ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.5 > T22.51 > T22.512 T22.512 Corrosion of first degree of left forearm Non-Billable/Non-Specific Codes T22.512A..., initial encounterT22.512D..., subsequent encounterT22.512S..., sequela