Patients who present or develop inflammatory bowel disease at The University of California Irvine Medical Center will be asked to participate in the Research Registry. Patients must provide written, informed consent to allow past, current and future identifiable medical records related to gastrointestinal hemorrhage to be placed in the study's registry. The medical record information that will be used for the Research Registry will be directly related to inflammatory bowel disease. However, since concurrent medical conditions and treatments, not directly related to inflammatory bowel disease may impact inflammatory bowel disease it is likely that all of the past, current and future identifiable medical record information will be placed in the Research Registry.