ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.1 > T23.12 > T23.129 T23.129 Burn of first degree of unspecified single finger (nail) except thumb Non-Billable/Non-Specific Codes T23.129A..., initial encounterT23.129D..., subsequent encounterT23.129S..., sequela