ICD-10-CM > S00-T88 > S30-S39 > S35 > S35.3 > S35.34 > S35.349 S35.349 Unspecified injury of inferior mesenteric vein Non-Billable/Non-Specific Codes S35.349A..., initial encounterS35.349D..., subsequent encounterS35.349S..., sequela