Childhood Apraxia of Speech
Childhood Apraxia of Speech: ICD-11 features in early childhood
Childhood Apraxia of Speech is a paediatric motor speech-planning disorder coded under ICD-11-MMS 6A01.0 (developmental speech sound disorder). Its consensus features are inconsistent errors on repeated productions, disrupted coarticulatory transitions, and inappropriate prosody, in the absence of neuromuscular weakness — distinguishing it from dysarthria and phonological disorder.
A child who knows exactly what they want to say but cannot reliably make their mouth produce it — that inconsistency is the signature of apraxia.
In short
Childhood Apraxia of Speech (CAS) is a paediatric motor speech disorder in which the precision and consistency of movements underlying speech are impaired in the absence of neuromuscular weakness. In ICD-11-MMS it is coded under 6A01.0 Developmental speech sound disorder, within the developmental speech or language disorders grouping. The deficit is one of planning and programming the spatiotemporal parameters of speech movement sequences, not of muscle tone or strength.The science, briefly
Three consensus features distinguish CAS from other speech sound disorders: (1) inconsistent errors on repeated productions of the same syllables or words; (2) lengthened and disrupted coarticulatory transitions between sounds and syllables; and (3) inappropriate prosody, particularly in lexical or phrasal stress. In early childhood you may also observe groping articulatory behaviours, a restricted consonant and vowel repertoire, vowel distortions, and errors that increase with utterance length and complexity. ICD-11 frames developmental speech sound disorder as a persistent difficulty acquiring accurate, intelligible speech that is not attributable to hearing impairment, structural anomaly or a neurological condition acquired after the developmental period. Differentiation from dysarthria (a neuromuscular execution deficit) and phonological disorder (a linguistic, rule-based pattern) is essential before targeting motor-based intervention.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 app or checklist. Our SLPs use repeated, structured motor-speech sampling to characterise consistency and prosody before planning intensive, motor-based speech therapy. Explore the full Childhood Apraxia of Speech profile and how the AbilityScore® is established.Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics (developmental speech sound disorder); ASHA consensus on the clinical features of Childhood Apraxia of Speech.Next step — Refer a child with inconsistent, effortful, prosodically atypical speech for a Pinnacle motor-speech evaluation.
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
Inconsistent errors on repeated attempts at the same word, lengthened or disrupted transitions between sounds and syllables, atypical lexical or phrasal stress, articulatory groping, and errors that worsen as utterance length increases.
Try this at home
When sampling speech, ask the child to repeat the same word several times — true motor-planning inconsistency, not a stable error pattern, is the clue that points toward apraxia rather than a phonological disorder.
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
What ICD-11 code applies to Childhood Apraxia of Speech?
CAS is classified under ICD-11-MMS 6A01.0, Developmental speech sound disorder, within the developmental speech or language disorders grouping. ICD-11 frames this as a persistent difficulty acquiring accurate, intelligible speech not attributable to hearing impairment, structural anomaly or an acquired neurological condition.
How is CAS distinguished from dysarthria and phonological disorder?
Dysarthria reflects a neuromuscular execution deficit (weakness, tone or coordination); phonological disorder is a linguistic, rule-based pattern with consistent errors. CAS is a motor planning and programming deficit marked by inconsistent errors, disrupted coarticulatory transitions and inappropriate prosody, without neuromuscular weakness.
What are the three consensus features of CAS?
Inconsistent errors on repeated productions of the same syllables or words; lengthened and disrupted coarticulatory transitions between sounds and syllables; and inappropriate prosody, particularly in lexical or phrasal stress.