What ICD-11 codes correspond to depression?

Episodic depressive disorder is coded as 6A00 on the ICD-11. Dysthymic depressive disorder is 6A01 and mixed depressive disorder with anxiety is 6A02.

ICD-11 Chapter 06: Mental, behavioural or neurodevelopmental disorders

What is Chapter 06 of ICD-11?

The Chapter 06 of the ICD-11 groups the mental, behavioral and neurodevelopmental disorders. It is the most extensive and clinically relevant chapter of the classification for professionals in mental health, psychiatry, psychology, pediatric neurology and primary care.

In ICD-10, this chapter was equivalent to Chapter F (F00–F99). ICD-11 completely restructures it: it expands the number of diagnostic blocks, updates the terminology, eliminates the artificial distinction between "organic" and "non-organic" disorders, and harmonizes with the DSM-5.

Important news: In ICD-11, sleep disorders and sexual health conditions are separated into their own chapters (07 and 17 respectively), something that in the ICD-10 were mixed within chapter F.

The hierarchy of Chapter 06 has 3 levels:

1st level: Large categories by type of disorder (ex: Mood disorders)
2nd level: Specific illness or disorder (e.g., episodic depressive disorder)
3rd level: Greater clinical specificity (e.g., episodic depression, current moderate episode)

Chapter 06 Blocks

Below are the 13 major blocks of Chapter 06, with their code ranges and main diagnoses. Click on each block to see the most relevant codes.

6A00–6A0Z

Neurodevelopmental disorders

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Conditions that originate during development and are characterized by developmental deficits that produce limitations in personal, social, academic, or occupational functioning. Includes ADHD, autism and learning disorders.

Code	Diagnosis
6A00	Disorders of intellectual development
6A01	Developmental speech or language disorders
6A02	Autism spectrum disorder
6A03	Developmental learning disorder
6A04	Developmental motor coordination disorder
6A05	Attention deficit hyperactivity disorder
6A06	Stereotyped movement disorder
6A0Z	Neurodevelopmental disorders, unspecified

6A20–6A2Y

Schizophrenia or other primary psychotic disorders

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Disorders characterized by distortions in thinking, perception, emotions, language, sense of self, and behavior. It includes schizophrenia, schizoaffective disorder, and delusional disorders.

Code	Diagnosis
6A20	Schizophrenia
6A21	Schizoaffective disorder
6A22	Schizotypal disorder
6A24.Z	Delusional disorder, unspecified
6A23.Z	Acute and transient psychotic disorder, unspecified
6A25	Symptomatic manifestations of primary psychotic disorders
6A2Y	Other specified primary psychotic disorder

6A70–6A8Z

Mood (affective) disorders

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Includes depressive disorders and bipolar disorders. It is one of the most consulted blocks due to its high clinical prevalence. Episodic depressive disorder (6A00) is the most common mental health diagnosis worldwide.

Code	Diagnosis
6A70	Single episode depressive disorder
6A72	Dysthymic disorder
6A73	Mixed depressive and anxiety disorder
GA34.41	Premenstrual dysphoric disorder
6A60	Bipolar type I disorder
6A61	Bipolar type II disorder
6A62	Cyclothymic disorder

Coding note: Depressive and bipolar disorders can be specified with extensions of severity (mild, moderate, severe) and current clinical characteristics (with psychotic symptoms, in remission, etc.) using the extension codes in Chapter X.

6B00–6B0Z

Disorders related to anxiety or fear

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It groups disorders characterized by excessive anxiety, fear or worry. Separated from ICD-10 neurotic disorders, they now have their own block that better reflects current clinical evidence.

Code	Diagnosis
6B00	Generalised anxiety disorder
6B01	Panic disorder
6B02	Agoraphobia
6B03	Specific phobia
6B04	Social anxiety disorder
6B05	Separation anxiety disorder
6B06	Selective mutism

6B20–6B2Z

Obsessive-compulsive disorder and related disorders

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It includes OCD and related disorders characterized by obsessive thoughts and compulsive or repetitive behaviors. New independent block in the ICD-11.

