# ICD-11 Classification of Tourette Syndrome

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

In ICD-11-MMS, Tourette Syndrome is coded 8A05.00 within the parent category 8A05 Tic disorders. ICD-11 places tic disorders in Diseases of the nervous system (Chapter 08) with secondary parenting under neurodevelopmental disorders, requiring multiple motor tics plus at least one phonic tic, persistent over a year with childhood onset.

*A precise diagnostic code is the foundation of every shared-care conversation — here is exactly where Tourette Syndrome sits in ICD-11.*

## In short
In the WHO **ICD-11-MMS**, Tourette Syndrome carries the code **8A05.00**, sitting within the parent category **8A05 *Tic disorders***. ICD-11 has relocated tic disorders from the older mental-and-behavioural grouping into **Diseases of the nervous system (Chapter 08)**, while retaining a cross-listing with neurodevelopmental disorders — a deliberate reflection of its neurodevelopmental nature. The diagnosis requires both multiple motor tics and at least one phonic (vocal) tic, present for over a year with onset in childhood or adolescence.

## The classification, in detail
Under **8A05 Tic disorders**, ICD-11 distinguishes:
- **8A05.00 Tourette syndrome** — combined chronic motor and phonic tics meeting the duration and onset criteria.
- Related sibling categories for chronic motor-only or phonic-only tic disorders and transient/developmental tic presentations.

Key ICD-11 features worth noting for peer-to-peer use:
- **Multi-parenting**: 8A05 is anchored in the nervous-system chapter yet secondary-parented under neurodevelopmental disorders, so the code surfaces from either pathway.
- **Onset and course**: childhood onset, characteristic waxing-and-waning course, frequent attenuation by adulthood.
- **Comorbidity coding**: ADHD (6A05) and obsessive-compulsive disorder (6B20) are commonly co-occurring and should be coded separately where present, as they often drive functional impairment more than the tics themselves.

This contrasts with ICD-10, where Tourette sat under F95.2 within behavioural and emotional disorders — the ICD-11 move signals the consensus shift toward a neurodevelopmental framing.

## When to refer
Refer for structured developmental and neurological assessment where tics are persistent (>12 months), cause functional or social impairment, or co-occur with attentional, obsessive-compulsive or emotional-regulation difficulties. Sudden-onset, explosive, or focal-neurological presentations warrant prompt neurology review rather than therapy-first pathways.

## The Pinnacle way
AbilityScore® 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. For a child with tics and co-occurring profiles, our [behavioural and developmental therapy pathways](/behavioural-therapy) and a [clinician-administered AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) translate the diagnostic picture into a measurable, family-ready plan. [Partner with Pinnacle](/) for shared-care across 70+ centres.

## Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics, tic disorders category; WHO classification framework for neurodevelopmental and nervous-system disorders.

**Next step —** Refer a child with persistent tics for structured assessment — [connect with a Pinnacle clinical team](/).

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 — classification frameworks: https://www.who.int/

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Doctor: https://pinnacleblooms.org/ask/lens/stakeholder/doctor
- Motor: https://pinnacleblooms.org/ask/lens/domain/motor
- Definition: https://pinnacleblooms.org/ask/lens/intent/definition
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Screen: https://pinnacleblooms.org/ask/lens/route/screen
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

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### Understand assessment
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### At home & in everyday life
- How can I support my child with Tourette Syndrome at home?: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-tourette-syndrome-at-home