ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.7 > T25.79 T25.79 Corrosion of third degree of multiple sites of ankle and foot Non-Billable/Non-Specific Codes T25.791Corrosion of third degree of multiple sites of right ankle and footT25.791A..., initial encounterT25.791D..., subsequent encounterT25.791S..., sequelaT25.792Corrosion of third degree of multiple sites of left ankle and footT25.792A..., initial encounterT25.792D..., subsequent encounterT25.792S..., sequelaT25.799Corrosion of third degree of multiple sites of unspecified ankle and footT25.799A..., initial encounterT25.799D..., subsequent encounterT25.799S..., sequela