ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.6 > S31.65 > S31.655 S31.655 Open bite of abdominal wall, periumbilic region with penetration into peritoneal cavity Non-Billable/Non-Specific Codes S31.655A..., initial encounterS31.655D..., subsequent encounterS31.655S..., sequela