{"h1":"SNOMED CT Concept for Rett Syndrome","faq":[{"a":"Rett syndrome is represented by the SNOMED CT concept 'Rett's disorder (disorder)', SCTID 68618008. Always verify against your active SNOMED CT release, as concepts are versioned.","q":"What is the SNOMED CT concept ID for Rett syndrome?"},{"a":"The SNOMED CT concept for Rett's disorder maps to ICD-11 code LD90.0 (Rett syndrome), and to the legacy ICD-10 code F84.2.","q":"How does the SNOMED CT concept map to ICD-11?"},{"a":"SNOMED CT provides the clinically computable concept for the patient record, decision support and data retrieval, while ICD-11 LD90.0 is the statistical and morbidity reporting code. Capturing both preserves both clinical reasoning and reporting comparability.","q":"Why use SNOMED CT and ICD-11 together?"}],"lang":"en","slug":"what-is-the-snomed-ct-concept-for-rett-syndrome","title":"What is the SNOMED CT concept for Rett Syndrome?","entity":{"key":"rett","kind":"condition","name":"Rett Syndrome","slug":null},"lenses":[{"kind":"stakeholder","label":"Doctor","value":"doctor"},{"kind":"domain","label":"Context","value":"context"},{"kind":"intent","label":"Definition","value":"definition"},{"kind":"lifecycle","label":"Screen","value":"screen"},{"kind":"route","label":"Screen","value":"screen"},{"kind":"empowerment","label":"Early Clarity","value":"early_clarity"}],"parent":{"key":"conditions","label":"Conditions"},"related":[{"lang":"en","slug":"what-is-rett-syndrome-and-what-are-its-icd-11-features-in-early-childhood","title":"What is Rett Syndrome, and its ICD-11 features in early childhood?"},{"lang":"en","slug":"what-is-the-icd-11-classification-for-rett-syndrome","title":"ICD-11 Classification of Rett Syndrome (LD90.0)"},{"lang":"en","slug":"what-are-the-known-contributing-factors-for-rett-syndrome-in-early-childhood","title":"Known contributing factors for Rett Syndrome"},{"lang":"en","slug":"which-icf-functioning-domains-does-rett-syndrome-affect-in-early-childhood","title":"Rett Syndrome and ICF Functioning Domains in Early Childhood"},{"lang":"en","slug":"which-standardised-tools-are-used-to-assess-rett-syndrome-in-early-childhood","title":"Standardised tools for assessing Rett syndrome in early childhood"},{"lang":"en","slug":"what-is-the-recommended-screening-and-diagnostic-pathway-for-rett-syndrome-in-children-under-7","title":"Rett Syndrome Diagnostic Pathway in Children Under 7"}],"summary":"In SNOMED CT, Rett syndrome is the concept Rett's disorder (SCTID 68618008), mapping to ICD-11 LD90.0 and legacy ICD-10 F84.2. SNOMED CT carries the computable clinical concept; ICD-11 LD90.0 is the statistical code. Always verify the SCTID against your current SNOMED release.","answer_md":"*Clean terminology mapping is what lets a Rett syndrome diagnosis travel safely across your EHR, your referrals and your research datasets.*\n\n## In short\nIn **SNOMED CT**, Rett syndrome is represented by the fully specified concept **Rett's disorder (disorder)**, SCTID **68618008**, a child of the X-linked dominant developmental encephalopathy hierarchy. It maps to **ICD-11 LD90.0** (Rett syndrome, under Developmental anomalies / Syndromes with central nervous system involvement) and to the legacy **ICD-10 F84.2**. SNOMED CT gives you the clinically computable concept for the problem list and decision support; ICD-11 LD90.0 is your statistical and reporting code. Always confirm the current SCTID against your active SNOMED CT release, as concept status and synonyms are versioned.\n\n## Why the dual coding matters\nRett syndrome is a clinically diagnosed neurodevelopmental disorder, classically associated with pathogenic *MECP2* variants, characterised by a period of apparently typical early development followed by regression — loss of purposeful hand use with stereotypic hand movements, gait abnormalities, and impaired language and social engagement. For interoperable records, the discipline is two-layered: capture the **SNOMED CT** concept (68618008) for the patient record and clinical reasoning, and the **ICD-11** linearisation code (**LD90.0**) for morbidity coding and notification. SNOMED CT's hierarchy lets you retrieve the condition alongside related encephalopathies and link it to genetic findings; the ICD-11 code preserves comparability in national health statistics under the Indian context. Where downstream therapy planning is needed, the functional picture — communication, motor, sensory and self-care — is described in the **WHO ICF** framework, which complements rather than replaces the diagnostic code.\n\n## The Pinnacle way\nCoding identifies a condition; it does not establish one for a given child. A clinical **AbilityScore®** and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from a code or an online form. For families navigating a confirmed or suspected Rett presentation, we translate the diagnosis into a functional, domain-by-domain plan. Explore [how Pinnacle supports development](/), our [occupational therapy](/occupational-therapy) and [speech therapy](/speech-therapy) pathways, and [what the AbilityScore is and how it is established](/ask/what-is-the-abilityscore-and-how-is-it-calculated).\n\n## Trusted sources\nWHO ICD-11 entry for Rett syndrome (LD90.0); SNOMED International concept browser for Rett's disorder; WHO International Classification of Functioning, Disability and Health (ICF) for the functional layer.\n\n**Next step —** Confirm the SCTID in your active SNOMED CT release, then [partner with a Pinnacle centre](/) to convert the diagnosis into a functional therapy plan.\n\nThis is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.","canonical":"https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-rett-syndrome","editorial":{"reviewed_at":"2026-06-11T20:12:18.613642+00:00","reviewed_by":null,"developed_by":"SETU Consortium · Pinnacle Blooms Network"},"alternates":[{"href":"https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-rett-syndrome","lang":"en","indexable":true},{"href":"https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-rett-syndrome-te","lang":"te","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"SNOMED CT Concept for Rett Syndrome","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"On the problem list, record the SNOMED CT concept for clinical reasoning and the ICD-11 LD90.0 code for morbidity reporting — the two layers serve different purposes and should both be captured.","published_at":"2026-06-10T11:41:40.493798+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"what-is-the-icd-11-classification-for-rett-syndrome","title":"ICD-11 Classification of Rett Syndrome (LD90.0)","reason":"Linked from this 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support","total":68},{"key":"home","items":[{"lang":"en","slug":"how-can-i-support-my-child-with-rett-syndrome-at-home","title":"How can I support my child with Rett Syndrome at home?","reason":"Same topic"}],"label":"At home & in everyday life","total":1}],"what_to_watch":"Confirm the SCTID against your active SNOMED CT release, since concept status, synonyms and mappings are versioned and may update between editions.","authority_links":[{"url":"https://icd.who.int/","code":"LD90.0","label":"WHO ICD-11: Rett syndrome"},{"url":"https://www.who.int/standards/classifications/international-classification-of-functioning-disability-and-health","label":"WHO ICF framework for functioning"}],"last_reviewed_at":"2026-06-10T11:41:40.493798+00:00","meta_description":"Rett syndrome in SNOMED CT is Rett's disorder, SCTID 68618008, mapping to ICD-11 LD90.0. A clinician's guide to coding and interoperability.","related_materials":[],"related_techniques":[]}