Q00.0 Anencephaly

 Q00.1 Craniorachisc-hisis

Q01.0

Frontal encephalocele

Q01.1 Nasofrontal encephalocele

Q01.2

Occipital encephalocele

 Q01.8 Encephalocele of other sites

Q03.0 Malformations of aqueduct of Sylvius

Q03.1

Atresia of foramina of Magendie & Luschka

Q03.8

Other congenital hydrocephalus

Q03.9 Congenital hydrocephalus, unspecified

 Q04.0

Congenital malformations of corpus callosum

Q04.1 Arhinencephaly

Q04.2 Holoprosen-cephaly

 Q04.3

Other reduction deformities of brain

 Q04.4

Septo-optic dysplasia of brain

 Q04.5 Megalenceph-aly

Q04.6 Congenital cerebral cysts

Q04.8

Other specified congenital malformations of brain

Q05.0

Cervical spina bifida with hydrocephalus

 Q05.1

Thoracic spina bifida with hydrocephalus

Q05.2

Lumbar spina bifida with hydrocephalus

 Q05.3

Sacral spina bifida with hydrocephalus

Q05.4 Unspecified spina bifida with hydrocephalus

Q05.5

Cervical spina bifida without hydrocephalus

Q05.6

Thoracic spina bifida without hydrocephalus

Q05.7

Lumbar spina bifida without hydrocephalus

Q05.8

Sacral spina bifida without hydrocephalus

Q05.9

Spina bifida, unspecified

Q06.0

Amyelia

 Q06.1 Hypoplasia & dysplasia of spinal cord

Q06.2 Diastema-tomyelia

 Q06.3

Other congenital cauda equina malformations

Q06.4 Hydromyelia

Q06.8

Other specified congenital malformations of spinal cord

Q07.0

Arnold-Chiari syndrome

 Q07.8

Other specified congenital malformations of nervous system