ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.5 > T24.59 > T24.591 T24.591 Corrosion of first degree of multiple sites of right lower limb, except ankle and foot Non-Billable/Non-Specific Codes T24.591A..., initial encounterT24.591D..., subsequent encounterT24.591S..., sequela