ICD-10-CM > S00-T88 > S60-S69 > S60 > S60.4 > S60.42 > S60.420 S60.420 Blister (nonthermal) of right index finger Non-Billable/Non-Specific Codes S60.420A..., initial encounterS60.420D..., subsequent encounterS60.420S..., sequela