ICD-10-CM > S00-T88 > S60-S69 > S60 > S60.4 > S60.42 > S60.423 S60.423 Blister (nonthermal) of left middle finger Non-Billable/Non-Specific Codes S60.423A..., initial encounterS60.423D..., subsequent encounterS60.423S..., sequela