ICD-11 Classification for Dyslexia (Reading Impairment): 6A03.0

A precise diagnostic code anchors every report, every referral and every funding decision — so getting the ICD-11 classification right matters.

In short

In ICD-11-MMS, Dyslexia is classified under code 6A03.0 — Developmental learning disorder with impairment in reading. It sits within the parent category 6A03 Developmental learning disorder, itself nested in the neurodevelopmental disorders grouping. The code captures significant, persistent difficulty acquiring reading accuracy, fluency and comprehension that is markedly below expectation for age and intellectual ability, and not better accounted for by intellectual disability, sensory impairment, neurological disorder, inadequate schooling or lack of language proficiency.

The classification, precisely

ICD-11 replaced the older ICD-10 "specific reading disorder" (F81.0) with a functionally framed model. Key points for clinical coding:

• 6A03 Developmental learning disorder is the parent term; reading-specific presentation is qualified as 6A03.0 — with impairment in reading.
• The descriptor encompasses difficulties with word reading accuracy, reading fluency and reading comprehension — the cluster commonly termed dyslexia.
• Onset is during the developmental period and difficulties are persistent, not transient.
• Co-occurring impairments — e.g. 6A03.1 written expression, 6A03.2 mathematics — are coded additionally where present, as comorbidity is common.
• Diagnosis requires that difficulties are quantifiably below the level expected for chronological age and are not attributable to a disorder of intellectual development, uncorrected visual or hearing impairment, other neurological or motor disorder, lack of access to education, or limited language proficiency in the language of assessment.

When to assess

Reading impairment is reliably formalised once formal literacy instruction is established — typically from age 6–8 onwards — as persistent difficulty despite adequate instruction and opportunity is central to the construct. Refer for structured assessment when a child shows ongoing difficulty with decoding, reading speed or comprehension that is disproportionate to overall cognitive ability and other learning.

The Pinnacle way

A clinical AbilityScore® and any diagnosis are established only at a Pinnacle Blooms Network centre, under qualified clinician care — never from a code lookup or an online tool. Our clinician-administered structured assessment profiles reading alongside language, cognition and attention, so the formulation reflects the whole child. Explore how the AbilityScore® is determined, our structured learning and literacy support, and the Pinnacle approach.

Trusted sources

WHO ICD-11 for Mortality and Morbidity Statistics, neurodevelopmental disorders chapter (developmental learning disorder); WHO classification framework guidance. Codes should be confirmed against the current ICD-11 browser before clinical use.

Next step — Partner with Pinnacle for clinician-led literacy assessment and intervention — begin a referral.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.