Huntington's disease

This code represents Huntington's disease, a progressive neurodegenerative genetic disorder characterized by involuntary movements (chorea), cognitive decline, and psychiatric problems. It results from a trinucleotide repeat expansion in the HTT gene, leading to neuronal loss in specific brain regions.

Use this code for patients diagnosed with Huntington's disease, regardless of the stage of the disease. Documentation should clearly state the diagnosis of Huntington's disease, often supported by genetic testing results or a strong clinical presentation. This code is appropriate for initial diagnosis, ongoing management, and complications directly attributable to the disease.

• Do not confuse with other choreiform disorders; ensure documentation specifically states Huntington's disease.
• Code any associated psychiatric manifestations or cognitive deficits separately, if documented as distinct conditions.
• Consider sequencing this code as the primary diagnosis when it is the main reason for the encounter.