ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.0 > T23.01 T23.01 Burn of unspecified degree of thumb (nail) Non-Billable/Non-Specific Codes T23.011Burn of unspecified degree of right thumb (nail)T23.011A..., initial encounterT23.011D..., subsequent encounterT23.011S..., sequelaT23.012Burn of unspecified degree of left thumb (nail)T23.012A..., initial encounterT23.012D..., subsequent encounterT23.012S..., sequelaT23.019Burn of unspecified degree of unspecified thumb (nail)T23.019A..., initial encounterT23.019D..., subsequent encounterT23.019S..., sequela