ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.6 > T22.63 > T22.632 T22.632 Corrosion of second degree of left upper arm Non-Billable/Non-Specific Codes T22.632A..., initial encounterT22.632D..., subsequent encounterT22.632S..., sequela