ICD-10-CM Codes
F01-F99
F01-F09
F05-
2023 ICD-10-CM Diagnosis Code F05

2023 ICD-10-CM Diagnosis Code F05

Delirium due to known physiological condition

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

F05 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM F05 became effective on October 1, 2022.
This is the American ICD-10-CM version of F05 - other international versions of ICD-10 F05 may differ.

Applicable To

Acute or subacute brain syndrome
Acute or subacute confusional state (nonalcoholic)
Acute or subacute infective psychosis
Acute or subacute organic reaction
Acute or subacute psycho-organic syndrome
Delirium of mixed etiology
Delirium superimposed on dementia
Sundowning

Code First

Code First Help

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

the underlying physiological condition

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as F05. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

delirium NOS (
ICD-10-CM Diagnosis Code R41.0
Disorientation, unspecified
Applicable To
- Confusion NOS
- Delirium NOS
R41.0
)

Type 2 Excludes

Type 2 Excludes Help

A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (F05) and the excluded code together.

delirium tremens alcohol-induced or unspecified (
ICD-10-CM Diagnosis Code F10.231
Alcohol dependence with withdrawal delirium
F10.231
,
ICD-10-CM Diagnosis Code F10.921
Alcohol use, unspecified with intoxication delirium
F10.921
)

The following code(s) above F05 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to F05:

F01-F99
2023 ICD-10-CM Range F01-F99
Mental, Behavioral and Neurodevelopmental disorders
Includes
- disorders of psychological development
Type 2 Excludes
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Mental, Behavioral and Neurodevelopmental disorders
F01-F09
2023 ICD-10-CM Range F01-F09
Mental 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.
Mental disorders due to known physiological conditions

Approximate Synonyms

Alzheimer's disease with behavioral disturbance and delerium
Alzheimer's disease with delerium
Alzheimers dementia w behavioral disturbance w delirium
Alzheimers dementia with delirium
Alzheimers dementia, early onset, w delirium
Alzheimers dementia, late onset, w delirium
Alzheimers dementia. With delirium
Delirium due to multiple etiologies
Delirium of mixed origin
Dementia alzheimers type, late onset with delirium
Dementia with behavioral disturbance and delerium
Dementia with behavioral disturbance with delirium
Dementia, presenile with delirium
Dementia, primary degenerative, alzheimer type
Dementia, senile with delirium
Multi infarct dementia with delirium
Presenile dementia with delirium
Primary degenerative dementia of the alzheimer type, presenile onset, with delirium
Primary degenerative dementia of the alzheimer type, senile onset, with delirium
Senile dementia with delirium
Vascular dementia w delirium

ICD-10-CM F05 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

880 Acute adjustment reaction and psychosocial dysfunction

Convert F05 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to F05:

Type 2 Excludes: F03
, F06

ICD-10-CM Diagnosis Code F03
Unspecified dementia
Applicable To
- 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
Type 1 Excludes
- senility NOS (R41.81)
Type 2 Excludes
- mild memory disturbance due to known physiological condition (F06.8)
- senile dementia with delirium or acute confusional state (F05)
ICD-10-CM Diagnosis Code F06
Other mental disorders due to known physiological condition
Code First
- the underlying physiological condition
Includes
- mental disorders due to endocrine disorder
- mental disorders due to exogenous hormone
- mental disorders due to exogenous toxic substance
- mental disorders due to primary cerebral disease
- mental disorders due to somatic illness
- mental disorders due to systemic disease affecting the brain
Type 1 Excludes
- unspecified dementia (F03)
Type 2 Excludes
- delirium due to known physiological condition (F05)
- dementia as classified in F01-F02
- other mental disorders associated with alcohol and other psychoactive substances (F10-F19)
Use Additional: G30
, T81.89

ICD-10-CM Diagnosis Code G30
Alzheimer's disease
Includes
- Alzheimer's dementia senile and presenile forms
Type 1 Excludes
- senile degeneration of brain NEC (G31.1)
- senile dementia NOS (F03)
- senility NOS (R41.81)
Use Additional
- code, if applicable, to identify:
- delirium, if applicable (F05)
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
ICD-10-CM Diagnosis Code T81.89
Other complications of procedures, not elsewhere classified
Use Additional
- code to specify complication, such as:
- postprocedural delirium (F05)

