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Q04.3 Other reduction deformities of brain
BackQ04Other congenital malformations of brainCategory9 →Q04.0Congenital malformations of corpus callosumCategoryQ04.1ArhinencephalyCategoryQ04.2HoloprosencephalyCategoryQ04.3Other reduction deformities of brainCategoryQ04.4Septo-optic dysplasia of brainCategoryQ04.5MegalencephalyCategoryQ04.6Congenital cerebral cystsCategoryQ04.8Other specified congenital malformations of brainCategoryQ04.9Congenital malformation of brain, unspecifiedCategory
CategoryCODABLE
Q04.3
Other reduction deformities of brain
EXAMPLES
Absence of part of brain
Agenesis of part of brain
Agyria
Aplasia of part of brain
Hydranencephaly
Hypoplasia of part of brain
Lissencephaly
Microgyria
Pachygyria
Agenesis of part of brain
Agyria
Aplasia of part of brain
Hydranencephaly
Hypoplasia of part of brain
Lissencephaly
Microgyria
Pachygyria
EXCLUDES
Excludes1: congenital malformations of corpus callosum (Q04.0)
- Chapter
- XVII · Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q00-Q07
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.