Injury to median nerve

This code signifies a traumatic injury affecting the median nerve, a major nerve in the upper extremity responsible for motor and sensory function in parts of the hand and forearm. Such injuries can result in sensory deficits (e.g., numbness, tingling) and motor weakness or paralysis in the distribution of the median nerve, impacting fine motor skills and grip strength.

Apply this code when documentation clearly indicates a direct injury to the median nerve, such as from a laceration, crush injury, or fracture that compromises the nerve. This code is appropriate for acute traumatic events, not for chronic conditions like carpal tunnel syndrome unless an acute injury is superimposed. Supporting documentation should include the mechanism of injury, clinical findings consistent with median nerve damage, and diagnostic test results if available.

• Differentiate from entrapment neuropathies (e.g., carpal tunnel syndrome, G56.0x) unless an acute injury is the cause.
• Specify the open wound code (e.g., 881.2x, 882.2x) as the primary diagnosis if the nerve injury is due to an open wound.
• Consider an additional E-code to describe the external cause of the injury.