Injury to musculocutaneous nerve

This code signifies a traumatic injury affecting the musculocutaneous nerve, a peripheral nerve originating from the brachial plexus. Such an injury can result in weakness or paralysis of the biceps brachii, brachialis, and coracobrachialis muscles, leading to impaired elbow flexion and supination, along with sensory deficits in the lateral forearm.

Apply this code when documentation clearly indicates a direct injury to the musculocutaneous nerve, such as from a fracture, dislocation, laceration, or blunt trauma to the upper arm. Supporting clinical notes should detail the mechanism of injury and the resulting motor and/or sensory deficits consistent with musculocutaneous nerve damage.

• Differentiate from other brachial plexus injuries; this code is specific to the musculocutaneous nerve.
• Ensure documentation specifies "injury" rather than a non-traumatic condition like neuropathy or entrapment, which would require different codes.
• Consider an external cause code (E-code) to describe the circumstances of the injury, if available.