2019 ICD-10-CM Diagnosis Code F05

Delirium due to known physiological condition

    2016 2017 2018 2019 Billable/Specific Code
  • F05 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM F05 became effective on October 1, 2018.
  • 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

      2016 2017 2018 2019 Billable/Specific Code
    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

      2016 2017 2018 2019 Billable/Specific Code
    F10.231
    ,
    ICD-10-CM Diagnosis Code F10.921

    Alcohol use, unspecified with intoxication delirium

      2016 2017 2018 2019 Billable/Specific Code
    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
    2019 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
    2019 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 v36.0):
  • 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
Code annotations containing back-references to F05:
  • Type 2 Excludes: F03
    , F06
    ICD-10-CM Diagnosis Code F03

    Unspecified dementia

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Applicable To
    • 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
    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

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    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: T81.89
    , G30
    ICD-10-CM Diagnosis Code T81.89

    Other complications of procedures, not elsewhere classified

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Use Additional
    • code to specify complication, such as:
    • postprocedural delirium (F05)
    ICD-10-CM Diagnosis Code G30

    Alzheimer's disease

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    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 to identify:
    • delirium, if applicable (F05)
    • dementia with behavioral disturbance (F02.81)
    • dementia without behavioral disturbance (F02.80)

Diagnosis Index entries containing back-references to F05:
  • Confusion, confused R41.0
    ICD-10-CM Diagnosis Code R41.0

    Disorientation, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    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

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Confusion NOS
    • Delirium NOS
    • due to (secondary to)
      • general medical condition F05
      • multiple etiologies F05
      • unknown etiology F05
    • postprocedural F05 (postoperative)
    • puerperal F05
  • Dementia (degenerative (primary)) (old age) (persisting) F03.90
    ICD-10-CM Diagnosis Code F03.90

    Unspecified dementia without behavioral disturbance

      2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
    Applicable To
    • Dementia NOS
    • senile F03
      ICD-10-CM Diagnosis Code F03

      Unspecified dementia

        2016 2017 2018 2019 Non-Billable/Non-Specific Code
      Applicable To
      • 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
      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

      2016 2017 2018 2019 Billable/Specific Code
    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 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

      2016 2017 2018 2019 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)
    • confusional F29
      ICD-10-CM Diagnosis Code F29

      Unspecified psychosis not due to a substance or known physiological condition

        2016 2017 2018 2019 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 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
      • 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 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 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 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 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 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

      2016 2017 2018 2019 Billable/Specific Code Adult Dx (15-124 years)
    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 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 Billable/Specific Code
      Applicable To
      • Organic psychosyndrome
      • acute or subacute F05
  • Twilight state
    • epileptic F05

ICD-10-CM Codes Adjacent To F05
F01.51 …… with behavioral disturbance
F02 Dementia in other diseases classified elsewhere
F02.8 Dementia in other diseases classified elsewhere
F02.80 …… without behavioral disturbance
F02.81 …… with behavioral disturbance
F03 Unspecified dementia
F03.9 Unspecified dementia
F03.90 …… without behavioral disturbance
F03.91 …… with behavioral disturbance
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.