Speech and Language Delay
ICD-11 Classification of Speech and Language Delay (6A01)
In ICD-11-MMS, speech and language delay is classified under code 6A01 — Developmental speech or language disorders, within neurodevelopmental disorders. It encompasses speech sound disorder (6A01.0), speech fluency disorder (6A01.1) and developmental language disorder (6A01.2), distinguishing a true developmental disorder from transient variation.
Behind a parent's worry about "late talking" sits a precise clinical question — where does speech and language delay actually sit in ICD-11?
In short
In ICD-11-MMS, what is colloquially called speech and language delay is classified under 6A01 — Developmental speech or language disorders, within the broader grouping of neurodevelopmental disorders (6A0). The code captures persistent difficulties in acquiring, producing or understanding speech and language that begin in the developmental period and are not better accounted for by hearing loss, another sensory deficit, intellectual developmental disorder or a global delay. ICD-11 deliberately distinguishes a true developmental disorder from transient or expected variation — so "delay" is a presenting concern, while 6A01 is the diagnostic classification.The classification, in detail
The 6A01 block resolves into clinically meaningful subtypes, which is the practical value of ICD-11 over a single "delay" label:- 6A01.0 Developmental speech sound disorder — difficulty with articulation/phonology beyond age expectation.
- 6A01.1 Developmental speech fluency disorder — disruption of normal fluency and timing (stuttering).
- 6A01.2 Developmental language disorder, with subtypes specifying impairment of receptive and expressive language, mainly expressive, mainly pragmatic, or other specified profiles.
Diagnosis requires that the difficulty falls substantially below the expected level for age, emerges in the developmental period, and produces functional limitation — and that hearing impairment and other neurological or intellectual conditions have been considered. ICD-11 sits alongside the WHO ICF functioning framework, so the code names the condition while functional profiling describes its day-to-day impact.
When to refer
Refer for structured speech-language assessment rather than "watchful waiting" when there is no babble or gesture by 12 months, no single words by 16 months, no two-word phrases by 24 months, any loss of previously acquired words, or persistent parental concern. Always rule out hearing loss first via audiology.The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from a code, a checklist or an app. Coding informs the clinical picture; it does not replace assessment. Explore how we support speech and language development, how the AbilityScore® is established, and [begin a developmental review](/).Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics, code 6A01 (developmental speech or language disorders); CDC developmental milestone guidance; Indian Academy of Pediatrics; American Academy of Pediatrics (HealthyChildren.org); RBSK developmental screening framework.Next step — Refer or review a child with persistent speech-language concerns at a Pinnacle Blooms Network centre for structured, clinician-led assessment.
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
Persistent difficulty below age expectation in speech production, fluency or language comprehension/expression, beginning in the developmental period and not explained by hearing loss or global delay.
Try this at home
Before attributing late talking to a disorder, confirm hearing has been formally tested — undetected otitis media or sensorineural loss is the most common reversible mimic.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10 · reviewed every 365 days
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 is the exact ICD-11 code for speech and language delay?
It is classified under 6A01 — Developmental speech or language disorders — in the ICD-11-MMS, within the neurodevelopmental disorders grouping (6A0).
Does ICD-11 use the term 'delay' or 'disorder'?
ICD-11 codes the condition as a developmental speech or language *disorder* (6A01). 'Delay' is a presenting concern; the formal classification requires functional impairment beginning in the developmental period and exclusion of other causes such as hearing loss.
What are the subtypes under 6A01?
Developmental speech sound disorder (6A01.0), developmental speech fluency disorder (6A01.1) and developmental language disorder (6A01.2), the latter with receptive-expressive, mainly expressive and pragmatic profiles.
Should every late-talking child be coded under 6A01?
No. Diagnosis requires performance substantially below age expectation with functional limitation, after considering hearing loss, intellectual developmental disorder and global delay. Hearing should be formally assessed first.