Q04.3 is the ICD-10 code for Other reduction deformities of brain. It is a four-character subcategory of Q04 (Other congenital malformations of brain), the most specific level in the WHO edition. It belongs to the block Q00–Q07 (Congenital malformations of the nervous system) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.
- Code type
- Subcategory (4 characters)
- Chapter
- XVII · Q00–Q99
- Classification
- WHO ICD-10, 2019 version
What Q04.3 includes
Conditions and terms that are coded here.
- Absence
- of part of brain
- Agenesis
- of part of brain
- Aplasia
- of part of brain
- Hypoplasia
- of part of brain
- Agyria
- Hydranencephaly
- Lissencephaly
- Microgyria
- Pachygyria
What Q04.3 excludes
Conditions that look similar but belong under another code.
- congenital malformations of corpus callosum Q04.0
Q04.3 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
Q04.3Annen reduksjonsdeformitet i hjernen
DQ043Anden cerebral hypoplasi
- DQ043AAgyria
- DQ043BHydranencefali
- DQ043CHypoplasia congenita cerebri partialis
- DQ043FLissencefali
- DQ043GMikrogyri
- DQ043HPakygyri
Q04.3Muu aivojen vajaakehitystila
Q04.3Sonstige Reduktionsdeformitäten des Gehirns
Q04.3Autres anomalies localisées du développement de l'encéphale
Q04.3overige onderontwikkeling van hersenen
Q04.3Other reduction deformities of brain
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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