Dementia ICD-10-CM classifies dementia on the basis of: etiology, severity and associated behavioral disturbances. Etiology refers to the type of dementia. This can include: Vascular dementia F01 Dementia in other diseases classified elsewhere F02 Unspecified dementia F03 Severity includes mild, moderate and severe: Mild - Clearly evident functional impact on daily life, affecting mainly instrumental activities. No longer fully independent; requires occasional assistance with ADLs. Moderate - Extensive functional impact on daily life with impairment in basic activities. No longer independent; requires frequent assistance with ADLs. Sev...