F00*3-char group* Asterisk (manifestation)

Dementia in Alzheimer disease (G30.-†)

⇄ Primary-code rule changed vs QĐ4469

Coding rules (TT06)

●Cannot be used as primary diagnosis
●Avoid — more specific 4-5 char codes exist (see below)

Dual coding (†/*)

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

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

Coding guidance (WHO 2019)

Alzheimer disease is a primary degenerative cerebral disease of unknown etiology with characteristic neuropathological and neurochemical features. The disorder is usually insidious in onset and develops slowly but steadily over a period of several years.

Codes within F00*

F00.0*Dementia in Alzheimer disease with early onset (G30.0†)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†)