ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.7 > T25.73 T25.73 Corrosion of third degree of toe(s) (nail) Non-Billable/Non-Specific Codes T25.731Corrosion of third degree of right toe(s) (nail)T25.731A..., initial encounterT25.731D..., subsequent encounterT25.731S..., sequelaT25.732Corrosion of third degree of left toe(s) (nail)T25.732A..., initial encounterT25.732D..., subsequent encounterT25.732S..., sequelaT25.739Corrosion of third degree of unspecified toe(s) (nail)T25.739A..., initial encounterT25.739D..., subsequent encounterT25.739S..., sequela