ICD-10-CM > S00-T88 > S00-S09 > S00 > S00.9 > S00.92 S00.92 Blister (nonthermal) of unspecified part of head Non-Billable/Non-Specific Codes S00.92XA..., initial encounterS00.92XD..., subsequent encounterS00.92XS..., sequela