# What is ADHD, and what are its ICD-11 features in early childhood?

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

ADHD (ICD-11 6A05) is a neurodevelopmental disorder of persistent, impairing inattention and/or hyperactivity-impulsivity, pervasive across settings and inconsistent with developmental level. In early childhood the hyperactive-impulsive profile predominates and diagnosis is conservative, prioritising cross-setting impairment over symptom counts.

*A toddler who never stops moving may worry a parent — but in early childhood, ADHD is a diagnosis made with caution and care.*

## In short
Attention deficit hyperactivity disorder (**ICD-11 6A05**) is a neurodevelopmental disorder defined by a persistent pattern of inattention and/or hyperactivity-impulsivity that is **directly impairing**, present across multiple settings (home, childcare, with relatives), and inconsistent with the child's developmental level. ICD-11 typically requires onset before adulthood with symptoms evident over an extended period. In children under 5–6 years, presentation is dominated by the **hyperactive-impulsive** profile, and diagnosis is deliberately conservative because high activity and short attention are developmentally normal in toddlers.

## The science, briefly
ICD-11 6A05 specifies three presentations — predominantly inattentive (6A05.0), predominantly hyperactive-impulsive (6A05.1), and combined (6A05.2). In early childhood, clinicians weigh **pervasiveness across settings** and functional impairment over symptom counts alone, distinguishing ADHD from age-typical exuberance, expressive language delay, hearing loss, sleep disruption and global developmental delay. NICE NG87 advises against rushing to label preschoolers and supports parent-training and environmental approaches first; AAP and IAP similarly emphasise multi-informant observation over time before considering pharmacotherapy in the very young.

## The Pinnacle way
A clinical [AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from a checklist or app. Our multidisciplinary teams profile attention, regulation and function across real settings before any [behavioural-therapy](/behavioural-therapy) plan. Explore the [ADHD pathway](/adhd) for staged, family-led support.

## Trusted sources
WHO ICD-11 6A05; CDC developmental milestones; NICE NG87; AAP HealthyChildren; Indian Academy of Pediatrics.

**Next step —** Refer a young child with persistent, cross-setting attention or activity concerns for a structured developmental assessment at a Pinnacle centre.

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

## Sources
- WHO ICD-11 6A05 · Attention deficit hyperactivity disorder: https://icd.who.int/browse11
- CDC — Learn the Signs. Act Early.: https://www.cdc.gov/child-development
- NICE NG87 — ADHD diagnosis & management: https://www.nice.org.uk/guidance/ng87
- AAP — HealthyChildren.org: https://www.healthychildren.org

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Doctor: https://pinnacleblooms.org/ask/lens/stakeholder/doctor
- Cognitive: https://pinnacleblooms.org/ask/lens/domain/cognitive
- 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
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- What is ADHD?: https://pinnacleblooms.org/ask/what-is-adhd
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### Explore causes & influences
- Contributing factors for ADHD in early childhood: https://pinnacleblooms.org/ask/what-are-the-known-contributing-factors-for-adhd-in-early-childhood
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### Understand assessment
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