Lesion of radial nerve, unspecified upper limb

This code signifies a non-specific injury or damage to the radial nerve affecting an unspecified upper limb. It encompasses conditions like nerve compression, entrapment, or direct trauma that result in impaired radial nerve function, such as wrist drop or sensory deficits in the hand.

Apply this code when documentation indicates a lesion of the radial nerve but does not specify laterality (left or right upper limb). This is appropriate for initial encounters where laterality is not yet determined or when the medical record explicitly states "unspecified upper limb."

• Avoid using this code if laterality (left or right) is documented; instead, choose a more specific G56.31 or G56.32 code.
• Ensure the documentation clearly supports a radial nerve lesion and not a more generalized neuropathy or other nerve involvement.
• Query the provider for laterality if it's missing and the patient has a unilateral presentation.