ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.6 > S31.65 > S31.657 S31.657 Open bite of abdominal wall, left flank with penetration into peritoneal cavity Non-Billable/Non-Specific Codes S31.657A..., initial encounterS31.657D..., subsequent encounterS31.657S..., sequela