ICD-10-CM > S00-T88 > S90-S99 > S90 > S90.8 > S90.82 > S90.822 S90.822 Blister (nonthermal), left foot Non-Billable/Non-Specific Codes S90.822A..., initial encounterS90.822D..., subsequent encounterS90.822S..., sequela