Since an ileus does not always involve obstruction, should a diagnosis of postoperative ileus be assigned code K91.3, Postprocedural intestinal obstruction? Previously, postoperative ileus defaulted to a complication code. However, in ICD-10-CM, there is no default code assignment for postoperative ileus.
Query the physician to determine if the ileus is a postoperative complication. If the physician confirms that the ileus is a postoperative complication, assign code K91.89, Other postprocedural complications and disorders of digestive system. Code K56.7, Ileus, unspecified, should be assigned as an additional diagnosis to describe the specific complication. If, however, after query, the physician confirms that the ileus is not a surgical complication, assign only code K56.7. Only assign code K91.3, Postprocedural intestinal obstruction, for an obstructive ileus that the physician has documented as a post-op complication.