ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.4 > T24.49 > T24.492 T24.492 Corrosion of unspecified degree of multiple sites of left lower limb, except ankle and foot Non-Billable/Non-Specific Codes T24.492A..., initial encounterT24.492D..., subsequent encounterT24.492S..., sequela