Code	Diagnosis
6B20	Obsessive-compulsive disorder
6B21	Body dysmorphic disorder
6B22	Olfactory reference disorder
6B23	Hypochondriasis
6B24	Hoarding disorder
6B25	Body-focused repetitive behaviour disorders
6B25.0	Trichotillomania

6B40–6B4Z

Disorders specifically related to stress

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Disorders whose onset is directly related to a stressful or traumatic event. It includes PTSD, which in the ICD-11 has a more restrictive and more trauma-focused definition.

Code	Diagnosis
6B40	Post traumatic stress disorder
6B41	Complex post traumatic stress disorder
6B42	Prolonged grief disorder
6B43	Adjustment disorder
6B44	Reactive attachment disorder
6B45	Disinhibited social engagement disorder

6B64–6B6Z

Dissociative disorders

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Disorders characterized by an interruption or discontinuity in the normal integration of consciousness, memory, identity, emotion, perception, behavior, and sense of identity.

Code	Diagnosis
6B64	Dissociative identity disorder
6B65	Partial dissociative identity disorder
6B62	Trance disorder
6B63	Possession trance disorder
6B60	Dissociative neurological symptom disorder
6B61	Dissociative amnesia
6B66	Depersonalization-derealization disorder

6B80–6B8Z

Eating or eating disorders

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It includes anorexia, bulimia, and binge eating disorder, as well as other eating disorders not exclusively related to body image.

Code	Diagnosis
6B80	Anorexia Nervosa
6B81	Bulimia Nervosa
6B82	Binge eating disorder
6B83	Avoidant-restrictive food intake disorder
6B84	Pica
6B85	Rumination-regurgitation disorder

6C00–6C0Z

Elimination disorders

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Disorders characterized by the inappropriate elimination of urine or feces. Common in pediatric age.

Code	Diagnosis
6C00	Enuresis
6C01	Encopresis

6C20–6C2Z

Disruptive or dissocial behavior disorders

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Disorders characterized by persistent disruptive, aggressive, or antisocial behavior. Common in childhood and adolescence.

Code	Diagnosis
6C20	Bodily distress disorder
6C21	Body integrity dysphoria
MB23.1	Antisocial behaviour

6C40–6C4Z

Disorders due to substance use or addictive behaviors

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One of the largest blocks. It includes disorders due to the use of alcohol, cannabis, opioids, stimulants, sedatives, tobacco and other substances, as well as behavioral addictive disorders.

Code	Diagnosis
6C40	Disorders due to use of alcohol
6C41	Disorders due to use of cannabis
6C43	Disorders due to use of opioids
6C4A	Disorders due to use of nicotine
6C50.Z	Gambling disorder, unspecified

6D10.0–6D1Z

Personality disorders and related traits

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The ICD-11 introduces a radical change: instead of fixed personality types (as in the ICD-10), it uses a dimensional model with a severity specifier and prominent trait descriptors.

Code	Diagnosis
6D10.0	Mild personality disorder
6D10.1	Moderate personality disorder
6D10.2	Severe personality disorder
6D11.0	Negative affectivity in personality disorder or personality difficulty
6D11.1	Detachment in personality disorder or personality difficulty
6D11.2	Dissociality in personality disorder or personality difficulty
6D11.3	Disinhibition in personality disorder or personality difficulty
6D11.4	Anankastia in personality disorder or personality difficulty

Major change vs ICD-10: The classic types (paranoid, antisocial, borderline, etc.) no longer exist as separate categories. Severity + prominent features are diagnosed.

6D70–6E0Z

Neurocognitive disorders

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Includes delirium and dementia. In ICD-11 the distinction between "organic" and "non-organic" dementias was eliminated. Alzheimer's disease and other dementias now have their own space without the "organic mental disorder" label.