Diagnosis Index entries containing back-references to F05:

Confusion, confused R41.0
ICD-10-CM Diagnosis Code R41.0
Disorientation, unspecified
Applicable To
Confusion NOS
Delirium NOS
- epileptic F05
Delirium, delirious (acute or subacute) (not alcohol- or drug-induced) (with dementia) R41.0
ICD-10-CM Diagnosis Code R41.0
Disorientation, unspecified
Applicable To
Confusion NOS
Delirium NOS
- due to (secondary to)
  - general medical condition F05
  - multiple etiologies F05
- postprocedural F05 (postoperative)
- puerperal F05
Dementia (degenerative (primary)) (old age) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) F03.90
ICD-10-CM Diagnosis Code F03.90
Unspecified dementia, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
Applicable To
Dementia NOS
- senile F03
  ICD-10-CM Diagnosis Code F03
  Unspecified dementia
  2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
  Applicable To
  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
  Type 1 Excludes
  senility NOS (R41.81)
  Type 2 Excludes
  mild memory disturbance due to known physiological condition (F06.8)
  senile dementia with delirium or acute confusional state (F05)
  - with acute confusional state F05
Epilepsy, epileptic, epilepsia (attack) (cerebral) (convulsion) (fit) (seizure) G40.909
ICD-10-CM Diagnosis Code G40.909
Epilepsy, unspecified, not intractable, without status epilepticus
Applicable To
Epilepsy NOS
Epileptic convulsions NOS
Epileptic fits NOS
Epileptic seizures NOS
Recurrent seizures NOS
Seizure disorder NOS
- twilight F05
Insanity, insane - see also Psychosis
- confusional F28
  ICD-10-CM Diagnosis Code F28
  Other psychotic disorder not due to a substance or known physiological condition
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Applicable To
  Chronic hallucinatory psychosis
  Other specified schizophrenia spectrum and other psychotic disorder
  - acute or subacute F05
Psychosis, psychotic F29
ICD-10-CM Diagnosis Code F29
Unspecified psychosis not due to a substance or known physiological condition
Applicable To
Psychosis NOS
Unspecified schizophrenia spectrum and other psychotic disorder
Type 1 Excludes
mental disorder NOS (F99)
unspecified mental disorder due to known physiological condition (F09)
- confusional F29
  ICD-10-CM Diagnosis Code F29
  Unspecified psychosis not due to a substance or known physiological condition
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Applicable To
  Psychosis NOS
  Unspecified schizophrenia spectrum and other psychotic disorder
  Type 1 Excludes
  mental disorder NOS (F99)
  unspecified mental disorder due to known physiological condition (F09)
  - acute or subacute F05
- organic F09
  ICD-10-CM Diagnosis Code F09
  Unspecified mental disorder due to known physiological condition
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Applicable To
  Mental disorder NOS due to known physiological condition
  Organic brain syndrome NOS
  Organic mental disorder NOS
  Organic psychosis NOS
  Symptomatic psychosis NOS
  Code First
  the underlying physiological condition
  Type 1 Excludes
  mild neurocognitive disorder due to known physiological condition (F06.7-)
  psychosis NOS (F29)
  - due to or associated with
    - disease
      - endocrine or metabolic F06.8
        ICD-10-CM Diagnosis Code F06.8
        Other specified mental disorders due to known physiological condition
        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        Applicable To
        Epileptic psychosis NOS
        Obsessive-compulsive and related disorder due to a known physiological condition
        Organic dissociative disorder
        Organic emotionally labile [asthenic] disorder
        acute or subacute F05
    - infection
      - brain (intracranial) F06.8
        ICD-10-CM Diagnosis Code F06.8
        Other specified mental disorders due to known physiological condition
        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        Applicable To
        Epileptic psychosis NOS
        Obsessive-compulsive and related disorder due to a known physiological condition
        Organic dissociative disorder
        Organic emotionally labile [asthenic] disorder
        acute or subacute F05
    - trauma, brain (birth) (from electric current) (surgical) F06.8
      ICD-10-CM Diagnosis Code F06.8
      Other specified mental disorders due to known physiological condition
      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      Applicable To
      Epileptic psychosis NOS
      Obsessive-compulsive and related disorder due to a known physiological condition
      Organic dissociative disorder
      Organic emotionally labile [asthenic] disorder
      - acute or subacute F05
    - epilepsy transient F05 (acute)
  - infective F06.8
    ICD-10-CM Diagnosis Code F06.8
    Other specified mental disorders due to known physiological condition
    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    Epileptic psychosis NOS
    Obsessive-compulsive and related disorder due to a known physiological condition
    Organic dissociative disorder
    Organic emotionally labile [asthenic] disorder
    - acute or subacute F05
  - post-traumatic F06.8
    ICD-10-CM Diagnosis Code F06.8
    Other specified mental disorders due to known physiological condition
    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    Epileptic psychosis NOS
    Obsessive-compulsive and related disorder due to a known physiological condition
    Organic dissociative disorder
    Organic emotionally labile [asthenic] disorder
    - acute or subacute F05
- infective F05 (acute) (subacute)
Puerperal, puerperium (complicated by, complications)
- delirium NEC F05
Senile, senility R41.81
- see also condition
ICD-10-CM Diagnosis Code R41.81
Age-related cognitive decline
Applicable To
Senility NOS
- with
  - acute confusional state F05
State (of)
- confusional (psychogenic) F44.89
  ICD-10-CM Diagnosis Code F44.89
  Other dissociative and conversion disorders
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Applicable To
  Ganser's syndrome
  Psychogenic confusion
  Psychogenic twilight state
  Trance and possession disorders
  - acute - see also Delirium
    - with
      - senility or dementia F05
  - epileptic F05
- twilight
  - epileptic F05
Sundowning F05
Syndrome - see also Disease
- psycho-organic (nonpsychotic severity) F07.9
  ICD-10-CM Diagnosis Code F07.9
  Unspecified personality and behavioral disorder due to known physiological condition
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Applicable To
  Organic psychosyndrome
  - acute or subacute F05
Twilight state
- epileptic F05

