ICD-10-CM > S00-T88 > S70-S79 > S70 > S70.3 > S70.32 > S70.321 S70.321 Blister (nonthermal), right thigh Non-Billable/Non-Specific Codes S70.321A..., initial encounterS70.321D..., subsequent encounterS70.321S..., sequela