Diagnosis Make an Appointment Refer a Patient Ask a Question Reviewed by Miranda Y. Ku, MD, MPH (May 01, 2013) The diagnosis of IBD is performed with blood tests, physical exam, radiography and endoscopic procedures. Specific testing may include: Abdominal x-ray Barium enema Abdominopelvic CT or MRI Small bowel follow through CT enterography Colonoscopy Capsule endoscopy The gold standard for evaluating patients who have abdominal symptoms suspicious for IBD is colonoscopy (with ileoscopy if Crohn’s disease is suspected). This allows for the ability to obtain biopsies, which aid in the diagnosis. National Jewish Health performs upper endoscopies in individuals with suspected upper GI involvement in Crohn’s disease, and small bowel capsule endoscopies in patients with suspected Crohn’s ileitis who had a normal colonoscopy. Symptoms Treatment Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.