ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.5 > T22.51 T22.51 Corrosion of first degree of forearm Non-Billable/Non-Specific Codes T22.511Corrosion of first degree of right forearmT22.511A..., initial encounterT22.511D..., subsequent encounterT22.511S..., sequelaT22.512Corrosion of first degree of left forearmT22.512A..., initial encounterT22.512D..., subsequent encounterT22.512S..., sequelaT22.519Corrosion of first degree of unspecified forearmT22.519A..., initial encounterT22.519D..., subsequent encounterT22.519S..., sequela