ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.71 > T22.712 T22.712 Corrosion of third degree of left forearm Non-Billable/Non-Specific Codes T22.712A..., initial encounterT22.712D..., subsequent encounterT22.712S..., sequela