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ICD-11 Classification for Intellectual Disability (6A00)
In ICD-11-MMS, Intellectual Disability is classified as 6A00, Disorders of Intellectual Development, under Neurodevelopmental Disorders. It is defined by significantly below-average intellectual and adaptive functioning originating in the developmental period, with severity coded mild, moderate, severe or profound, plus provisional categories where standardised testing is not yet feasible.
Read the answer AnswerICD-11 Classification for Motor Planning Difficulties
Motor planning difficulties are a functional descriptor, not a standalone ICD-11 term. They map to ICD-11 6A04 Developmental Motor Coordination Disorder within the neurodevelopmental disorders block, with praxis-related limitations also codable under the WHO ICF functioning lens.
Read the answer AnswerICD-11 Classification for Non-Verbal / Minimally Verbal Presentation
"Non-verbal" and "minimally verbal" are functional descriptors of expressive communication, not ICD-11 diagnoses. ICD-11 codes the underlying condition (e.g. 6A02 autism with the functional-language qualifier, 6A00 disorders of intellectual development, or 6A01.1 developmental language disorder) on the diagnostic axis, while the WHO ICF framework describes the degree of spoken-language limitation and its impact.
Read the answer AnswerICD-11 Classification of Oppositional Defiant Disorder (6C90)
In ICD-11-MMS, Oppositional Defiant Disorder is coded 6C90 within disruptive behaviour or dissocial disorders, defined as a persistent (~6-month) pattern of markedly defiant, disobedient or spiteful behaviour beyond age-typical limits, with a specifier for chronic irritability and anger.
Read the answer AnswerWhat is the ICD-11 classification for Persistent Toe-Walking?
ICD-11 has no dedicated code for persistent (idiopathic) toe-walking; it is a gait descriptor captured under MB44 Abnormalities of gait and mobility in Chapter 21. Secondary toe-walking is coded to its underlying cause — cerebral palsy, neuromuscular disorder, contracture or an associated neurodevelopmental condition such as autism (6A02).
Read the answer AnswerICD-11 Classification for Prematurity-Related Developmental Risk
Prematurity-Related Developmental Risk is not a single ICD-11 diagnosis but a risk descriptor. ICD-11 codes the gestational status under the perinatal chapter (KA2x) and codes any developmental sequelae separately as they emerge. The clinical stance is corrected-age developmental surveillance, not premature labelling.
Read the answer AnswerICD-11 Classification of Rett Syndrome (LD90.0)
In ICD-11-MMS, Rett syndrome is classified under code LD90.0 within developmental anomalies of the nervous system. It denotes a monogenic neurodevelopmental disorder, most often caused by MECP2 variants, marked by early normal development followed by regression of hand skills and language, gait abnormalities and stereotypic hand movements.
Read the answer AnswerICD-11 Classification for School Readiness Gap
"School Readiness Gap" is a functional descriptor, not an ICD-11 diagnostic code. It is best mapped through the WHO ICF as a participation/functioning construct, with any underlying condition (e.g. developmental language disorder, ADHD) coded separately under ICD-11 if identified. Treat it as a screening flag warranting structured developmental profiling, not a label.
Read the answer AnswerWhat is the ICD-11 classification for Selective Mutism?
In ICD-11-MMS, Selective Mutism is coded 6B06 and classified within Anxiety or fear-related disorders — reframing it as an anxiety-driven condition marked by consistent failure to speak in specific social settings despite normal speech elsewhere.
Read the answer AnswerWhat is the ICD-11 classification for Self-Regulation Difficulties?
"Self-regulation difficulties" is a functional descriptor, not a single ICD-11 diagnosis. ICD-11 has no standalone "regulation disorder" code; classify by the underlying entity — ADHD (6A05), oppositional defiant disorder (6C90) — and use the ICF to record the regulatory impairment and its functional impact.
Read the answer AnswerICD-11 Classification for Sensory-Based Feeding Selectivity
Sensory-Based Feeding Selectivity is not a discrete ICD-11 entity. When sensory-driven food refusal causes nutritional deficiency, faltering growth, supplement dependence or psychosocial impairment, it is coded under ICD-11-MMS 6B83 Avoidant-restrictive food intake disorder (ARFID). Developmentally typical picky eating without these consequences does not meet the threshold.
Read the answer AnswerWhat is the ICD-11 classification for Sensory Processing Differences?
