ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.73 > T22.732 T22.732 Corrosion of third degree of left upper arm Non-Billable/Non-Specific Codes T22.732A..., initial encounterT22.732D..., subsequent encounterT22.732S..., sequela