Corticobasal degeneration

This code identifies corticobasal degeneration (CBD), a rare, progressive neurodegenerative disorder characterized by asymmetric motor dysfunction, cognitive impairment, and cortical sensory deficits. It involves neuronal loss and gliosis primarily affecting the cerebral cortex and basal ganglia. Patients typically present with limb apraxia, alien limb phenomenon, dystonia, rigidity, and dysarthria.

Use this code for documented cases of corticobasal degeneration, a distinct tauopathy. This diagnosis is typically made by a neurologist based on clinical presentation and exclusion of other conditions. Supporting documentation should detail the characteristic motor and cognitive symptoms, often including imaging findings (e.g., asymmetric cortical atrophy) and neurological examination results.

• Differentiate from other atypical parkinsonian syndromes like progressive supranuclear palsy (PSP) or multiple system atrophy (MSA), which have distinct ICD-9-CM codes.
• Ensure documentation clearly specifies "corticobasal degeneration" to avoid confusion with other forms of dementia or movement disorders.
• Consider sequencing with codes for associated symptoms such as dementia (e.g., 294.1x) or specific movement disorders if documented as separate conditions.