ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.6 > T25.61 > T25.619 T25.619 Corrosion of second degree of unspecified ankle Non-Billable/Non-Specific Codes T25.619A..., initial encounterT25.619D..., subsequent encounterT25.619S..., sequela