Information for Patients and Visitors of Rockford Gastroenterology about Online Bill Pay Fraud:

Aaron Shiels MD

Aaron J. Shiels, M.D.

Aaron Shiels MD

Dr. Aaron Shiels joined Rockford Gastroenterology Associates in 2004, and currently serves as Managing Partner. He is a board-certified Gastroenterologist. Dr. Shiels received his medical degree from Washington University School of Medicine in St. Louis where he also completed his Internal Medicine Residency and Gastroenterology Fellowship. As a Gastroenterology Fellow, Dr. Shiels received specialized training in diseases of the liver, pancreas, and biliary tract, including diagnostic and therapeutic ERCP. He participated in research projects studying biliary complications after liver transplant surgery and complications following bariatric surgery for morbid obesity.

At the University of Illinois College of Medicine at Rockford, Dr. Shiels holds the title of Clinical Assistant Professor of Medicine, is the Director of the Gastroenterology Curriculum, and serves on the Medical Executive Committee. He has received numerous teaching awards from the medical school, including the Golden Apple.

Dr. Shiels advocates for our GI patients on a national level, serving on the American Society of Gastrointestinal Endoscopy (ASGE) Health and Public Policy Committee and participating in regular visits to senators and representatives offices on Capitol Hill. He is also a member of the American Gastroenterological Association and American College of Gastroenterology.

Dr. Shiels maintains an interest in pancreatic disease, biliary disease, and liver disease including treatment of hepatitis C and has presented on hepatitis C at local and regional meetings. His hobbies include golf, running, and spending time with his family.

  • Conditions Dr. Shiels treats:

    • Abnormal Liver Tests
    • Anemia
    • Acid Reflux/Heartburn/GERD
    • Barrett’s Esophagus
    • Biliary Tract Disorders
    • Celiac Disease
    • Chronic Liver Disease, including Cirrhosis
    • Colon Cancer Prevention
    • Colon Polyps
    • Constipation
    • Clostridium Difficile Infection
    • Diarrhea
    • Esophageal Disorders including Dysphagia (trouble swallowing)
    • Fecal Incontinence & Urgency
    • Fatty Liver (NAFLD/NASH)
    • Gallstones & Gallbladder Disease
    • Hepatitis B & Hepatitis C
    • Hemorrhoids
    • Hiatal Hernia
    • Helicobacter Pylori Infection
    • Irritable Bowel Syndrome (IBS)
    • Pancreatitis (Acute & Chronic)
    • Pancreatic Cysts & Mass
    • Peptic Ulcer Disease (Stomach Ulcers)
    • Radiation Proctitis
    • Rectal bleeding
    • Small Intestinal Bacterial Overgrowth (SIBO)
    • Ulcerative Colitis

    Procedures Dr. Shiels performs:

    • Upper Endoscopy (EGD)
    • Colonoscopy
    • Flexible Sigmoidoscopy
    • Endoscopic Retrograde Cholangiopancreatography (ERCP)
    • Endoscopy for Gastrointestinal Bleeding
    • Ambulatory pH Monitoring (Bravo© pH)
    • Argon Plasma Coagulation (APC)
    • Fecal Microbiota Transplant (FMT) for Chronic C. Difficile Infection
    • PEG Tube Placement (Endoscopic Feeding Tube)