ICD-10-CM > S00-T88 > S60-S69 > S60 > S60.3 > S60.32 > S60.321 S60.321 Blister (nonthermal) of right thumb Non-Billable/Non-Specific Codes S60.321A..., initial encounterS60.321D..., subsequent encounterS60.321S..., sequela