Dementia due to normal pressure hydrocephalus

Definition

Dementia due to normal pressure hydrocephalus results from excess accumulation of cerebrospinal fluid in the brain as a result of idiopathic, non-obstructive causes but can also be secondary to haemorrhage, infection or inflammation. Progression is gradual but intervention (e.g., shunt) may result in improvement of symptoms, especially if administered earlier in the course of the condition. Typically, cognitive impairments include reduced processing speed and deficits in executive functioning and attention. These symptoms are also typically accompanied by gait abnormalities and urinary incontinence. Brain imaging to reveal ventricular volume and characterize brain displacement is often necessary to confirm the diagnosis.

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

• 6D85.0Dementia due to Parkinson disease
• 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
• 6D85.7Dementia due to injury to the head
• 6D85.8Dementia due to pellagra