I am only relaying the SSA's own information from their website. UC and total colectomy require additional complications in order to qualify.
www.ssa.gov/disability/professionals/bluebook/5.00-Digestive-Adult.htm1. Inflammatory bowel disease (5.06) includes, but is not limited to, Crohn’s disease and ulcerative colitis. These disorders, while distinct entities, share many clinical, laboratory, and imaging findings, as well as similar treatment regimens. Remissions and exacerbations of variable duration are the hallmark of IBD. Crohn’s disease may involve the entire alimentary tract from the mouth to the anus in a segmental, asymmetric fashion. Obstruction, stenosis, fistulization, perineal involvement, and extraintestinal manifestations are common. Crohn’s disease is rarely curable and recurrence may be a lifelong problem, even after surgical resection. In contrast, ulcerative colitis only affects the colon. The inflammatory process may be limited to the rectum, extend proximally to include any contiguous segment, or involve the entire colon.
Ulcerative colitis may be cured by total colectomy.4. Surgical diversion of the intestinal tract, including ileostomy and colostomy, does not preclude gainful activity if you are able to maintain adequate nutrition and function of the stoma. However, if you are not able to maintain adequate nutrition, we will evaluate your impairment under 5.08.