ICD-10-CM > S00-T88 > T20-T25 > T25 > T25.7 > T25.72 > T25.729 T25.729 Corrosion of third degree of unspecified foot Non-Billable/Non-Specific Codes T25.729A..., initial encounterT25.729D..., subsequent encounterT25.729S..., sequela