S36.400 Unspecified injury of duodenumNon-billable ICD-10-CM code.
S38.1 Crushing injury of abdomen, lower back, and pelvis ("injury to intra-abdominal organs (S36.-)")S36.39XA Other injury of stomach, initial encounterS36.39XD Other injury of stomach, subsequent encounterS36.39XS Other injury of stomach, sequelaS36.4 Injury of small intestineS36.40 Unspecified injury of small intestineS36.400 Unspecified injury of duodenum (this code)S36.400A Unspecified injury of duodenum, initial encounterS36.400D Unspecified injury of duodenum, subsequent encounterS36.400S Unspecified injury of duodenum, sequelaS36.408 Unspecified injury of other part of small intestineS36.408A Unspecified injury of other part of small intestine, initial encounter