ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.73 T22.73 Corrosion of third degree of upper arm Non-Billable/Non-Specific Codes T22.731Corrosion of third degree of right upper armT22.731A..., initial encounterT22.731D..., subsequent encounterT22.731S..., sequelaT22.732Corrosion of third degree of left upper armT22.732A..., initial encounterT22.732D..., subsequent encounterT22.732S..., sequelaT22.739Corrosion of third degree of unspecified upper armT22.739A..., initial encounterT22.739D..., subsequent encounterT22.739S..., sequela