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F06.9 ICD-10-CA code: Unspecified mental disorder due to brain damage and dysfunction and to physical disease

F06.9 is the ICD-10-CA code for “Unspecified mental disorder due to brain damage and dysfunction and to physical disease” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

F06.9

Unspecified mental disorder due to brain damage and dysfunction and to physical disease

Short description: Mental disrd dt brain dam dysf & dis NOS

ICD-10-CA · Canada · Also written F069

Index terms

Entries in CIHI’s alphabetical index that lead to F06.9. Searching the index by the condition the note names is how coders reach this code.

  • Syndrome, brain
  • Syndrome, brain, organic
  • Disease, diseased, mental, organic
  • Psychotic episode due to or associated with physical condition
  • Disorder (of), cognitive, due to (secondary to) general medical condition
  • Disorder (of), mental (or behavioral) (nonpsychotic), organic or symptomatic
  • Disorder (of), mental (or behavioral) (nonpsychotic), due to (secondary to), general medical condition
  • Disorder (of), mental (or behavioral) (nonpsychotic), due to (secondary to), brain disease, damage or dysfunction

Notes for F06.9

As CIHI prints them, with any note F06.9 takes from the headings above it.

Includes

  • Organic:• brain syndrome NOS• mental disorder NOS
  • Disorders of psychological developmentFrom Chapter 5: Mental and behavioural disorders (F00-F99)

Use additional code

Add a code for this detail when the note documents it.

Excludes

Conditions classified elsewhere.

Note

  • Includes miscellaneous conditions causally related to brain disorder due to primary cerebral disease, to systemic disease affecting the brain secondarily, to exogenous toxic substances or hormones, to endocrine disorders, or to other somatic illnesses.From F06 Other mental disorders due to brain damage and dysfunction and to physical disease
  • 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.Dementia (F00-F03) is a syndrome due to disease of the brain, usually of a chronic or progressive nature, in which there is disturbance of multiple higher cortical functions, including memory, thinking, orientation, comprehension, calculation, learning capacity, language, and judgement. Consciousness is not clouded. The impairments of cognitive function are commonly accompanied, and occasionally preceded, by deterioration in emotional control, social behaviour, or motivation. This syndrome occurs in Alzheimer's disease, in cerebrovascular disease, and in other conditions primarily or secondarily affecting the brain.From F00-F09 Organic, including symptomatic, mental disorders

Where F06.9 sits

  1. 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
  2. 2Block F00-F09Organic, including symptomatic, mental disorders
  3. 3Category F06Other mental disorders due to brain damage and dysfunction and to physical disease
  4. 4Valid code F06.9Unspecified mental disorder due to brain damage and dysfunction and to physical disease

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See F06.9 in the CIHI source

Frequently asked questions

What does ICD-10-CA code F06.9 mean?

F06.9 is the ICD-10-CA code for “Unspecified mental disorder due to brain damage and dysfunction and to physical disease” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is F06.9 in ICD-10-CA?

F06.9 sits under F06 Other mental disorders due to brain damage and dysfunction and to physical disease, within F00-F09 Organic, including symptomatic, mental disorders, within Chapter 5: Mental and behavioural disorders (F00-F99).

What coding notes apply to F06.9?

ICD-10-CA lists Includes, Note, Excludes, Use additional code notes for F06.9, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside F06.9

F06.0Organic hallucinosisF06.1Organic catatonic disorderF06.2Organic delusional [schizophrenia-like] disorderF06.3Organic mood [affective] disordersF06.4Organic anxiety disorderF06.5Organic dissociative disorderF06.6Organic emotionally labile [asthenic] disorderF06.7Mild cognitive disorderF06.8Other specified mental disorders due to brain damage and dysfunction and to physical disease