Selective Mutism
Selective Mutism: ICD-11 Features in Early Childhood
Selective Mutism (ICD-11 6B06) is an anxiety and fear-related disorder defined by consistent failure to speak in specific social situations despite normal speech elsewhere, persisting beyond one month with functional impact, and not explained by language unfamiliarity or a communication disorder.
A child who speaks freely at home yet falls silent at school is not being defiant — they are caught in a specific, treatable anxiety pattern.
In short
Selective Mutism (ICD-11 6B06) is a consistent failure to speak in specific social situations where speech is expected — typically school or with unfamiliar adults — despite speaking normally in other settings, usually the home. It is classified within anxiety and fear-related disorders, not as a communication or language disorder. The child can speak; situational anxiety blocks it.The clinical picture
Under ICD-11, the core features in early childhood are:- Selectivity — fluent, age-appropriate speech in comfortable settings (home, with close family) but consistent muteness in specific contexts.
- Duration and persistence — the pattern endures at least one month, extending beyond the normal settling-in period of starting nursery or school.
- Functional impact — interference with educational participation, social interaction or daily functioning.
- Exclusions — not better explained by a lack of familiarity with the spoken language required, and not attributable to a communication disorder (e.g. childhood-onset fluency disorder) or to a neurodevelopmental or psychotic disorder.
Onset is typically between ages 2 and 5, often first identified when formal schooling begins. High comorbidity with social anxiety and behavioural inhibition is well documented. Differentiate from transient situational reticence, hearing impairment, and language-exposure effects in multilingual children.
The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online tool. Our pathway combines graded-exposure behavioural work with speech therapy and family coaching across selective mutism support, anchored by the clinician-administered AbilityScore®.Trusted sources
WHO ICD-11 Mortality and Morbidity Statistics (6B06); ASHA guidance on selective mutism; AAP developmental and behavioural resources.Next step — Refer the family for a structured developmental and anxiety assessment at a Pinnacle centre.
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
What to watch
Fluent speech at home but consistent muteness at school or with unfamiliar adults, persisting beyond one month and beyond the settling-in period, with impact on educational or social participation.
Try this at home
Reassure parents not to pressure the child to speak; reduced demand and graded, low-anxiety exposure support speech far better than coaxing.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
Is Selective Mutism a speech disorder?
No. Under ICD-11 it sits within anxiety and fear-related disorders. The child has intact speech and language ability but is unable to speak in specific anxiety-provoking situations.
At what age does Selective Mutism typically present?
Onset is usually between 2 and 5 years, and it is frequently first recognised when the child begins nursery or formal schooling and the contrast with home speech becomes apparent.
How long must symptoms persist for the ICD-11 pattern?
The failure to speak in specific settings should persist for at least one month and extend beyond the normal initial settling-in period of starting school.