# Dyslexia (Reading Impairment): ICD-11 Definition Canonical: https://pinnacleblooms.org/ask/what-is-dyslexia-reading-impairment-and-what-are-its-icd-11-features-in-early-childhood Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited Dyslexia (ICD-11 6A03.0) is a developmental learning disorder with persistent impairment in reading accuracy, fluency and decoding, below expectation for age and ability, not explained by intellectual disability, sensory deficit or poor instruction. In early childhood it is not yet diagnosed; clinicians monitor phonological precursors and confirm onset in the early school years. *A young reader who decodes far below expectation despite sound teaching and intact ability is the clinical signature of dyslexia — and 6A03.0 names it precisely.* ## In short Dyslexia, coded **6A03.0** under ICD-11 *Developmental learning disorder with impairment in reading*, is a neurodevelopmental disorder marked by persistent difficulties acquiring accurate, fluent reading and word decoding (and often spelling), substantially below the level expected for chronological age and general intellectual functioning. The deficit is not attributable to intellectual disability, sensory impairment (vision or hearing), inadequate instruction, or psychosocial adversity alone. ## The science, briefly The ICD-11 reading impairment specifier captures difficulties in word reading accuracy, reading rate or fluency, and reading comprehension. The core deficit is typically phonological — impaired phonemic awareness, rapid automatised naming, and verbal working memory. In **early childhood**, before formal reading is established, dyslexia is not yet diagnosed; instead clinicians watch precursors: delayed letter–sound knowledge, difficulty rhyming or segmenting sounds, poor naming speed, and a family history of reading difficulty. Diagnostic thresholds require persistence despite targeted intervention, so onset is documented during the early school years (~6–8 years) rather than at preschool. Early identification of these markers enables structured, phonics-based remediation before secondary academic and emotional sequelae set in. ## The Pinnacle way A clinical AbilityScore® and any formal diagnosis are established **only at a Pinnacle Blooms Network centre, by qualified clinicians** — never from an online form. We profile [phonological and literacy precursors](/dyslexia), align targeted [special education and learning support](/special-education), and calibrate progress through [a clinician-administered structured assessment](/ask/what-is-the-abilityscore-and-how-is-it-calculated). ## Trusted sources WHO ICD-11 Mortality and Morbidity Statistics (6A03.0); WHO ICF framework for functioning. **Next step —** Partner with Pinnacle to screen and support early literacy — [refer a child or co-develop a pathway](/dyslexia). This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional. ## Sources - WHO ICD-11 MMS — Developmental learning disorder with impairment in reading: https://icd.who.int/ - WHO ICF framework for functioning: https://www.who.int/standards/classifications/international-classification-of-functioning-disability-and-health ## Connected topics and perspectives - Conditions: https://pinnacleblooms.org/ask/conditions - Doctor: https://pinnacleblooms.org/ask/lens/stakeholder/doctor - Cognitive: https://pinnacleblooms.org/ask/lens/domain/cognitive - Definition: https://pinnacleblooms.org/ask/lens/intent/definition - Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen - Special Education: https://pinnacleblooms.org/ask/lens/route/special-education - Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity ## Related question paths ### Understand the subject - What is Dyslexia (Reading Impairment)?: https://pinnacleblooms.org/ask/what-is-dyslexia-reading-impairment - ICD-11 Classification for Dyslexia (Reading Impairment): https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-dyslexia-reading-impairment - What is Specific Learning Disability, and what are its ICD-11 features in early childhood?: https://pinnacleblooms.org/ask/what-is-specific-learning-disability-and-what-are-its-icd-11-features-in-early-childhood - What is Dyslexia (Reading Impairment) and what does it look like in early childhood?: