Q00–Q99
Congenital Malformations, Deformations and Chromosomal Abnormalities
Down syndrome, congenital heart defects
Q00
Anencephaly and similar malformations
Non-billable
Q00.0
Anencephaly
Billable
Q00.1
Craniorachischisis
Billable
Q00.2
Iniencephaly
Billable
Q01
Encephalocele
Non-billable
Q01.0
Frontal encephalocele
Billable
Q01.1
Nasofrontal encephalocele
Billable
Q01.2
Occipital encephalocele
Billable
Q01.8
Encephalocele of other sites
Billable
Q01.9
Encephalocele, unspecified
Billable
Q02
Microcephaly
Billable
Q03
Congenital hydrocephalus
Non-billable
Q03.0
Malformations of aqueduct of Sylvius
Billable
Q03.1
Atresia of foramina of Magendie and Luschka
Billable
Q03.8
Other congenital hydrocephalus
Billable
Q03.9
Congenital hydrocephalus, unspecified
Billable
Q04
Other congenital malformations of brain
Non-billable
Q04.0
Congenital malformations of corpus callosum
Billable
Q04.1
Arhinencephaly
Billable
Q04.2
Holoprosencephaly
Billable
Q04.3
Other reduction deformities of brain
Billable
Q04.4
Septo-optic dysplasia of brain
Billable
Q04.5
Megalencephaly
Billable
Q04.6
Congenital cerebral cysts
Billable
Q04.8
Other specified congenital malformations of brain
Billable
Q04.9
Congenital malformation of brain, unspecified
Billable
Q05
Spina bifida
Non-billable
Q05.0
Cervical spina bifida with hydrocephalus
Billable
Q05.1
Thoracic spina bifida with hydrocephalus
Billable
Q05.2
Lumbar spina bifida with hydrocephalus
Billable
Q05.3
Sacral spina bifida with hydrocephalus
Billable
Q05.4
Unspecified spina bifida with hydrocephalus
Billable
Q05.5
Cervical spina bifida without hydrocephalus
Billable
Q05.6
Thoracic spina bifida without hydrocephalus
Billable
Q05.7
Lumbar spina bifida without hydrocephalus
Billable
Q05.8
Sacral spina bifida without hydrocephalus
Billable
Q05.9
Spina bifida, unspecified
Billable
Q06
Other congenital malformations of spinal cord
Non-billable
Q06.0
Amyelia
Billable
Q06.1
Hypoplasia and dysplasia of spinal cord
Billable
Q06.2
Diastematomyelia
Billable
Q06.3
Other congenital cauda equina malformations
Billable
Q06.4
Hydromyelia
Billable
Q06.8
Other specified congenital malformations of spinal cord
Billable
Q06.9
Congenital malformation of spinal cord, unspecified
Billable
Q07
Other congenital malformations of nervous system
Non-billable
Q07.0
Arnold-Chiari syndrome
Non-billable
Q07.00
Arnold-Chiari syndrome without spina bifida or hydrocephalus
Billable
Q07.01
Arnold-Chiari syndrome with spina bifida
Billable
Q07.02
Arnold-Chiari syndrome with hydrocephalus
Billable
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