in this next chapter of my career.""- Syed Tariq, MD". Dr. Tariq is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 17 other conditions, according to our data. His clinical expertise encompasses Gastrointestinal Bleeding, Crohn's Disease, Familial Adenomatous Polyposis, Colonoscopy, and Endoscopy. Dr. Tariq is board certified in American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Medical Group
"Dr. Rodemann is board certified in gastroenterology and board certified in internal medicine. He completed a fellowship at the University of Pittsburgh's Division of Gastroenterology, Hepatology and Nutrition, where he was named chief fellow. Prior to that, Dr. Rodemann was a clinical instructor of medicine at Washington University in St. Louis, where he had completed his internal medicine residency. Dr. Rodemann earned his medical degree at Loyola University in Chicago. In addition to inflammatory bowel disease and screening colonoscopy, Dr. Rodemann's areas of interest include irritable bowel syndrome and biliary disease. His particular skills include esophagogastroduodenoscopy, with treatment of variceal and non-variceal bleeding; colonoscopy, with polypectomy and treatment of bleeding; video pill endoscopy; ERCP; PEG placement; and nasal endoscopy with placement of post-pyloric feeding tubes. He is on staff at SSM Health St. Joseph Hospital - Lake Saint Louis. ""I am drawn to gastroenterology because of the opportunity to treat a variety of diseases involving the GI tract, liver and pancreas. I am particularly interested in inflammatory bowel disease and the impact that screening colonoscopy has on preventing colon cancer. I am excited to bring my special training home to the St. Louis area and feel privileged to take care of patients in St. Charles County.""-Joseph Rodemann, MD". Dr. Rodemann is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 11 other conditions, according to our data. His clinical expertise encompasses Morning Sickness, Esophagitis, Painful Swallowing, Endoscopy, and Colonoscopy. Dr. Rodemann is board certified in American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Medical Group
Dr. Elizabeth Marsicano is a gastroenterologist who treats patients ages 18 and older. She specializes in treating gastroesophageal reflux disease (GERD); esophageal motility/swallowing issues; chronic constipation; chronic diarrhea; celiac disease; Barrett's esophagus; pelvic floor disorders; inflammatory bowel disease (IBD); metabolic liver disease; hepatitis B/C; hemochromatosis; autoimmune liver disease cirrhosis; and gastrointestinal diseases in pregnancy. She also performs colonoscopies and upper endoscopies. Dr. Marsicano aims to create a collaborative relationship with her patients to ensure optimal management of their gastrointestinal concerns through evidence-based practice, education, and mutual understanding. She works closely with her patients and their families to tailor a treatment plan that meets their specific needs and goals. Dr. Marsicano is a founding member of the Missouri Gastroenterology Society; a member of the American College of Gastroenterology; and a member of the American Neurogastroenterology and Motility Society. Fun fact: Dr. Marsicano enjoys traveling, yoga, and reading in her spare time. Dr. Marsicano is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Ascites, Diverticular Disease, Hemorrhoids, Endoscopy, and Gastrectomy. Dr. Marsicano is board certified in American Board Of Internal Medicine , American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Cardinal Glennon Pediatrics Specialty Services
Dr. Helen Pappa treats conditions of the digestive tract, liver and pancreas, including: abdominal pain; Barrett's esophagus; colitis; Crohn's disease; cirrhosis; colorectal cancer and disorders; diabetes; diverticulitis and diverticulosis; gallbladder diseases; hernias; and gastrointestinal disease. Dr. Pappa uses evidence-based medicine in her treatment of patients. Her research interests include improving care for patients with inflammatory bowel disease (IBD), and growth and bone health in patients with IBD. Dr. Pappa is an associate professor in the Department of Pediatrics, Division of Gastroenterology, at Saint Louis University School of Medicine. She also holds a master's degree in public health from Harvard. She is a member of the American Gastroenterological Association, the Crohn's and Colitis Foundation (CCF), and the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition. She is on the pediatric advisory committee of the CCF. Dr. Pappa is the parent of a disabled child and is an advocate for children with disabilities. Dr. Pappa is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. Her clinical expertise encompasses Viral Gastroenteritis, Crohn's Disease, Malnutrition, and Ulcerative Colitis. Dr. Pappa is board certified in American Board Of Pediatrics , American Board Of Pediatrics/Gastroenterology , Drug Enforcement Administration , Illinois Department Of Financial & Professional Regulation , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
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Alison Ball is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Ball is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. Her clinical expertise encompasses Ulcerative Colitis, Primary Orthostatic Tremor, Sitosterolemia, and Familial Hypertriglyceridemia.
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David Lotsoff is a Gastroenterologist practicing medicine in O Fallon, Missouri. Dr. Lotsoff is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 4 other conditions, according to our data. His clinical expertise encompasses Lower Esophageal Ring, Benign Esophageal Stricture, Painful Swallowing, Gastrectomy, and Gastrostomy.
