Other hereditary ataxias

This code represents a group of rare, inherited neurological disorders characterized by progressive incoordination and degeneration of the cerebellum and other parts of the nervous system. These conditions are typically genetic in origin and result in a variety of neurological symptoms beyond just ataxia, such as dysarthria, nystagmus, and spasticity.

Use this code when documentation specifies a hereditary ataxia that does not fit into more specific categories like Friedreich's ataxia or other named hereditary ataxias. This code is appropriate when the genetic basis is known or strongly suspected, and the specific type of hereditary ataxia is not otherwise classified. Supporting documentation should include genetic testing results, neurological examination findings, and a definitive diagnosis from a neurologist.

• Do not use this code if a more specific hereditary ataxia code (e.g., G11.1, G11.2) is available and documented.
• Ensure the documentation clearly states "hereditary ataxia" and specifies that it is not one of the more common, individually classified types.
• Consider sequencing this code as a primary diagnosis when it is the main reason for the encounter, or as a secondary diagnosis when it is a comorbidity impacting treatment or management.