ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.6 > T22.61 > T22.619 T22.619 Corrosion of second degree of unspecified forearm Non-Billable/Non-Specific Codes T22.619A..., initial encounterT22.619D..., subsequent encounterT22.619S..., sequela