F00.0** Asterisk (manifestation)

Dementia in Alzheimer disease with early onset (G30.0†)

Coding rules (TT06)

●Cannot be used as primary diagnosis

Dual coding (†/*)

This is an asterisk (*) manifestation code — usually paired with a dagger (†) etiology code.

→ Full dagger (†) ↔ asterisk (*) mapping table

Coding guidance (WHO 2019)

Dementia in Alzheimer disease with onset before the age of 65, with a relatively rapid deteriorating course and with marked multiple disorders of the higher cortical functions. Alzheimer disease, type 2 Presenile dementia, Alzheimer type Primary degenerative dementia of the Alzheimer type, presenile onset

Sibling codes

F00*Dementia in Alzheimer disease (G30.-†)F00.1*Dementia in Alzheimer disease with late onset (G30.1†)F00.2*Dementia in Alzheimer disease, atypical or mixed type (G30.8†)F00.9*Dementia in Alzheimer disease, unspecified (G30.9†)