https://pinnacleblooms.org/ask/what-is-dyslexia-reading-impairment-and-what-does-it-look-like-in-early-childhood - What is the SNOMED CT concept for Dyslexia (Reading Impairment)?: https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-dyslexia-reading-impairment - How Dyslexia Affects a Child's Daily Life: https://pinnacleblooms.org/ask/how-does-dyslexia-reading-impairment-affect-a-child-s-daily-life - Is Dyslexia Considered a Disability?: https://pinnacleblooms.org/ask/is-dyslexia-reading-impairment-considered-a-disability - Is Dyslexia Genetic or Hereditary?: https://pinnacleblooms.org/ask/is-dyslexia-reading-impairment-genetic-or-hereditary - What are common myths about Dyslexia (Reading Impairment)?: https://pinnacleblooms.org/ask/what-are-common-myths-about-dyslexia-reading-impairment - What are the types or levels of Dyslexia?: https://pinnacleblooms.org/ask/what-are-the-types-or-levels-of-dyslexia-reading-impairment - What causes dyslexia in children?: https://pinnacleblooms.org/ask/what-causes-dyslexia-reading-impairment-in-children - Early intervention outcomes for dyslexia under 7: https://pinnacleblooms.org/ask/what-does-current-research-show-about-early-intervention-outcomes-for-dyslexia-reading-impairment-in-children-under-7 ### Recognise signs & concerns - Dyslexia red flags warranting referral in young children: https://pinnacleblooms.org/ask/what-clinical-red-flags-for-dyslexia-reading-impairment-warrant-referral-in-a-young-child - What early indicators of dyslexia should a paediatrician watch for?: https://pinnacleblooms.org/ask/what-early-indicators-of-dyslexia-reading-impairment-should-a-paediatrician-watch-for - When should a doctor refer a child with suspected dyslexia for developmental therapy?: https://pinnacleblooms.org/ask/when-should-a-doctor-refer-a-child-with-suspected-dyslexia-reading-impairment-for-developmental-therapy - Can Dyslexia Be Cured?: https://pinnacleblooms.org/ask/can-dyslexia-reading-impairment-be-cured - Can Dyslexia Be Prevented?: https://pinnacleblooms.org/ask/can-dyslexia-reading-impairment-be-prevented - Do boys show dyslexia differently?: https://pinnacleblooms.org/ask/do-boys-show-dyslexia-reading-impairment-differently - Do girls show dyslexia differently?: https://pinnacleblooms.org/ask/do-girls-show-dyslexia-reading-impairment-differently - Spotting possible dyslexia early: https://pinnacleblooms.org/ask/how-can-a-frontline-health-worker-spot-a-child-with-possible-dyslexia-reading-impairment-early - Should I be worried my child might have dyslexia?: https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-dyslexia-reading-impairment - Early Signs of Dyslexia (Reading Impairment): https://pinnacleblooms.org/ask/what-are-the-early-signs-of-dyslexia-reading-impairment - Early signs of dyslexia in a 1-year-old boy: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-dyslexia-reading-impairment-in-a-1-year-old-boy - Early Signs of Dyslexia in a 1-Year-Old Girl: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-dyslexia-reading-impairment-in-a-1-year-old-girl ### Explore causes & influences - Contributing Factors for Dyslexia in Early Childhood: https://pinnacleblooms.org/ask/what-are-the-known-contributing-factors-for-dyslexia-reading-impairment-in-early-childhood - Are boys more likely to have dyslexia?: https://pinnacleblooms.org/ask/are-boys-more-likely-to-have-dyslexia-reading-impairment - Are girls more likely to have dyslexia?: https://pinnacleblooms.org/ask/are-girls-more-likely-to-have-dyslexia-reading-impairment - Early Dyslexia Intervention, UNCRPD and the SDGs: https://pinnacleblooms.org/ask/how-does-early-intervention-for-dyslexia-reading-impairment-advance-un-child-rights-uncrpd-and-the-sdgs - What Causes Dyslexia in Young Children?: https://pinnacleblooms.org/ask/what-causes-dyslexia-reading-impairment-in-young-children - Cost-effectiveness of early dyslexia therapy: https://pinnacleblooms.org/ask/what-is-the-cost-effectiveness-of-early-therapy-for-dyslexia-reading-impairment-in-young-children - Dyslexia in India: prevalence and public-health burden: https://pinnacleblooms.org/ask/what-is-the-prevalence-and-public-health-burden-of-dyslexia-reading-impairment-among-young-children-in-india ### Understand assessment - Standardised tools for