ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.1 > T23.11 > T23.111 T23.111 Burn of first degree of right thumb (nail) Non-Billable/Non-Specific Codes T23.111A..., initial encounterT23.111D..., subsequent encounterT23.111S..., sequela