ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.7 > T23.74 T23.74 Corrosion of third degree of multiple fingers (nail), including thumb Non-Billable/Non-Specific Codes T23.741Corrosion of third degree of multiple right fingers (nail), including thumbT23.741A..., initial encounterT23.741D..., subsequent encounterT23.741S..., sequelaT23.742Corrosion of third degree of multiple left fingers (nail), including thumbT23.742A..., initial encounterT23.742D..., subsequent encounterT23.742S..., sequelaT23.749Corrosion of third degree of unspecified multiple fingers (nail), including thumbT23.749A..., initial encounterT23.749D..., subsequent encounterT23.749S..., sequela