ICD-10-CM > S00-T88 > S50-S59 > S50 > S50.8 > S50.82 > S50.829 S50.829 Blister (nonthermal) of unspecified forearm Non-Billable/Non-Specific Codes S50.829A..., initial encounterS50.829D..., subsequent encounterS50.829S..., sequela