ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.4 > T22.43 T22.43 Corrosion of unspecified degree of upper arm Non-Billable/Non-Specific Codes T22.431Corrosion of unspecified degree of right upper armT22.431A..., initial encounterT22.431D..., subsequent encounterT22.431S..., sequelaT22.432Corrosion of unspecified degree of left upper armT22.432A..., initial encounterT22.432D..., subsequent encounterT22.432S..., sequelaT22.439Corrosion of unspecified degree of unspecified upper armT22.439A..., initial encounterT22.439D..., subsequent encounterT22.439S..., sequela