Polyneuropathy in diseases classified elsewhere

This code represents polyneuropathy that arises as a manifestation or complication of another underlying disease process. It indicates a generalized dysfunction of peripheral nerves due to a systemic condition, rather than a primary neurological disorder. The specific type of polyneuropathy and its clinical presentation will vary based on the associated underlying disease.

Use this code when documentation clearly links polyneuropathy to a systemic disease not explicitly classified within the nervous system chapter. This code is appropriate when the underlying disease is the primary condition causing the polyneuropathy, and the polyneuropathy itself is not a primary neurological diagnosis. Documentation should specify both the polyneuropathy and the associated underlying disease.

• Always code the underlying systemic disease first, followed by this code.
• Carefully review the "Excludes1" notes to ensure the polyneuropathy is not specifically classified elsewhere with its underlying cause.
• Avoid using this code for idiopathic polyneuropathy or polyneuropathy due to direct trauma or localized nerve compression.