S44.0 - Injury of ulnar nerve at upper arm level S44 - Injury of nerves at shoulder and upper arm level S44.0 - Injury of ulnar nerve at upper arm level S44.00 - Injury of ulnar nerve at upper arm level, unspecified arm S44.01 - Injury of ulnar nerve at upper arm level, right arm S44.02 - Injury of ulnar nerve at upper arm level, left arm