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290 Senile and presenile organic psychotic conditions
Excludes: psychoses classifiable to 295-298.8 occurring in the senium
without dementia or delirium (295.0-298.8)
transient organic psychotic conditions (293.-)
dementia not classified as senile, presenile, or arterio-
sclerotic (294.1)
290.0 Senile dementia, simple type
Dementia occurring usually after the age of 65 in which any cerebral pathology
other than that of senile atrophic change can be reasonably excluded.
Excludes: mild memory disturbances, not amounting to dementia, associated
with senile brain disease (310.1)
senile dementia:
depressed or paranoid type (290.2)
with confusion and/or delirium (290.3)
290.1 Presenile dementia
Dementia occurring usually before the age of 65 in patients with the
relatively rare forms of diffuse or lobar cerebral atrophy. Use additional
code to identify the associated neurological condition.
Brain syndrome with presenile brain disease
Circumscribed atrophy of the brain
Dementia in:
Alzheimer's disease
Pick's disease of the brain
Excludes: arteriosclerotic dementia (290.4)
dementia associated with other cerebral conditions (294.1)
290.2 Senile dementia, depressed or paranoid type
A type of senile dementia characterized by development of advanced old age,
progressive in nature, in which a variety of delusions and hallucinations of a
persecutory, depressive and somatic content are also present. Disturbance of
the sleep/waking cycle and preoccupation with dead people are often
particularly prominent.
Senile psychosis NOS
Excludes: senile dementia:
NOS (290.0)
with delirium and/or confusion (290.3)
290.3 Senile dementia with acute confusional state
Senile dementia with a superimposed reversible episode of acute confusional
state
Excludes: senile:
dementia NOS (290.0)
psychosis NOS (290.2)
290.4 Arteriosclerotic dementia
Dementia attributable, because of physical signs [on examination of the
central nervous system] to degenerative arterial disease of the brain.
Symptoms suggesting a focal lesion in the brain are common. There may be a
fluctuating or patchy intellectual defect with insight, and an intermittent
course is common. Clinical differentiation from senile or presenile dementia,
which may coexist with it, may be very difficult or impossible. Use
additional code to identify cerebral atherosclerosis (437.0).
Excludes: suspected cases with no clear evidence of arteriosclerosis (290.9)
290.8 Other
290.9 Unspecified
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