ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.5 > T24.50 > T24.501 T24.501 Corrosion of first degree of unspecified site of right lower limb, except ankle and foot Non-Billable/Non-Specific Codes T24.501A..., initial encounterT24.501D..., subsequent encounterT24.501S..., sequela