ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.1 > T23.13 > T23.139 T23.139 Burn of first degree of unspecified multiple fingers (nail), not including thumb Non-Billable/Non-Specific Codes T23.139A..., initial encounterT23.139D..., subsequent encounterT23.139S..., sequela