Mononeuritis of upper limb, unspecified

This code signifies inflammation or damage to a single peripheral nerve in the upper extremity, without further specification of the exact nerve involved. It indicates a localized neurological dysfunction affecting motor or sensory function in the arm, forearm, or hand.

Assign this code when documentation clearly states "mononeuritis of upper limb" but lacks specificity regarding the particular nerve (e.g., radial, ulnar, median). It is appropriate for cases where the physician has diagnosed a mononeuropathy in the upper limb but has not identified the precise nerve affected, or when the etiology is unknown.

• Avoid using this code if a more specific nerve is identified (e.g., carpal tunnel syndrome, ulnar nerve entrapment).
• Always query the provider for greater specificity regarding the affected nerve if possible.
• Consider sequencing this code after any underlying systemic conditions that may be causing the mononeuritis.