Ruben Aymerich, MD, board certified in gastroenterology, has been in practice in the St. Louis area for the past 10 years.

As an advocate for colon cancer awareness, Dr. Aymerich emphasizes the importance of early detection and living a healthy lifestyle. "Through appropriate screenings, colon cancer can be prevented," explains Dr. Aymerich. As a cycling enthusiast and triathlete, he emphasizes the importance of staying active. "I tell my patients to live a healthy lifestyle, listen to your body, and ask your doctor if you need help."

Dr. Aymerich specializes in the diagnosis and treatment of gastrointestinal diseases, such as reflux, celiac disease, Crohn’s disease and ulcerative colitis. He is well trained to perform a variety of tests, including Infrared Coagulation – for treatment of hemorrhoids, upper endoscopy, colonoscopy, and ERCPs. He is a member of the American College of Gastroenterology.

He completed his gastroenterology fellowship training and residency training at Barnes-Jewish Hospital. He received his medical degree from the University of Puerto Rico School of Medicine.


  • Gastroenterology

    A gastroenterologist is a healthcare professional who has been educated and trained to treat patients who are experiencing health problems or have diseases that affect the gastrointestinal tract and liver. They also diagnose and treat diseases that affect the esophagus, stomach, small intestine, colon, rectum, pancreas, gallbladder, bile ducts, and liver.

  • Credentials



    8:30AM - 4:00PM


    8:30AM - 4:00PM


    8:30AM - 4:00PM


    8:30AM - 4:00PM


    8:30AM - 4:00PM





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    Ruben Aymerich, MD generally accepts new patients.

    Ruben Aymerich, MD has not indicated on the profile that their office offers tele-health visits. You can call their office to find out more about telehealth visits.

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    The top specialties of Ruben Aymerich, MD include Gastroenterology

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    The office is located at 1011 Bowles Ave in Fenton, MO.

    Ruben Aymerich, MD accepts various types of health insurance, but individual coverage may be variable. You should check with your health insurance whether the particular doctor is in network or not.

    Colon Cancer, Diverticulitis, Rectal Cancer, Difficulty Swallowing , Achalasia, Appendicitis, Esophagitis, GERD, Heartburn, Gastritis, Hepatitis, Hepatitis A, Hepatitis B, Hepatitis C, Hepatitis E, Hiatal hernia, Irritable Bowel Syndome (IBS), Rectal Prolapse, Ulcerative Colitis (UC), Crohn's disease (CD), Celiac Disease (Gluten allergy), Hemorrhoids, Stomach ulcer (Peptic Ulcer disesae), Stomach cancer, Esophageal cancer, Rectal cancer, Anal Fissure, Anorectal Abscess, Constipation, H Pylori, Pancreatitis, Pancreatic cancer, Esophageal stricutre, Pancreatic pseudocyst, Rectal bleeding, Barrett's esophagus, Abdominal Pain, Fatty Liver Disease

    Barium Swallow, Biliary Mamometry, Capsule Enteroscopy, Colonscopy, Endoscopic Ultrasound (EUS), Endoscopy, Enteroscopy, ERCP, Esophageal Dilatation, Polypectomy, Pseudocyst drainage, Stricture dilation, Barium Enema, Gallbladder Scan

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