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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 Indian Scale for Assessment of Autism (ISAA)?
The Indian Scale for Assessment of Autism (ISAA) is a clinician-administered, India-standardised tool used to assess and describe autism, and is the instrument used officially in India for autism disability certification. It rates a child across domains including social relationships, emotional responses, speech and communication, behaviour patterns, sensory aspects and cognitive components. ISAA is a structured, descriptive map of a child's profile, not a verdict on potential, and is always used by a trained professional as part of a wider developmental evaluation.
Read the answer AnswerWhat is the IPRS, and what does it assess?
The IPRS is a structured rating-scale instrument used by trained professionals to record, in a consistent way, how a child is functioning across observed areas such as communication, social interaction, attention and behaviour, daily-living skills and motor function. It is a measurement lens, not a diagnosis on its own — always interpreted by a qualified clinician alongside the wider picture of the child, and useful for understanding a profile and tracking change over time.
Read the answer AnswerWhat is the MacArthur–Bates Communicative Development Inventories (CDI)?
The MacArthur–Bates Communicative Development Inventories (CDI) are parent-report questionnaires that measure a young child's early communication — typically from around 8 months to 3 years. Because parents complete them from everyday life, they capture real-world skills: words understood, words said, gestures, and early word combinations. The CDI is a screening and research tool, not a diagnosis; a low score is an invitation to look more closely with a professional.
Read the answer AnswerWhat is the Miller Function & Participation Scales (M-FUN)?
The Miller Function & Participation Scales (M-FUN) is a standardised, play-based assessment used by occupational therapists to understand how a young child's motor skills support everyday participation at home, in play and at school. It examines fine-motor, gross-motor and visual-motor abilities, and uniquely links them to participation observations from parents and teachers. It is not a diagnosis but one tool, interpreted by a qualified clinician alongside history and observation, to map strengths and gentle areas of need.
Read the answer AnswerWhat is the M-CHAT-R/F and what does it assess?
The M-CHAT-R/F is a free, parent-completed screening questionnaire for toddlers aged about 16–30 months that asks simple questions about play, pointing, eye contact, gestures and responding to others. It is a two-step tool — a checklist followed by a structured follow-up interview — designed to flag children who may benefit from a fuller developmental assessment. It is a screen, not a diagnosis; many children who screen positive are not autistic, and the AAP recommends routine autism screening at the 18- and 24-month visits.
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