ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.7 > T25.73 > T25.732 T25.732 Corrosion of third degree of left toe(s) (nail) Non-Billable/Non-Specific Codes T25.732A..., initial encounterT25.732D..., subsequent encounterT25.732S..., sequela