ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.3 > T25.31 T25.31 Burn of third degree of ankle Non-Billable/Non-Specific Codes T25.311Burn of third degree of right ankleT25.311A..., initial encounterT25.311D..., subsequent encounterT25.311S..., sequelaT25.312Burn of third degree of left ankleT25.312A..., initial encounterT25.312D..., subsequent encounterT25.312S..., sequelaT25.319Burn of third degree of unspecified ankleT25.319A..., initial encounterT25.319D..., subsequent encounterT25.319S..., sequela