We evaluated the clinicopathological features of patients who developed intestinal complications following surgery for gastrointestinal non-Hodgkin's lymphoma (NHL) and determined the risk factors for complications. We retrospectively analyzed 28 patients with gastrointestinal NHL who were treated at our institution between January 2007 and June 2012. Seven patients (25.0%) underwent surgery for bleeding, perforation, or ileus caused by the gastrointestinal NHL, particularly those with involvement of the jejunum or ileum. Half the patients with small intestinal NHL required surgery for complications; patients with this form of NHL were therefore considered to be at a high risk of complications. Those with semicircular ulcerative lesions, a protruding deformity, or systemic NHL involving the small intestine were also considered to be at a particularly high risk of intestinal complications.