ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.7 > T25.71 T25.71 Corrosion of third degree of ankle Non-Billable/Non-Specific Codes T25.711Corrosion of third degree of right ankleT25.711A..., initial encounterT25.711D..., subsequent encounterT25.711S..., sequelaT25.712Corrosion of third degree of left ankleT25.712A..., initial encounterT25.712D..., subsequent encounterT25.712S..., sequelaT25.719Corrosion of third degree of unspecified ankleT25.719A..., initial encounterT25.719D..., subsequent encounterT25.719S..., sequela