{"h1":"ICD-11 Classification of Conduct-Dissocial Disorder (6C91)","faq":[{"a":"It is 6C91 in the ICD-11 Mortality and Morbidity Statistics (MMS), within the grouping 6C9 Disruptive behaviour or dissocial disorders, under Mental, behavioural or neurodevelopmental disorders.","q":"What is the ICD-11 code for Conduct-Dissocial Disorder?"},{"a":"Both sit within grouping 6C9, but Oppositional defiant disorder (6C90) centres on persistent defiance, irritability and argumentativeness, whereas Conduct-dissocial disorder (6C91) involves a repetitive pattern that violates others' basic rights or major societal norms — aggression, destruction, deceit or serious rule violation.","q":"How does ICD-11 distinguish Conduct-Dissocial Disorder from Oppositional Defiant Disorder?"},{"a":"ICD-11 uses onset qualifiers (childhood vs adolescent onset), course descriptors, and a specifier of limited prosocial emotions (callous-unemotional traits), which carries prognostic significance and informs intervention planning.","q":"What qualifiers does ICD-11 add to 6C91?"},{"a":"No. The code supports classification, but diagnosis requires a qualified clinician's structured assessment. At Pinnacle Blooms Network, any clinical AbilityScore® and diagnosis are formed only at a centre under clinician care.","q":"Is a diagnosis of Conduct-Dissocial Disorder made from the ICD-11 code alone?"}],"lang":"en","slug":"what-is-the-icd-11-classification-for-conduct-dissocial-disorder","title":"ICD-11 Classification of Conduct-Dissocial Disorder (6C91)","entity":{"key":"conduct-dissocial","kind":"condition","name":"Conduct-Dissocial Disorder","slug":null},"lenses":[{"kind":"stakeholder","label":"Doctor","value":"doctor"},{"kind":"domain","label":"Social","value":"social"},{"kind":"intent","label":"Definition","value":"definition"},{"kind":"lifecycle","label":"Screen","value":"screen"},{"kind":"route","label":"Behaviour-Therapy","value":"behaviour-therapy"},{"kind":"empowerment","label":"Early Clarity","value":"early_clarity"}],"parent":{"key":"conditions","label":"Conditions"},"related":[{"lang":"en","slug":"what-is-the-icd-11-classification-for-oppositional-defiant-disorder","title":"ICD-11 Classification of Oppositional Defiant Disorder (6C90)"},{"lang":"en","slug":"what-is-conduct-dissocial-disorder","title":"Conduct-Dissocial Disorder Explained for Parents"},{"lang":"en","slug":"what-is-conduct-dissocial-disorder-and-what-are-its-icd-11-features-in-early-childhood","title":"Conduct-Dissocial Disorder (ICD-11 6C91): Early-Childhood Features"},{"lang":"en","slug":"what-is-conduct-dissocial-disorder-and-what-does-it-look-like-in-early-childhood","title":"What is Conduct-Dissocial Disorder, and what does it look like in early childhood?"},{"lang":"en","slug":"what-are-the-early-signs-of-conduct-dissocial-disorder","title":"Early Signs of Conduct-Dissocial Disorder"},{"lang":"en","slug":"what-is-the-snomed-ct-concept-for-conduct-dissocial-disorder","title":"What is the SNOMED CT concept for Conduct-Dissocial Disorder?"}],"summary":"ICD-11 (MMS) classifies Conduct-Dissocial Disorder as 6C91, within the grouping 6C9 Disruptive behaviour or dissocial disorders, under Mental, behavioural or neurodevelopmental disorders. It denotes a persistent pattern violating others' rights or major societal norms, with onset, course and limited-prosocial-emotions qualifiers.","answer_md":"*Behind a referral for persistent rule-breaking and aggression sits a precise ICD-11 grouping — knowing exactly where 6C91 sits sharpens both formulation and care planning.*\n\n## In short\nIn ICD-11 (MMS), **Conduct-Dissocial Disorder is coded 6C91**, situated within the grouping **Disruptive behaviour or dissocial disorders** (6C9), under the broader chapter of **Mental, behavioural or neurodevelopmental disorders**. It is defined by a repetitive, persistent pattern of behaviour that violates the basic rights of others or major age-appropriate societal norms, rules or laws — clearly beyond ordinary childhood mischief and sustained over time.\n\n## The classification in detail\nWithin the 6C9 grouping, ICD-11 distinguishes **6C90 Oppositional defiant disorder** from **6C91 Conduct-dissocial disorder**. The 6C91 pattern includes aggression toward people or animals, destruction of property, deceitfulness or theft, and serious violations of rules, typically enduring **12 months or more**.