Other lesions of median nerve, left upper limb

This code signifies a non-traumatic lesion or dysfunction of the median nerve affecting the left upper extremity, excluding carpal tunnel syndrome. It encompasses conditions like nerve entrapment (other than carpal tunnel), inflammation, or other damage to the median nerve.

Use this code for patients presenting with symptoms such as pain, numbness, tingling, or weakness in the left hand and forearm consistent with median nerve involvement, but where carpal tunnel syndrome has been ruled out. Documentation should clearly specify the left side and exclude a diagnosis of carpal tunnel syndrome.

• Ensure documentation specifies "left upper limb" and "median nerve."
• Distinguish carefully from G56.02 (Carpal tunnel syndrome, left upper limb); this code is for other lesions.
• Consider an external cause code if the lesion is due to trauma or an external factor.