# Oppositional Defiant Disorder (ICD-11 6C90): clinical definition

Canonical: https://pinnacleblooms.org/ask/what-is-oppositional-defiant-disorder-and-what-are-its-icd-11-features-in-early-childhood
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

Oppositional Defiant Disorder (ICD-11 6C90) is a persistent, pervasive pattern of defiant, disobedient, provocative or angry-irritable behaviour exceeding developmental norms and causing impairment. In early childhood it must be distinguished from normative toddler oppositionality, with the chronic irritability-anger qualifier carrying prognostic weight.

*A young child who refuses, argues and erupts is showing a pattern worth naming precisely — and ODD has a specific clinical threshold before that label fits.*

## In short
Oppositional Defiant Disorder (**ICD-11 6C90**) is a persistent pattern of markedly defiant, disobedient, provocative or spiteful behaviour that is **more frequent and severe than developmentally expected**, occurs across a period of at least several months, and causes significant impairment or distress. Crucially, in early childhood it must be distinguished from normative oppositionality — the toddler and preschool defiance that is part of typical autonomy-seeking.

## The clinical picture in early childhood
The ICD-11 description centres on two recurring domains:
- **Persistent angry or irritable mood** — frequent loss of temper, touchiness, resentfulness, being easily annoyed.
- **Argumentative, defiant behaviour** — active defiance of requests and rules, deliberate annoyance of others, blaming others, and in some children, vindictiveness.

A qualifier specifies presentation **with or without chronic irritability–anger**, which carries prognostic weight for later mood pathology. In the early years, anchor judgement to frequency, pervasiveness across settings (home, childcare), and functional impact — not isolated tantrums. Differentiate from ADHD-driven non-compliance, expressive-language frustration, ASD-related rigidity, and reactive responses to adversity. Behaviours confined to one relationship or setting weaken the diagnosis.

## The Pinnacle way
Developmental measurement supports care planning; diagnosis requires an appropriately qualified healthcare professional. under qualified clinician care — never from an online tool. Our teams profile behaviour alongside language, attention and sensory regulation so the formulation reflects the whole child. Explore [Oppositional Defiant Disorder](/oppositional-defiant-disorder), our [behaviour therapy pathway](/behavioral-therapy), and [how the AbilityScore is calculated](/ask/what-is-the-abilityscore-and-how-is-it-calculated).

## Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics, category 6C90; American Academy of Pediatrics guidance on disruptive behaviour in early childhood.

**Next step —** Refer a child for structured behavioural assessment and partner with a Pinnacle clinician on a co-developed plan.

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

## Sources
- WHO ICD-11 MMS — Oppositional Defiant Disorder: https://icd.who.int/browse11
- American Academy of Pediatrics — disruptive behaviour guidance: https://www.aap.org

## 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
- Special Education: https://pinnacleblooms.org/ask/lens/route/special-education
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- What is Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-is-oppositional-defiant-disorder
- 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
- ICD-11 Classification of Oppositional Defiant Disorder (6C90): https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-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 other conditions often occur alongside Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-other-conditions-often-occur-alongside-oppositional-defiant-disorder

### 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
- How Oppositional Defiant Disorder Is Assessed in a Young Child: https://pinnacleblooms.org/ask/how-is-oppositional-defiant-disorder-assessed-in-a-young-child
- 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 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
- What does an AbilityScore of 700–800 mean for a child with Oppositional Defiant Disorder?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-700-800-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