ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.6 > T25.63 > T25.632 T25.632 Corrosion of second degree of left toe(s) (nail) Non-Billable/Non-Specific Codes T25.632A..., initial encounterT25.632D..., subsequent encounterT25.632S..., sequela