ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.0 > T23.02 > T23.021 T23.021 Burn of unspecified degree of single right finger (nail) except thumb Non-Billable/Non-Specific Codes T23.021A..., initial encounterT23.021D..., subsequent encounterT23.021S..., sequela