ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.7 > T23.73 > T23.732 T23.732 Corrosion of third degree of multiple left fingers (nail), not including thumb Non-Billable/Non-Specific Codes T23.732A..., initial encounterT23.732D..., subsequent encounterT23.732S..., sequela