Q04 is the ICD-10 code for Other congenital malformations of brain. It is a three-character category divided into 9 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block Q00–Q07 (Congenital malformations of the nervous system) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.
- Code type
- Category (3 characters)
- Chapter
- XVII · Q00–Q99
- Classification
- WHO ICD-10, 2019 version
What Q04 excludes
Conditions that look similar but belong under another code.
Subcodes of Q04
- Q04.0Congenital malformations of corpus callosum
- Q04.1Arhinencephaly
- Q04.2Holoprosencephaly
- Q04.3Other reduction deformities of brain
- Q04.4Septo-optic dysplasia
- Q04.5Megalencephaly
- Q04.6Congenital cerebral cysts
- Q04.8Other specified congenital malformations of brain
- Q04.9Congenital malformation of brain, unspecified
Q04 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DQ04Andre medfødte misdannelser af hjernen
Q04Muut synnynnäiset aivojen epämuodostumat
Q04Sonstige angeborene Fehlbildungen des Gehirns
Q04Autres malformations congénitales de l'encéphale
Q04overige congenitale misvormingen van hersenen
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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