ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.1 > T23.12 > T23.122 T23.122 Burn of first degree of single left finger (nail) except thumb Non-Billable/Non-Specific Codes T23.122A..., initial encounterT23.122D..., subsequent encounterT23.122S..., sequela