Dementia due to Parkinson disease

Definition

Dementia due to Parkinson disease develops among individuals with idiopathic Parkinson disease and is characterized by impairment in attention, memory, executive and visuo-spatial functions. Mental and behavioral symptoms such as changes in affect, apathy and hallucinations may also be present. Onset is insidious and the course is one of gradual worsening of symptoms.

Coding note

This category should never be used in primary tabulation. The codes are provided for use as supplementary or additional codes when it is desired to identify the presence of dementia in diseases classified elsewhere. When dementia is due to multiple aetiologies, code all that apply.

Also indexed as

Nearby in Dementia due to diseases classified elsewhere

• 6D85.1Dementia due to Huntington disease
• 6D85.2Dementia due to exposure to heavy metals or other toxins
• 6D85.3Dementia due to human immunodeficiency virus
• 6D85.4Dementia due to multiple sclerosis
• 6D85.5Dementia due to prion disease
• 6D85.6Dementia due to normal pressure hydrocephalus
• 6D85.7Dementia due to injury to the head
• 6D85.8Dementia due to pellagra