Mononeuritis multiplex

This code represents a neurological disorder characterized by simultaneous or sequential damage to multiple non-contiguous peripheral nerves. It results in motor and/or sensory deficits in the distribution of the affected nerves, often presenting as asymmetric weakness, numbness, or pain.

Use this code when documentation clearly indicates inflammation or damage affecting several distinct peripheral nerves in different parts of the body. This diagnosis is often supported by nerve conduction studies and electromyography showing multifocal neuropathy.

• Differentiate from polyneuropathy (e.g., diabetic neuropathy) where nerve damage is more diffuse and symmetrical.
• Look for specific documentation of "mononeuritis multiplex" or descriptions of multiple, separate nerve lesions.
• Code any underlying systemic disease (e.g., vasculitis, diabetes) as a primary diagnosis if it is the cause of the mononeuritis multiplex.