ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.5 > T25.53 > T25.532 T25.532 Corrosion of first degree of left toe(s) (nail) Non-Billable/Non-Specific Codes T25.532A..., initial encounterT25.532D..., subsequent encounterT25.532S..., sequela