ICD-10-CM > S00-T88 > S30-S39 > S30 > S30.8 > S30.82 > S30.821 S30.821 Blister (nonthermal) of abdominal wall Non-Billable/Non-Specific Codes S30.821A..., initial encounterS30.821D..., subsequent encounterS30.821S..., sequela