Premier Infectious Disease Consultants-O'Fallon
Qaiser Jawaid is a Gastroenterologist practicing medicine in O Fallon, Missouri. Dr. Jawaid is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Choledocholithiasis, Diverticular Disease, Menetrier Disease, Endoscopy, and Gastrectomy.
Premier Infectious Disease Consultants-O'Fallon
Milton Ochieng is an Internal Medicine provider practicing medicine in O Fallon, Missouri. Dr. Ochieng is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Angiodysplasia of the Colon, Benign Esophageal Stricture, Lower Esophageal Ring, Gastrectomy, and Endoscopy.
SSM Health Cardinal Glennon Pediatrics Specialty Services
Dr. David Simon is a pediatric gastroenterologist who treats patients from birth to 18 years old. He specializes in treating pediatric inflammatory bowel diseases (IBD) such as Crohn's disease and ulcerative colitis, as well as performing gastrointestinal endoscopy, and general gastroenterology and hepatology services. Dr. Simon aims to provide the most up-to-date gastrointestinal care while forming close, therapeutic relationships with his patients and their families. His research interests include very early onset inflammatory bowel disease (VEO-IBD) and the developmental origins of IBD, including the impact of alterations in the gut microbiome. Dr. Simon is an assistant professor with the Division of Pediatric Gastroenterology in the Department of Pediatrics at Saint Louis University School of Medicine. He is a member of the American Academy of Pediatrics, and the North American Society of Pediatric Gastroenterology, Hepatology and Nutrition. Fun fact: Dr. Simon enjoys traveling the U.S. in search of the best barbecue. Dr. Simon is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His clinical expertise encompasses Viral Gastroenteritis, Endoscopy, and Ulcerative Colitis. Dr. Simon is board certified in American Board Of Pediatrics , Drug Enforcement Administration , Illinois Department Of Financial & Professional Regulation , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
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Beth Zimmer is a primary care provider, practicing in Family Medicine in O Fallon, Missouri. Dr. Zimmer is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. Her clinical expertise encompasses Ulcerative Colitis, Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, and Hypertension.
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Michael Zerega is an Internal Medicine provider practicing medicine in Lake Saint Louis, Missouri. Dr. Zerega is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 16 other conditions, according to our data. His clinical expertise encompasses Collagenous Colitis, Colitis, Hemorrhoids, Gastrectomy, and Gastrostomy.
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Michael Cleary is a Gastroenterologist practicing medicine in Lake Saint Louis, Missouri. Dr. Cleary is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Gardner Syndrome, Turcot Syndrome, Crohn's Disease, Gastrectomy, and Endoscopy.
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James Petersen is a Gastroenterologist practicing medicine in Lake Saint Louis, Missouri. Dr. Petersen is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His clinical expertise encompasses Esophagitis, Familial Adenomatous Polyposis, Viral Gastroenteritis, and Colitis.
BJC Medical Group At St Peters
Mei Huang is a Gastroenterologist practicing medicine in Saint Peters, Missouri. Dr. Huang is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Diverticular Disease, Familial Adenomatous Polyposis, Esophagitis, Colonoscopy, and Gastrectomy.
SSM Health Medical Group
Dr. Y.A. Ghouri is a gastroenterologist who treats patients ages 18 and older. His specialties include inflammatory bowel disease (IBD), endoscopic therapy, irritable bowel syndrome (IBS), and the gut microbiome. He also diagnoses and treats various gastrointestinal conditions such as ulcers, constipation, nausea, ulcerative colitis (UC), noninfectious gastroenteritis, and Crohn's disease. Dr. Ghouri is renowned for providing quality, compassionate medical care to his patients, which is further highlighted by his friendly bedside manner, attention-to-detail, responsiveness, and patience. He takes his time, listening to his patients and then explaining the appropriate treatment recommendations, which are tailored to their specific needs. He works to ensure a patient's gastrointestinal condition doesn't completely take over or disrupt his or her daily activities. An expert in gastroenterology, Dr. Ghouri has been widely published in various medical journals on topics such as IBD, IBS, UC, GI tumors, and Crohn's disease. Dr. Ghouri is rated as an Advanced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Gastrointestinal Bleeding, Crohn's Disease, Familial Colorectal Cancer, Endoscopy, and Colonoscopy. Dr. Ghouri is board certified in American Board Of Internal Medicine , American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
Wound Care & Hyperbarics At SSM Health St. Joseph Hospital - St. Charles
