# ICD-11 Classification of Oppositional Defiant Disorder (6C90)

Canonical: https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-oppositional-defiant-disorder
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

In ICD-11-MMS, Oppositional Defiant Disorder is coded 6C90 within disruptive behaviour or dissocial disorders, defined as a persistent (~6-month) pattern of markedly defiant, disobedient or spiteful behaviour beyond age-typical limits, with a specifier for chronic irritability and anger.

*Clinicians reaching for the right ICD-11 code for ODD need it precise, parent-explicable, and correctly placed in the disruptive-behaviour group — here it is.*

## In short
In **ICD-11-MMS**, Oppositional Defiant Disorder is classified under code **6C90**, within the grouping *Disruptive behaviour or dissocial disorders*. ICD-11 defines it as a persistent pattern (≈6 months or more) of markedly defiant, disobedient, provocative or spiteful behaviour, occurring more frequently than expected for age and developmental level, and not restricted to a single relationship or setting. It is distinguished from age-typical oppositionality by frequency, persistence, severity and functional impairment.

## The classification, in clinical terms
ICD-11 sits 6C90 alongside Conduct-dissocial disorder (6C91) under disruptive behaviour or dissocial disorders. Two features sharpen diagnosis:

- **Specifier for chronic irritability–anger (with chronic irritability and anger):** captures the predominantly angry/irritable mood presentation, the construct that broadly overlaps with disruptive mood dysregulation in DSM-5.
- **Headstrong/oppositional and spiteful/vindictive behaviours** are recognised dimensions of the presentation.

The pattern must exceed normative limits for the child's age, sex and culture, persist over time, and cause distress or impairment in personal, family, social or educational functioning. Diagnosis below early childhood requires caution — transient oppositionality is developmentally normal, so persistence across settings and clear impairment are the discriminating thresholds.

## When to refer
Refer for structured assessment where defiant, hostile or spiteful behaviour is pervasive across home and school, persists beyond ~6 months, and impairs relationships or learning. Screen for co-occurring ADHD, anxiety, language disorder and learning difficulties, which frequently coexist and reshape the management plan.

## The Pinnacle way
Developmental measurement supports care planning; diagnosis requires an appropriately qualified healthcare professional., under qualified clinician care — never from an online form, app or code lookup. Coding orients the conversation; clinician-led, multi-domain assessment defines the plan. Explore [our developmental approach](/), the [behavioural and emotional-regulation support pathway](/behaviour-therapy), and [what the AbilityScore is and how it is calculated](/ask/what-is-the-abilityscore-and-how-is-it-calculated).

## Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics, disruptive behaviour or dissocial disorders chapter; WHO clinical descriptions and diagnostic requirements for mental disorders.

**Next step —** Refer a child with persistent oppositional patterns for [structured, clinician-led assessment](/behaviour-therapy).

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.

## Sources
- WHO ICD-11 for Mortality and Morbidity Statistics: https://icd.who.int/
- World Health Organization — mental and behavioural disorders resources: https://www.who.int/

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Doctor: https://pinnacleblooms.org/ask/lens/stakeholder/doctor
- Social: https://pinnacleblooms.org/ask/lens/domain/social
- Definition: https://pinnacleblooms.org/ask/lens/intent/definition
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Behaviour Therapy: https://pinnacleblooms.org/ask/lens/route/behaviour-therapy
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- Oppositional Defiant Disorder (ICD-11 6C90): clinical definition: https://pinnacleblooms.org/ask/what-is-oppositional-defiant-disorder-and-what-are-its-icd-11-features-in-early-childhood
- ICD-11 Classification of Conduct-Dissocial Disorder (6C91): https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-conduct-dissocial-disorder
- What is Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-is-oppositional-defiant-disorder
- What is the SNOMED CT concept for Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-oppositional-defiant-disorder
- How Oppositional Defiant Disorder affects a child's daily life: https://pinnacleblooms.org/ask/how-does-oppositional-defiant-disorder-affect-a-child-s-daily-life
- Is Oppositional Defiant Disorder considered a disability?: https://pinnacleblooms.org/ask/is-oppositional-defiant-disorder-considered-a-disability
- Is Oppositional Defiant Disorder genetic or hereditary?: https://pinnacleblooms.org/ask/is-oppositional-defiant-disorder-genetic-or-hereditary
- Common myths about Oppositional Defiant Disorder: https://pinnacleblooms.org/ask/what-are-common-myths-about-oppositional-defiant-disorder
- What are the types or levels of Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-are-the-types-or-levels-of-oppositional-defiant-disorder
- What causes Oppositional Defiant Disorder in children?: https://pinnacleblooms.org/ask/what-causes-oppositional-defiant-disorder-in-children
- Early Intervention Outcomes for ODD in Children Under 7: https://pinnacleblooms.org/ask/what-does-current-research-show-about-early-intervention-outcomes-for-oppositional-defiant-disorder-in-children-under-7
- What is Oppositional Defiant Disorder, and what does it look like in early childhood?: https://pinnacleblooms.org/ask/what-is-oppositional-defiant-disorder-and-what-does-it-look-like-in-early-childhood

