Oth degeneratv disord of nervous sys in dis classd elswhr

This code signifies a degenerative neurological condition that is a manifestation or complication of another underlying disease process, rather than a primary neurological disorder. It describes neurological degeneration that is secondary to a systemic or other classified disease.

Use this code when documentation clearly links a degenerative nervous system disorder to an underlying disease classified elsewhere in the ICD-10-CM. Examples include neurological degeneration secondary to metabolic disorders, infectious diseases, or certain autoimmune conditions. The primary underlying disease must be coded first.

• Always sequence the underlying disease first, as this code is a "manifestation" code.
• Ensure documentation explicitly states the degenerative neurological disorder is "due to" or "secondary to" another specified condition.
• Avoid using this code for primary degenerative neurological disorders (e.g., Alzheimer's, Parkinson's) which have their own specific codes.