ICD-11 has no standalone code for Sensory Processing Differences. Sensory reactivity is documented as an associated feature of recognised conditions — notably autism spectrum disorder (6A02) — with functional impact described via the WHO ICF framework rather than a dedicated diagnostic code.
Read the answer AnswerICD-11 Classification of Separation Anxiety Disorder (6B05)
In ICD-11-MMS, Separation Anxiety Disorder is coded 6B05 within the Anxiety or fear-related disorders block. ICD-11 removed the childhood-onset restriction of ICD-10, applying the diagnosis across the lifespan where excessive, persistent separation-related fear causes significant distress or impairment.
Read the answer AnswerICD-11 Classification of Social Communication Difficulties
In ICD-11-MMS, social (pragmatic) communication difficulties are coded at 6A01.22 — Developmental language disorder with impairment of mainly pragmatic language — within 6A01 Developmental language disorder under 6A0 Neurodevelopmental disorders. It applies when pragmatic-language impairment is persistent and not better explained by autism spectrum disorder.
Read the answer AnswerICD-11 Classification for Specific Learning Disability
In ICD-11-MMS, Specific Learning Disability is classified as Developmental learning disorder, code 6A03, under Neurodevelopmental disorders, with subtypes for impairment in reading (6A03.0), written expression (6A03.1) and mathematics (6A03.2). Difficulties must persist at least six months despite intervention and not be better explained by intellectual, sensory or neurological causes.
Read the answer AnswerICD-11 Classification for Speech and Language Delay
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.
Read the answer AnswerICD-11 Classification of Stereotyped Movement Disorder (6A06)
In ICD-11-MMS, Stereotyped Movement Disorder is coded 6A06 within Neurodevelopmental disorders — persistent, repetitive, purposeless motor behaviour beginning in the developmental period, specified with or without self-injury and whether associated with another condition. Diagnosis is established only by a qualified clinician.
Read the answer AnswerICD-11 Classification of Tourette Syndrome
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.
Read the answer AnswerICD-11 Classification for Visual Impairment (9D90)
In ICD-11-MMS, Visual Impairment is classified at 9D90 within the visual system chapter. It is a functioning-based category grading reduced acuity and visual field loss — mild, moderate, severe and blindness — applied to the better eye with best correction, and paired separately with the underlying aetiological diagnosis.
Read the answer AnswerWhat is the Motor area of child development?
The motor area of child development describes how a child learns to move, balance and use their body. It is usually split into gross motor (big movements like crawling, walking and jumping) and fine motor (precise hand and finger movements like pinching and drawing). In the WHO ICF framework it maps to neuromusculoskeletal and movement-related functions (b7). It is a foundation that supports play, learning and independence, and children progress along their own timelines.
Read the answer AnswerWhat is the Sensory area of child development?
The sensory area of child development is how a child takes in and responds to information from their senses — sight, hearing, touch, taste, smell, plus balance and body-awareness. In the WHO ICF framework it sits under sensory functions (b2). It is a foundation for settling, attending, playing and learning. Children vary in how they seek or avoid sensory input, and gentle, playful support — and a review when daily life is affected — helps a child feel comfortable and capable.
Read the answer AnswerWhat is the SNOMED CT concept for ADHD?
In SNOMED CT, ADHD is the concept 'Attention deficit hyperactivity disorder (disorder)', SCTID 406506008, the terminology counterpart to WHO ICD-11 6A05 and ICD-10 F90, with subtype descendants for inattentive, hyperactive-impulsive and combined presentations. Always verify against the active national edition.
Read the answer AnswerSNOMED CT concept for Attachment Difficulties
There is no single canonical SNOMED CT concept for the lay phrase "Attachment Difficulties". Map instead to the specific ICD-11 entities — 6B44 Disinhibited social engagement disorder or 6B43 Reactive attachment disorder — and their SNOMED equivalents (disinhibited / reactive attachment disorder of childhood). Always verify concept IDs against the live SNOMED CT release.
Read the answer AnswerSNOMED CT Concept for Auditory Processing Difficulties
"Auditory processing difficulties" maps in SNOMED CT to the disorder concept Central auditory processing disorder (CAPD). Always confirm the current SCTID and preferred term against a live SNOMED CT International Edition release, and map alongside the relevant WHO ICD-11 entity for classification — SNOMED for clinical recording, ICD for morbidity coding.
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