\n\nICD-11 replaces the older ICD-10 childhood/adolescent-onset split with **onset and course qualifiers** and a clinically important specifier of **limited prosocial emotions** (callous-unemotional traits) — lack of remorse, shallow affect, unconcern about performance — which carries prognostic weight. Subtype and age-of-onset qualifiers (childhood vs adolescent onset) further refine the formulation. Differential consideration should exclude oppositional defiant disorder, ADHD-driven impulsivity, mood or trauma-related presentations, and autism-spectrum behavioural patterns before the 6C91 code is applied.\n\n## When to refer\nRefer for structured assessment when aggressive, deceitful or rule-violating behaviour is **pervasive across settings**, persistent over months, and disproportionate to developmental stage — particularly with co-occurring ADHD, learning difficulties, or adverse childhood experiences, where early multimodal intervention measurably improves trajectory.\n\n## The Pinnacle way\nAbilityScore® is part of Pinnacle’s developmental assessment. Diagnosis, where needed, requires an appropriately qualified healthcare professional — never from a code lookup or an online form. Our teams use a clinician-administered structured assessment to map functioning across communication, cognition, social and emotional-regulation domains before any classification is confirmed. Explore [how the AbilityScore® is established](/ask/what-is-the-abilityscore-and-how-is-it-calculated), our [behavioural and developmental therapy pathways](/behavioural-therapy), and [the Pinnacle network](/).\n\n## Trusted sources\nWHO ICD-11 for Mortality and Morbidity Statistics, grouping 6C9 Disruptive behaviour or dissocial disorders (icd.who.int); WHO clinical descriptions and diagnostic requirements for mental, behavioural and neurodevelopmental disorders.\n\n**Next step —** Reviewing a child with disruptive-behaviour concerns? [Refer to a Pinnacle clinician for structured assessment](/behavioural-therapy).\n\nThis is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.","canonical":"https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-conduct-dissocial-disorder","editorial":{"reviewed_at":"2026-06-11T20:12:18.613642+00:00","reviewed_by":null,"developed_by":"SETU Consortium · Pinnacle Blooms Network"},"alternates":[{"href":"https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-conduct-dissocial-disorder","lang":"en","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"Conduct-Dissocial Disorder: ICD-11 Code 6C91","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"When documenting, capture onset (childhood vs adolescent), pervasiveness across settings, duration, and any limited-prosocial-emotions features — these qualifiers materially shape the ICD-11 formulation and care plan.","published_at":"2026-06-10T10:52:00.07543+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"what-is-conduct-dissocial-disorder-and-what-are-its-icd-11-features-in-early-childhood","title":"Conduct-Dissocial Disorder (ICD-11 6C91): Early-Childhood Features","reason":"Linked from this answer"},{"lang":"en","slug":"what-is-conduct-dissocial-disorder","title":"Conduct-Dissocial Disorder Explained for Parents","reason":"Linked from this answer"},{"lang":"en","slug":"what-is-the-icd-11-classification-for-oppositional-defiant-disorder","title":"ICD-11 Classification of Oppositional Defiant Disorder (6C90)","reason":"Linked from this answer"},{"lang":"en","slug":"what-is-the-snomed-ct-concept-for-conduct-dissocial-disorder","title":"What is the SNOMED CT concept for Conduct-Dissocial Disorder?","reason":"Linked from this 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Home","reason":"Same topic"}],"label":"At home & in everyday life","total":1}],"what_to_watch":"Pervasive, persistent (12+ months) aggression, destructiveness, deceit or rule violation across settings, beyond developmental norms; note limited prosocial emotions (callous-unemotional traits) as a prognostic specifier.","authority_links":[{"url":"https://icd.who.int","code":"6C91","label":"WHO ICD-11 MMS — Disruptive behaviour or dissocial disorders (6C9)"},{"url":"https://www.who.int","label":"WHO — Mental, behavioural and neurodevelopmental disorders"}],"last_reviewed_at":"2026-06-10T10:52:00.07543+00:00","meta_description":"Conduct-Dissocial Disorder is ICD-11 code 6C91, within grouping 6C9 Disruptive behaviour or dissocial disorders. 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