ICD-10-CM > S00-T88 > S30-S39 > S36 > S36.4 > S36.42 S36.42 Contusion of small intestine Non-Billable/Non-Specific Codes S36.420Contusion of duodenumS36.420A..., initial encounterS36.420D..., subsequent encounterS36.420S..., sequelaS36.428Contusion of other part of small intestineS36.428A..., initial encounterS36.428D..., subsequent encounterS36.428S..., sequelaS36.429Contusion of unspecified part of small intestineS36.429A..., initial encounterS36.429D..., subsequent encounterS36.429S..., sequela