ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.9 > S20.92 S20.92 Blister (nonthermal) of unspecified parts of thorax Non-Billable/Non-Specific Codes S20.92XA..., initial encounterS20.92XD..., subsequent encounterS20.92XS..., sequela