Code	Diagnosis
6D70	Delirium
6D71	Mild neurocognitive disorder
6D80	Dementia due to Alzheimer disease
6D81	Dementia due to cerebrovascular disease
6D82	Dementia due to Lewy body disease
6D82	Dementia due to Lewy body disease
6D84	Dementia due to psychoactive substances including medications
6D8Z	Dementia, unknown or unspecified cause

Comparison ICD-10 vs ICD-11 — Chapter 06

ICD-11 completely restructures chapter F of ICD-10. The main changes according to the official WHO Reference Guide are:

ICD-10 block	ICD-11 Equivalent
F00–F09 Organic mental disorders	6D70–6E0Z Neurocognitive disorders (not labeled "organic")
F10–F19 Disorders due to psychoactive substances	6C40–6C4Z Disorders due to addictive substances or behaviors
F20–F29 Schizophrenia and delusional disorders	6A20–6A2Z Schizophrenia or other primary psychotic disorders
F30–F39 Mood disorders (affective)	6A60–6A8Z Mood disorders
F40–F48 Neurotic, stress-related and somatoform disorders	6B00 Anxiety/fear · 6B20 OCD · 6B40 Stress · 6B60 Dissociative (separate blocks)
F50–F59 Behavioral syndromes associated with physical factors	6B80 Food · Chapter 07 Sleep · Chapter 17 Sexual health
F60–F69 Personality disorders	6D10–6D1Z Dimensional model (severity + traits)
F70–F79 Mental retardation	6A00 Disorders of intellectual development
F80–F89 Disorders of psychological development	6A00–6A0Z Neurodevelopmental disorders
F90–F98 Disorders of childhood and adolescence	Distributed in neurodevelopment, behavior and other blocks

Coding Guidance

Basic cause of death

According to the WHO Reference Guide, Chapter 06 disorders have specific instructions for mortality coding:

The neurodevelopmental disorders (6A00–6A0Z) should not be used as the underlying cause of death if the underlying physical condition is known. The underlying condition is coded.
The neurocognitive disorders (6D70–6E0Z) should also not be used as a basic cause if the causative physical condition is known.
The nicotine use disorders (6C4A) should not be used as the underlying cause if the resulting physical condition is known (e.g. lung cancer).

Post-coordination and extension codes

The diagnostics in Chapter 06 can be combined with extension codes of Chapter X to specify:

Severity: mild, moderate, severe
Features of the current episode: with psychotic symptoms, in partial remission, in complete remission
Time of diagnosis: present upon entry vs. established after entry

Post-coordination example: An episode of severe depression with psychotic symptoms would be coded by combining the base code 6A70 (Episodic Depressive Disorder) with the extension codes for severe severity and presence of psychosis.

Frequently asked questions

What ICD-11 code corresponds to depression?

6A70 is single episode depressive disorder, 6A71 recurrent depressive disorder, 6A72 dysthymic disorder, and 6A73 mixed depressive and anxiety disorder. The documented course and presentation determine the appropriate category.

What is the ICD-11 code for generalized anxiety?

Generalized anxiety disorder is coded as 6B00 in ICD-11. Panic disorder is 6B01 and agoraphobia is 6B02. In the ICD-10 they belonged to block F41.

What ICD-11 code does schizophrenia have?

Schizophrenia is coded as 6A20 in ICD-11. Schizoaffective disorder is 6A21 and schizotypal disorder is 6A22. In ICD-10 it was F20.

What is the ICD-11 code for ADHD?

ADHD is coded as 6A05 in the ICD-11, within the neurodevelopmental disorders block. In ICD-10 it corresponded to F90.

What happened to autism in ICD-11?

In ICD-11 autism is called Autism spectrum disorder (ASD) with code 6A02. ICD-10 subtypes (F84.0 Autism, F84.1 Atypical Autism, F84.5 Asperger Syndrome) were unified into a single spectral category with specifiers.

How is borderline personality disorder coded in the ICD-11?

Personality disorder is classified by severity: 6D10.0 mild, 6D10.1 moderate and 6D10.2 severe. The additional 6D11.5 borderline pattern qualifier is available when its requirements are met.

Is insomnia still in Chapter 06 of the ICD-11?

No. In ICD-11, sleep disorders were moved to Chapter 07 (Sleep and wakefulness disorders). Insomnia is now coded with codes 7A00–7A0Z, not within Chapter 06.

ℹ️ Source: ICD-11 Reference Guide, February 2023, WHO. Independent information portal. For official clinical coding consult icd.who.int.