### Recognise signs & concerns
- Early indicators of Oppositional Defiant Disorder for paediatricians: https://pinnacleblooms.org/ask/what-early-indicators-of-oppositional-defiant-disorder-should-a-paediatrician-watch-for
- Clinical Red Flags for ODD Warranting Referral: https://pinnacleblooms.org/ask/what-clinical-red-flags-for-oppositional-defiant-disorder-warrant-referral-in-a-young-child
- When to Refer Suspected ODD for Developmental Therapy: https://pinnacleblooms.org/ask/when-should-a-doctor-refer-a-child-with-suspected-oppositional-defiant-disorder-for-developmental-therapy
- Can Oppositional Defiant Disorder be cured?: https://pinnacleblooms.org/ask/can-oppositional-defiant-disorder-be-cured
- Can Oppositional Defiant Disorder be prevented?: https://pinnacleblooms.org/ask/can-oppositional-defiant-disorder-be-prevented
- Do boys show Oppositional Defiant Disorder differently?: https://pinnacleblooms.org/ask/do-boys-show-oppositional-defiant-disorder-differently
- Do girls show Oppositional Defiant Disorder differently?: https://pinnacleblooms.org/ask/do-girls-show-oppositional-defiant-disorder-differently
- How a Frontline Health Worker Can Spot Possible ODD Early: https://pinnacleblooms.org/ask/how-can-a-frontline-health-worker-spot-a-child-with-possible-oppositional-defiant-disorder-early
- Should I be worried my child might have Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-oppositional-defiant-disorder
- What are the early signs of Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-oppositional-defiant-disorder
- Early Signs of ODD in a 1-Year-Old Boy: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-oppositional-defiant-disorder-in-a-1-year-old-boy
- Early Signs of Oppositional Defiant Disorder in a 1-Year-Old Girl: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-oppositional-defiant-disorder-in-a-1-year-old-girl

### Explore causes & influences
- Contributing Factors for ODD in Early Childhood: https://pinnacleblooms.org/ask/what-are-the-known-contributing-factors-for-oppositional-defiant-disorder-in-early-childhood
- Are boys more likely to have Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/are-boys-more-likely-to-have-oppositional-defiant-disorder
- Are girls more likely to have Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/are-girls-more-likely-to-have-oppositional-defiant-disorder
- Early Intervention for ODD: Advancing UNCRPD & the SDGs: https://pinnacleblooms.org/ask/how-does-early-intervention-for-oppositional-defiant-disorder-advance-un-child-rights-uncrpd-and-the-sdgs
- What Causes Oppositional Defiant Disorder in Young Children?: https://pinnacleblooms.org/ask/what-causes-oppositional-defiant-disorder-in-young-children
- Cost-effectiveness of early therapy for Oppositional Defiant Disorder: https://pinnacleblooms.org/ask/what-is-the-cost-effectiveness-of-early-therapy-for-oppositional-defiant-disorder-in-young-children
- Oppositional Defiant Disorder in India: Prevalence and Public-Health Burden: https://pinnacleblooms.org/ask/what-is-the-prevalence-and-public-health-burden-of-oppositional-defiant-disorder-among-young-children-in-india

