ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.2 > T23.22 > T23.221 T23.221 Burn of second degree of single right finger (nail) except thumb Non-Billable/Non-Specific Codes T23.221A..., initial encounterT23.221D..., subsequent encounterT23.221S..., sequela