ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.3 > S20.32 S20.32 Blister (nonthermal) of front wall of thorax Non-Billable/Non-Specific Codes S20.321Blister (nonthermal) of right front wall of thoraxS20.321A..., initial encounterS20.321D..., subsequent encounterS20.321S..., sequelaS20.322Blister (nonthermal) of left front wall of thoraxS20.322A..., initial encounterS20.322D..., subsequent encounterS20.322S..., sequelaS20.323Blister (nonthermal) of bilateral front wall of thoraxS20.323A..., initial encounterS20.323D..., subsequent encounterS20.323S..., sequelaS20.324Blister (nonthermal) of middle front wall of thoraxS20.324A..., initial encounterS20.324D..., subsequent encounterS20.324S..., sequelaS20.329Blister (nonthermal) of unspecified front wall of thoraxS20.329A..., initial encounterS20.329D..., subsequent encounterS20.329S..., sequela