ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.3 > T23.32 > T23.321 T23.321 Burn of third degree of single right finger (nail) except thumb Non-Billable/Non-Specific Codes T23.321A..., initial encounterT23.321D..., subsequent encounterT23.321S..., sequela