ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.4 > T25.41 T25.41 Corrosion of unspecified degree of ankle Non-Billable/Non-Specific Codes T25.411Corrosion of unspecified degree of right ankleT25.411A..., initial encounterT25.411D..., subsequent encounterT25.411S..., sequelaT25.412Corrosion of unspecified degree of left ankleT25.412A..., initial encounterT25.412D..., subsequent encounterT25.412S..., sequelaT25.419Corrosion of unspecified degree of unspecified ankleT25.419A..., initial encounterT25.419D..., subsequent encounterT25.419S..., sequela