ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.4 > T24.43 T24.43 Corrosion of unspecified degree of lower leg Non-Billable/Non-Specific Codes T24.431Corrosion of unspecified degree of right lower legT24.431A..., initial encounterT24.431D..., subsequent encounterT24.431S..., sequelaT24.432Corrosion of unspecified degree of left lower legT24.432A..., initial encounterT24.432D..., subsequent encounterT24.432S..., sequelaT24.439Corrosion of unspecified degree of unspecified lower legT24.439A..., initial encounterT24.439D..., subsequent encounterT24.439S..., sequela