ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.7 > T23.74 > T23.741 T23.741 Corrosion of third degree of multiple right fingers (nail), including thumb Non-Billable/Non-Specific Codes T23.741A..., initial encounterT23.741D..., subsequent encounterT23.741S..., sequela