assessing dyslexia in early childhood: https://pinnacleblooms.org/ask/which-standardised-tools-are-used-to-assess-dyslexia-reading-impairment-in-early-childhood - Dyslexia screening and diagnostic pathway under 7: https://pinnacleblooms.org/ask/what-is-the-recommended-screening-and-diagnostic-pathway-for-dyslexia-reading-impairment-in-children-under-7 - How AbilityScore tracks progress in a child with dyslexia: https://pinnacleblooms.org/ask/how-does-abilityscore-track-progress-in-a-child-with-dyslexia-reading-impairment - How Dyslexia Is Assessed in a Young Child: https://pinnacleblooms.org/ask/how-is-dyslexia-reading-impairment-assessed-in-a-young-child - How is Dyslexia Assessed in Children Under 7?: https://pinnacleblooms.org/ask/how-is-dyslexia-reading-impairment-assessed-in-children-under-7 - AbilityScore 0–100 for a child with dyslexia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-0-100-mean-for-a-child-with-dyslexia-reading-impairment - What an AbilityScore of 100–200 Means for a Child with Dyslexia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-100-200-mean-for-a-child-with-dyslexia-reading-impairment - What does an AbilityScore of 200–300 mean for a child with Dyslexia?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-200-300-mean-for-a-child-with-dyslexia-reading-impairment - What does an AbilityScore of 300–400 mean for a child with Dyslexia?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-300-400-mean-for-a-child-with-dyslexia-reading-impairment - What an AbilityScore of 400–500 Means for a Child with Dyslexia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-400-500-mean-for-a-child-with-dyslexia-reading-impairment - What does an AbilityScore of 500–600 mean for a child with Dyslexia?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-500-600-mean-for-a-child-with-dyslexia-reading-impairment - What does an AbilityScore of 600–700 mean in dyslexia?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-600-700-mean-for-a-child-with-dyslexia-reading-impairment ### Explore therapy & support - Supporting a Child with Dyslexia Day to Day: https://pinnacleblooms.org/ask/as-a-grandparent-or-caregiver-how-can-i-support-a-child-with-dyslexia-reading-impairment-day-to-day - Can a child with dyslexia attend a mainstream school?: https://pinnacleblooms.org/ask/can-a-child-with-dyslexia-reading-impairment-attend-a-mainstream-school - Can a Child with Dyslexia Attend a Regular School?: https://pinnacleblooms.org/ask/can-a-child-with-dyslexia-reading-impairment-attend-a-regular-school - Can a Child with Dyslexia Grow Up to Live Independently?: https://pinnacleblooms.org/ask/can-a-child-with-dyslexia-reading-impairment-grow-up-to-live-independently - How a Teacher Can Help a Child with Dyslexia Learn: https://pinnacleblooms.org/ask/how-can-a-classroom-teacher-help-a-child-with-dyslexia-reading-impairment-take-part-and-learn - Identifying and supporting under-7s at risk of dyslexia in a district programme: https://pinnacleblooms.org/ask/how-can-a-district-early-intervention-programme-identify-and-support-children-under-7-with-dyslexia-reading-impairment - How a teacher can support a child with dyslexia in class: https://pinnacleblooms.org/ask/how-can-a-teacher-include-and-support-a-young-child-with-dyslexia-reading-impairment-in-a-mainstream-classroom - Supporting Cognitive Development in a Child with Dyslexia: https://pinnacleblooms.org/ask/how-can-we-support-cognitive-development-in-a-child-with-dyslexia-reading-impairment - How therapy helps a child with dyslexia make progress: https://pinnacleblooms.org/ask/how-does-therapy-help-a-child-with-dyslexia-reading-impairment-make-progress - How Is Dyslexia Diagnosed in a Child?: https://pinnacleblooms.org/ask/how-is-dyslexia-reading-impairment-diagnosed-in-a-child - How Dyslexia Is Supported Through Therapy: https://pinnacleblooms.org/ask/how-is-dyslexia-reading-impairment-supported-through-therapy - Dyslexia AbilityScore 0–100 — Your Next Steps: https://pinnacleblooms.org/ask/my-child-with-dyslexia-reading-impairment-has-an-abilityscore-of-0-100-what-should-we-do-next ### At home & in everyday life - How to Support Your Child with Dyslexia at Home: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-dyslexia-reading-impairment-at-home