ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.6 > S31.65 > S31.65A S31.65A Open bite of abdominal wall, unspecified flank with penetration into peritoneal cavity Non-Billable/Non-Specific Applicable To Open bite of abdominal wall, flank NOS, with penetration into peritoneal cavity Codes S31.65AA..., initial encounterS31.65AD..., subsequent encounterS31.65AS..., sequela