S40.82 - Blister (nonthermal) of upper arm S40.8 - Other superficial injuries of upper arm S40.82 - Blister (nonthermal) of upper arm S40.821 - Blister (nonthermal) of right upper arm S40.822 - Blister (nonthermal) of left upper arm S40.829 - Blister (nonthermal) of unspecified upper arm