ICD-10 Code G32.89 – Other specified degenerative disorders of nervous system in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G32.89 – Other specified degenerative disorders of nervous system in diseases classified elsewhere
What it is
This code identifies a degenerative disorder of the nervous system that is documented as occurring in another disease, but does not fit a more specific ICD-10-CM category. Use it when the underlying condition is known and the neurologic manifestation is described clearly.
Clinical signs
Clinical features vary; refer to documentation. You may see progressive neurologic decline, abnormal movement, weakness, or cognitive changes, depending on the associated disease and affected nervous system area.
When to use this code
Use G32.89 when the chart states a specified degenerative nervous system disorder due to another disease and no more specific code exists. Confirm that the record links the neurologic condition to an underlying cause elsewhere in the chart. Code the underlying disease first when required by sequencing rules.
Do not use for
Do not use this code for unspecified degenerative nervous system disease without a documented cause, or when a more specific neurologic code is available. Check documentation if the record does not clearly identify the associated disease.
Coding tip
Verify both the degenerative neurologic diagnosis and the underlying disease before assigning G32.89.