ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.4 > T24.43 > T24.432 T24.432 Corrosion of unspecified degree of left lower leg Non-Billable/Non-Specific Codes T24.432A..., initial encounterT24.432D..., subsequent encounterT24.432S..., sequela