ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.2 > T23.22 > T23.229 T23.229 Burn of second degree of unspecified single finger (nail) except thumb Non-Billable/Non-Specific Codes T23.229A..., initial encounterT23.229D..., subsequent encounterT23.229S..., sequela