Medicine:ICD-10 Chapter V: Mental and behavioural disorders

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This is a shortened version of fifth chapter of the ICD-10: Mental and behavioural disorders. It covers ICD codes F00 to F99. All versions of the ICD-10, including the most recent one (2019), can be browsed freely on the website of the World Health Organisation (WHO). The ICD-10 can also be downloaded in PDF-form.

The WHO has made its classification of mental disorders available in three publications. The first is Chapter V of the ICD-10, which features short summaries of mental disorders, and is intended as a quick reference point. The second is the Clinical descriptions and diagnostic guidelines (CDDG), or the "Blue Book", which is for clinical and educational use. It features longer definitions of mental disorders, along with diagnostic criteria and guidelines. The third is the Diagnostic criteria for research (DCR or DCR-10), or the "Green Book", which is intended for research purposes, and to be used in conjunction with the Blue Book. As with the rest of the ICD-10, both books can be downloaded for free from the website of the WHO.

The codes of this chapter are used by the fifth, most recent version of the Diagnostic and Statistical Manual of Mental Disorders, or DSM-5, which is the primary system for diagnosing mental disorders in the world. The ICD-10 system is used to code these disorders, and strictly seen, the ICD has always been the official system of diagnosing mental diseases in the United States. Due to the dominance of the DSM, however, not even many professionals within psychiatry realize this.[1] The DSM and the ICD form a "dual-system": the DSM is used for diagnostic criteria while the ICD-codes are used for reimbursement claims towards the health insurance companies. The CDDG (Blue Book) also contains diagnostic criteria but for the most part therapists use those in the DSM. This structure has been criticized, with people wondering why there should be two separate systems for the classification of mental disorders. It has been proposed that the ICD supersede the DSM.[2]

Organic, including symptomatic, mental disorders (F00–F09)

Mental and behavioural disorders due to psychoactive substance use (F10–F19)

Schizophrenia, schizotypal and delusional disorders (F20–F29)

  • F20 Schizophrenia
    • F20.0 Paranoid schizophrenia
    • F20.1 Hebephrenic schizophrenia (Disorganized schizophrenia)
    • F20.2 Catatonic schizophrenia
    • F20.3 Undifferentiated schizophrenia
    • F20.4 Post-schizophrenic depression
    • F20.5 Residual schizophrenia
    • F20.6 Simple schizophrenia
    • F20.8 Other schizophrenia
      • Cenesthopathic schizophrenia
      • Schizophreniform disorder NOS
      • Schizophreniform psychosis NOS
    • F20.9 Schizophrenia, unspecified
  • F21 Schizotypal disorder
  • F22 Persistent delusional disorders
    • F22.0 Delusional disorder
    • F22.8 Other persistent delusional disorders
      • Delusional dysmorphophobia
      • Involutional paranoid state
      • Paranoia querulans
    • F22.9 Persistent delusional disorder, unspecified
  • F23 Acute and transient psychotic disorders
    • F23.0 Acute polymorphic psychotic disorder without symptoms of schizophrenia
    • F23.1 Acute polymorphic psychotic disorder with symptoms of schizophrenia
    • F23.2 Acute schizophrenia-like psychotic disorder
    • F23.3 Other acute predominantly delusional psychotic disorders
    • F23.8 Other acute and transient psychotic disorders
    • F23.9 Acute and transient psychotic disorder, unspecified
  • F24 Induced delusional disorder
    • Folie à deux
    • Induced paranoid disorder
    • Induced psychotic disorder
  • F25 Schizoaffective disorders
    • F25.0 Schizoaffective disorder, manic type
    • F25.1 Schizoaffective disorder, depressive type
    • F25.2 Schizoaffective disorder, mixed type
    • F25.8 Other schizoaffective disorders
    • F25.9 Schizoaffective disorder, unspecified
  • F28 Other nonorganic psychotic disorders
  • F29 Unspecified nonorganic psychosis

Mood (affective) disorders (F30–F39)

  • F30 Manic episode
  • F31 Bipolar affective disorder
    • F31.0 Bipolar affective disorder, current episode hypomanic
    • F31.1 Bipolar affective disorder, current episode manic without psychotic symptoms
    • F31.2 Bipolar affective disorder, current episode manic with psychotic symptoms
    • F31.3 Bipolar affective disorder, current episode mild or moderate depression
    • F31.4 Bipolar affective disorder, current episode severe depression without psychotic symptoms
    • F31.5 Bipolar affective disorder, current episode severe depression with psychotic symptoms
    • F31.6 Bipolar affective disorder, current episode mixed
    • F31.7 Bipolar affective disorder, currently in remission
    • F31.8 Other bipolar affective disorders
    • F31.9 Bipolar affective disorder, unspecified
  • F32 Depressive episode
    • F32.0 Mild depressive episode
    • F32.1 Moderate depressive episode
    • F32.2 Severe depressive episode without psychotic symptoms
    • F32.3 Severe depressive episode with psychotic symptoms
    • F32.8 Other depressive episodes
    • F32.9 Depressive episode, unspecified
  • F33 Recurrent depressive disorder
    • F33.0 Recurrent depressive disorder, current episode mild
    • F33.1 Recurrent depressive disorder, current episode moderate
    • F33.2 Recurrent depressive disorder, current episode severe without psychotic symptoms
    • F33.3 Recurrent depressive disorder, current episode severe with psychotic symptoms
    • F33.4 Recurrent depressive disorder, currently in remission
    • F33.8 Other recurrent depressive disorders
    • F33.9 Recurrent depressive disorder, unspecified
  • F34 Persistent mood (affective) disorders
  • F38 Other mood (affective) disorders
    • F38.0 Other single mood (affective) disorders
      • Mixed affective episode
    • F38.1 Other recurrent mood (affective) disorders
      • Recurrent brief depressive episodes
    • F38.8 Other specified mood (affective) disorders
  • F39 Unspecified mood (affective) disorder

Neurotic, stress-related and somatoform disorders (F40–F48)

Behavioural syndromes associated with physiological disturbances and physical factors (F50–F59)

Disorders of adult personality and behaviour (F60–F69)

Mental retardation (F70–F79)

  • F70 Mild mental retardation
  • F71 Moderate mental retardation
  • F72 Severe mental retardation
  • F73 Profound mental retardation
  • F78 Other mental retardation
  • F79 Unspecified mental retardation

Disorders of psychological development (F80–F89)

Behavioural and emotional disorders with onset usually occurring in childhood and adolescence (F90–F98)

Unspecified mental disorder (F99)

  • F99 Mental disorder, not otherwise specified

See also


  1. Reed, Geoffrey M. (2010). "Toward ICD-11: Improving the clinical utility of WHO's International Classification of mental disorders". Professional Psychology: Research and Practice 41 (6): 457–464. doi:10.1037/a0021701. 
  2. "ICD vs. DSM". Monitor on Psychology (APA) 40 (9): 63. 
  3. Cochran, Susan D.; Drescher, Jack; Kismödi, Eszter; Giami, Alain; García-Moreno, Claudia; Atalla, Elham; Marais, Adele; Meloni Vieira, Elisabeth et al. (2014). "Proposed declassification of disease categories related to sexual orientation in the International Statistical Classification of Diseases and Related Health Problems (ICD-11)". Bulletin of the World Health Organization 92 (9): 672–679. doi:10.2471/BLT.14.135541. PMID 25378758.