Diphtheritic polyneuritis

This code represents a neurological complication of diphtheria, specifically polyneuritis, which is inflammation of multiple peripheral nerves. It typically manifests as muscle weakness, paralysis, and sensory disturbances following a diphtheria infection. The neurological damage results from the diphtheria toxin affecting nerve tissues.

Use this code when documentation clearly indicates a diagnosis of polyneuritis directly attributed to a diphtheria infection. This typically occurs during the recovery phase of diphtheria or as a delayed complication. Supporting documentation should specify the link between the diphtheria and the polyneuropathy.

• Always sequence the diphtheria infection code (A36.x) first, followed by this code to indicate the manifestation.
• Ensure the medical record explicitly states "diphtheritic" or "due to diphtheria" in relation to the polyneuritis.
• Do not use for polyneuropathy from other causes; verify the etiology is diphtheria.