### Understand assessment
- Standardised tools to assess ODD in early childhood: https://pinnacleblooms.org/ask/which-standardised-tools-are-used-to-assess-oppositional-defiant-disorder-in-early-childhood
- ODD Screening and Diagnostic Pathway Under 7: https://pinnacleblooms.org/ask/what-is-the-recommended-screening-and-diagnostic-pathway-for-oppositional-defiant-disorder-in-children-under-7
- How AbilityScore Tracks Progress in Oppositional Defiant Disorder: https://pinnacleblooms.org/ask/how-does-abilityscore-track-progress-in-a-child-with-oppositional-defiant-disorder
- How Oppositional Defiant Disorder Is Assessed in a Young Child: https://pinnacleblooms.org/ask/how-is-oppositional-defiant-disorder-assessed-in-a-young-child
- How is Oppositional Defiant Disorder assessed in children under 7?: https://pinnacleblooms.org/ask/how-is-oppositional-defiant-disorder-assessed-in-children-under-7
- What does an AbilityScore of 0–100 mean for a child with Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-0-100-mean-for-a-child-with-oppositional-defiant-disorder
- What an AbilityScore of 100–200 Means for a Child with ODD: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-100-200-mean-for-a-child-with-oppositional-defiant-disorder
- AbilityScore 200–300 and Oppositional Defiant Disorder: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-200-300-mean-for-a-child-with-oppositional-defiant-disorder
- What an AbilityScore® of 300–400 Means for a Child with ODD: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-300-400-mean-for-a-child-with-oppositional-defiant-disorder
- AbilityScore 400–500 in Oppositional Defiant Disorder: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-400-500-mean-for-a-child-with-oppositional-defiant-disorder
- What an AbilityScore of 500–600 Means for a Child with ODD: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-500-600-mean-for-a-child-with-oppositional-defiant-disorder
- What does an AbilityScore of 600–700 mean for a child with Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-600-700-mean-for-a-child-with-oppositional-defiant-disorder

### Explore therapy & support
- Supporting a Child with ODD Day to Day: https://pinnacleblooms.org/ask/as-a-grandparent-or-caregiver-how-can-i-support-a-child-with-oppositional-defiant-disorder-day-to-day
- Can a child with Oppositional Defiant Disorder attend a mainstream school?: https://pinnacleblooms.org/ask/can-a-child-with-oppositional-defiant-disorder-attend-a-mainstream-school
- Can a Child With ODD Attend a Regular School?: https://pinnacleblooms.org/ask/can-a-child-with-oppositional-defiant-disorder-attend-a-regular-school
- Can a Child with ODD Grow Up to Live Independently?: https://pinnacleblooms.org/ask/can-a-child-with-oppositional-defiant-disorder-grow-up-to-live-independently
- How a classroom teacher can help a child with ODD participate and learn: https://pinnacleblooms.org/ask/how-can-a-classroom-teacher-help-a-child-with-oppositional-defiant-disorder-take-part-and-learn
- Supporting Under-7s with Oppositional Defiant Disorder in District Programmes: https://pinnacleblooms.org/ask/how-can-a-district-early-intervention-programme-identify-and-support-children-under-7-with-oppositional-defiant-disorder
- Including a child with ODD in a mainstream classroom: https://pinnacleblooms.org/ask/how-can-a-teacher-include-and-support-a-young-child-with-oppositional-defiant-disorder-in-a-mainstream-classroom
- Supporting Social Development with Oppositional Defiant Disorder: https://pinnacleblooms.org/ask/how-can-we-support-social-development-in-a-child-with-oppositional-defiant-disorder
- How Therapy Helps a Child With Oppositional Defiant Disorder Make Progress: https://pinnacleblooms.org/ask/how-does-therapy-help-a-child-with-oppositional-defiant-disorder-make-progress
- How Is Oppositional Defiant Disorder Diagnosed in a Child?: https://pinnacleblooms.org/ask/how-is-oppositional-defiant-disorder-diagnosed-in-a-child
- How is Oppositional Defiant Disorder supported through therapy?: https://pinnacleblooms.org/ask/how-is-oppositional-defiant-disorder-supported-through-therapy
- Your Child's AbilityScore and ODD: What to Do Next: https://pinnacleblooms.org/ask/my-child-with-oppositional-defiant-disorder-has-an-abilityscore-of-0-100-what-should-we-do-next

### At home & in everyday life
- How can I support my child with Oppositional Defiant Disorder at home?: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-oppositional-defiant-disorder-at-home