Polyneuropathy in other diseases classified elsewhere

This code signifies a generalized disorder affecting multiple peripheral nerves, occurring as a manifestation or complication of another underlying systemic disease. The polyneuropathy is not the primary condition but rather a secondary effect of a separate, classifiable illness.

Assign this code when documentation clearly indicates polyneuropathy secondary to a disease not specifically categorized elsewhere in ICD-9-CM, such as certain metabolic disorders, autoimmune conditions, or paraneoplastic syndromes. The underlying disease must be identified and coded first.

• Always sequence the underlying systemic disease first, followed by this code to indicate the neurological manifestation.
• Ensure documentation specifies "polyneuropathy" and links it to a distinct, non-neurological primary condition.
• Avoid using this code for polyneuropathies with specific ICD-9-CM codes (e.g., diabetic polyneuropathy, alcoholic polyneuropathy).