The 20 Best Diarrhea Doctors Near Me in Lake St. Louis, MO
Find the Top Diarrhea Experts and Specialists
SSM Health Medical Group
Louay Omran, MD, is a board-certified gastroenterologist, and a formally trained advanced endoscopist. He has the ability to perform endoscopic ultrasound (EUS), ERCP, and luminal stenting to relieve obstruction. Dr. Omran is available for the evaluation and management of patients with both common and challenging gastrointestinal disorders. Dr. Omran attended medical school in Syria, and completed internal medicine residencies and two fellowships (geriatric medicine and gastroenterology & hepatology) at Saint Louis University. He also completed a fellowship in advanced endoscopy and pancreatic diseases at the Medical University of South Carolina. He is a board certified physician nutritionist. Before joining SSM Health Medical Group, Dr. Omran practiced gastroenterology and advanced endoscopy at SSM Health Saint Louis University Hospital as a member of SLUCare. For over 15 years, he was a key faculty member participating in the education and training of students, residents and fellows. He won numerous teaching awards in the process. Dr. Omran was elected to become a Fellow of the American College of Physicians. He is also a member of the American Society for Gastrointestinal Endoscopy, the American Gastrointestinal Association, and the American College of Gastroenterology. Dr. Omran is married to Pascale Salam, MD, and has two sons. His hobbies include reading modern history and biographies, trivia, soccer and tennis. Dr. Omran is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Choledocholithiasis, Childhood Pancreatitis, Acute Pancreatitis, Endoscopy, and Colonoscopy. Dr. Omran 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.
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Michael Zerega is an Internal Medicine provider practicing medicine in Lake Saint Louis, Missouri. Dr. Zerega is rated as an Advanced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 16 other conditions, according to our data. His clinical expertise encompasses Collagenous Colitis, Colitis, Hemorrhoids, Gastrectomy, and Gastrostomy.
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 Diarrhea. 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. 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 Diarrhea. 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. 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 Diarrhea. 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 Diarrhea. 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.
SSM Health Medical Group
Dr. Hemmersmeier is board certified in family medicine. He completed his residency at Deaconess Hospital - St. Louis after earning his medical degree at Kirksville College of Osteopathic Medicine. Dr. Hemmersmeier has been in practice in O'Fallon, MO since 1998. He has a special interest in sports medicine and has volunteered as a coach in the community and at his church in conjunction with his children's athletic interests. Dr. Hemmersmeier has been awarded recognition from the National Committee for Quality Assurance (NCQA) Diabetes and Stroke Physician Recognition Programs for meeting national standards for diabetes and stroke care. Dr. Hemmersmeier is part of a Patient-Centered Medical Home. Dr. Hemmersmeier uses telehealth services to conduct video office visits with current, established patients for: upper respiratory infection, sore throat, cough, seasonal allergies, skin rashes or lesions, mouth and cold sores, flu symptoms, conjunctivitis, UTI, gout, yeast infection and travel medication. A forward-facing camera and internet access are required, and a tablet or computer/laptop may be used. Telehealth appointments can be scheduled online through MyChart. Dr. Hemmersmeier is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 14 other conditions, according to our data. His clinical expertise encompasses Familial Hypertension, Coronary Heart Disease, Sacroiliac Joint Disease, and Hypothyroidism. Dr. Hemmersmeier is board certified in American Board Of Family Medicine , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
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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 Diarrhea. 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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Scott Roos is a primary care provider, practicing in Family Medicine in Lake Saint Louis, Missouri. Dr. Roos is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Familial Combined Hyperlipidemia, Xanthoma, and Cirrhosis.
Abdul Rauf is a primary care provider, practicing in Internal Medicine in Lake St. Louis, Missouri. Dr. Rauf is rated as an Experienced provider by MediFind in the treatment of Diarrhea. His clinical expertise encompasses Multisystem Inflammatory Syndrome in Children (MIS-C), Nephrogenic Diabetes Insipidus, Diabetes Insipidus (DI), Dry Mouth, and Reconstructive Urology Surgery. Dr. Rauf is board certified in American Board Of Internal Medicine , Drug Enforcement Administration , Missouri Dept Of Health/Narcotics&Dangerous Drugs , and Missouri State Board Of Registration.
Deborah Goldberg is an Internal Medicine specialist and a Pediatrics provider practicing medicine in Lake St. Louis, Missouri. Dr. Goldberg is rated as an Experienced provider by MediFind in the treatment of Diarrhea. Her clinical expertise encompasses Pediatric Myocarditis, Multisystem Inflammatory Syndrome in Children (MIS-C), Viral Gastroenteritis, Endoscopy, and Colonoscopy. Dr. Goldberg is board certified in American Board Of Internal Medicine , 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.
Compass Health Network Wentzville
Muhammad Islam is a primary care provider, practicing in Family Medicine in Wentzville, Missouri. Dr. Islam is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 19 other conditions, according to our data. His clinical expertise encompasses Viral Pharyngitis, Cellulitis, Peptic Ulcer, and Tracheobronchomalacia.
St. Luke's Internal Medicine At WingHaven
Gary Gray is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Gray is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Hereditary Neuralgic Amyotrophy, Chronic Cough, Anemia, and Hemolytic Crisis.
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 Diarrhea. 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 Diarrhea. 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.
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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 Diarrhea. 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.
BJC Medical Group At O'Fallon
Judith Dibble is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Dibble is rated as an Experienced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 7 other conditions, according to our data. Her clinical expertise encompasses Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, Breast Cancer, and Nephrosclerosis.
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James Ketchum is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. He has been practicing medicine for over 44 years. Dr. Ketchum is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Sitosterolemia, Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, and Hypertension.
Contemporary Womens Healthcare
Brian Grus is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Grus is rated as an Experienced provider by MediFind in the treatment of Diarrhea. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Type 2 Diabetes (T2D), Osteomyelitis in Children, Hypothyroidism, and Patulous Eustachian Tube.
Contemporary Womens Healthcare
Jamie Tueth is a primary care provider, practicing in Internal Medicine in O Fallon, Missouri. Dr. Tueth is rated as an Experienced provider by MediFind in the treatment of Diarrhea. She is also highly rated in 3 other conditions, according to our data. Her clinical expertise encompasses Thrombocytopenia, Hypothyroidism, Type 2 Diabetes (T2D), and Obesity in Children.
Last Updated: 04/28/2026