ICD-10-CM Codes Adjacent To F05

F03.B4 …… with anxiety

F03.C Unspecified dementia, severe

F03.C0 …… without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

F03.C1 Unspecified dementia, severe, with behavioral disturbance

F03.C11 Unspecified dementia, severe, with agitation

F03.C18 Unspecified dementia, severe, with other behavioral disturbance

F03.C2 …… with psychotic disturbance

F03.C3 …… with mood disturbance

F03.C4 …… with anxiety

F04 Amnestic disorder due to known physiological condition

F05 Delirium due to known physiological condition

F06 Other mental disorders due to known physiological condition

F06.0 Psychotic disorder with hallucinations due to known physiological condition

F06.1 Catatonic disorder due to known physiological condition

F06.2 Psychotic disorder with delusions due to known physiological condition

F06.3 Mood disorder due to known physiological condition

F06.30 …… unspecified

F06.31 …… with depressive features

F06.32 …… with major depressive-like episode

F06.33 …… with manic features

F06.34 …… with mixed features

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2023 ICD-10-CM Diagnosis Code F05

Delirium due to known physiological condition

Disorientation, unspecified

Alcohol dependence with withdrawal delirium

Alcohol use, unspecified with intoxication delirium

Mental, Behavioral and Neurodevelopmental disorders

Mental disorders due to known physiological conditions

Unspecified dementia

Other mental disorders due to known physiological condition

Alzheimer's disease

Other complications of procedures, not elsewhere classified

Disorientation, unspecified

Disorientation, unspecified

Unspecified dementia, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

Unspecified dementia

Epilepsy, unspecified, not intractable, without status epilepticus

Other psychotic disorder not due to a substance or known physiological condition

Unspecified psychosis not due to a substance or known physiological condition

Unspecified psychosis not due to a substance or known physiological condition

Unspecified mental disorder due to known physiological condition

Other specified mental disorders due to known physiological condition

Other specified mental disorders due to known physiological condition

Other specified mental disorders due to known physiological condition

Other specified mental disorders due to known physiological condition

Other specified mental disorders due to known physiological condition

Age-related cognitive decline

Other dissociative and conversion disorders

Unspecified personality and behavioral disorder due to known physiological condition