Major Neurocognitive Disorder (Alzheimer’s Disease)
Significant cognitive decline interferes with independence, with an insidious onset and gradual progression characteristic of Alzheimer’s disease.
Timing requirement
Longitudinal course
Insidious onset and gradual progression
Timing in context
Probable versus possible attribution depends on genetic evidence and the pattern/course of decline.
Sources and review
Last content review: August 21, 2026