ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.3 > S20.32 > S20.322 S20.322 Blister (nonthermal) of left front wall of thorax Non-Billable/Non-Specific Codes S20.322A..., initial encounterS20.322D..., subsequent encounterS20.322S..., sequela