This study was undertaken to prospectively assess all morbidity and mortality associated with temporary loop ileostomy. Eighty-three consecutive patients of a median age of 45 years required temporary fecal diversion after either ileoanal or low colorectal anastomosis (n = 72), for perianal Crohn's disease (n = 5), or for other reasons (n = 6). All loop ileostomies were supported with a rod, and fecal diversion was maintained for a mean of 10 weeks. To date, 67 patients have had re-establishment of intestinal continuity. Stoma closure was affected through a parastomal incision in 64 patients; in three, a laparotomy was required. The closure was stapled side to side in 49 patients, while a hand-sewn anastomosis was done in the other 18 patients; all skin wounds were left open. The mean length of surgery for ileostomy closure was 56 minutes, and the mean hospital stay was five days. Nine patients (10.8 percent) developed 10 complications, nine of which required hospitalization. Specifically, four patients developed dehydration and electrolyte abnormalities secondary to high stoma output, and two had anastomotic leaks that spontaneously healed following conservative management. One patient developed a superficial wound infection that spontaneously drained itself. One patient developed a partial small bowel obstruction that resolved without surgery after a four-day hospitalization. One stoma retracted after supporting rod removal and prompted premature closure. There was no stomal ischemia, hemorrhage, prolapse, or mortality in this series. Thus, loop ileostomy is a safe way to achieve fecal diversion.