ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.5 > T24.50 > T24.502 T24.502 Corrosion of first degree of unspecified site of left lower limb, except ankle and foot Non-Billable/Non-Specific Codes T24.502A..., initial encounterT24.502D..., subsequent encounterT24.502S..., sequela