F03

Unspecified dementia

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Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · F03
Excludes 2

dementia with delirium or acute confusional state (F05) mild memory disturbance due to known physiological condition (F06.8)

Synonyms

Major neurocognitive disorder NOS Presenile dementia NOS Presenile psychosis NOS Primary degenerative dementia NOS Senile dementia NOS Senile dementia depressed or paranoid type Senile psychosis NOS

Inherited from F01-F09Mental disorders due to known physiological conditions
Note

This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.

Inherited from chapter 5Mental, Behavioral and Neurodevelopmental disorders
Includes

disorders of psychological development

Excludes 2

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Official Guidelines for F03

FY 2026 ›
I.C.5Chapter-specific guidanceChapter 5: Mental, Behavioral and Neurodevelopmental disorders

Subsections

Sections that reference F03

Sections whose FY 2026 text names F03, its F03 category, or a range containing it — the chapter guidance above is the authoritative source.

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