S18-217 Non-invasive Blood Test for Diagnosing Crohn's Disease and Ulcerative Colitis Diagnosis and sub-typing of inflammatory bowel disease (IBD) subsets, such as Crohn's disease (CD) and ulcerative colitis (UC), often require the use of repeated, invasive, and expensive endoscopy procedures, which are not without risk. Samuel Rubin Aida Habtezion