"Dr. McCollister is board certified in general surgery. He received his medical degree from the University of Missouri - Columbia and completed his residency and fellowship in surgical endoscopy training at Mt. Sinai Medical Center in Cleveland, Ohio. Dr. McCollister started the ""Hey! Where's Your Helmet?"" campaign to help educate people of all ages about the importance of wearing a helmet when cycling, rollerblading, etc. In addition to his involvement in safety awareness, Dr. McCollister takes a special interest in endoscopic procedures.". Dr. Mccollister is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Osteomyelitis, Osteomyelitis in Children, Cholecystitis, Gastrostomy, and Hernia Surgery. Dr. Mccollister is board certified in American Board Of Surgery , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Medical Group
Dr. Marcu is board certified in gastroenterology as well as in internal medicine. He earned his medical degree from University of Medicine and Pharmacy - Bucharest and Carol Davila School of Medicine in Romania. Dr. Marcu received his residency training at Saint Louis University Hospital, where he also completed his gastroenterology fellowship. He has been in practice since 1999. Dr. Marcu provides the following procedures including, but not limited to colonoscopy, EGD, ERCP, flex sig, liver biopsy, paracentesis, Remicade infusion, small bowel endoscopy, percutaneous endoscopic gastrostomy, and colon with banding of internal hemorroids. He has a special interest in advanced endoscopy. He is on staff at SSM Health St. Joseph Hospital - St. Charles. Dr. Marcu is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 20 other conditions, according to our data. His clinical expertise encompasses Benign Esophageal Stricture, Lower Esophageal Ring, Menetrier Disease, Gastrectomy, and Colonoscopy. Dr. Marcu is board certified in American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Medical Group
Dr. Richard Geisman is a gastroenterologist who treats patients ages 18 and older. His specialties include general gastroenterology; colon cancer prevention; Crohn's disease; ulcerative colitis; inflammatory bowel disease (IBD); gastroesophageal reflux disease (GERD); and acid reflux. He also performs colonoscopies and upper gastrointestinal endoscopies. Dr. Geisman provides quality, compassionate medical care to his patients, who appreciate how professional, attentive, and personable he is. He takes his time to listen and provides them with a thorough explanation and guidance on treatment and next steps. His mission is to help his patients achieve the best overall health possible. Dr. Geisman is a fellow with the American Gastroenterological Association and a member of the American Society Gastrointestinal Endoscopy. Fun fact: Dr. Geisman's hobbies include exercise, reading, golf, bicycling, and traveling. Dr. Geisman is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 15 other conditions, according to our data. His clinical expertise encompasses Diverticular Disease, Esophagitis, Turcot Syndrome, Endoscopy, and Colonoscopy. Dr. Geisman is board certified in American Board Of Internal Medicine , American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Medical Group
Dr. Diwakaran is board certified in gastroenterology as well as in internal medicine. He has been in practice since 2002. Dr. Diwakaran served a gastroenterology fellowship at Saint Louis University Hospital after his residency training at Wayne State University - Detroit Medical Center. He attended medical school at Madras Medical College in India. Dr. Diwakaran provides the following procedures including, but not limited to colonoscopy, EGD, flex sig, liver biopsy, paracentesis, Remicade infusion, small bowel endoscopy, percutaneous endoscopic gastrostomy, and colon with banding of internal hemorroids. He has a special interest in colon colonoscopy for colon cancer prevention. He is on staff at SSM Health St. Joseph Hospital - St. Charles and SSM Heatlh St. Joseph Hospital - Lake Saint Louis. Dr. Diwakaran is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Esophagitis, Gastrointestinal Bleeding, Painful Swallowing, Endoscopy, and Gastrectomy. Dr. Diwakaran is board certified in American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
SSM Health Medical Group
Dr. David Westrich is a gastroenterologist who treats patients ages 18 and older. He diagnoses and treats various gastrointestinal (GI) conditions, including heartburn, acid reflux, swallowing problems, upset stomach, upper abdominal pain, stomach and intestinal ulcers, irritable bowel syndrome (IBS), functional dyspepsia, blood in the stool, chronic constipation, fecal incontinence, and inflammatory bowel disease. He also performs colon cancer screenings, colon polyp removals, upper GI endoscopies, and lower GI colonoscopies. Dr. Westrich provides patients with compassionate care, communicating clearly and honestly, while developing a treatment plan that matches each patient's needs and goals. His patients appreciate that he listens, is very thorough, and takes the time to explain conditions and any proposed treatments. Dr. Westrich is a member of the American Medical Association; American Gastroenterological Association; American College of Gastroenterology; and American Society for Gastrointestinal Endoscopy. Fun fact: Before becoming a doctor, Dr. Westrich wanted to be a math teacher. Dr. Westrich is rated as an Experienced provider by MediFind in the treatment of Ulcerative Colitis. His clinical expertise encompasses Familial Adenomatous Polyposis, Gardner Syndrome, Turcot Syndrome, Irritable Bowel Syndrome (IBS), and Gastrostomy. Dr. Westrich is board certified in American Board Of Internal Medicine , American Board Of Internal Medicine/Gastroenterology , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
Last Updated: 04/28/2026









