Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)

Note:
Codes from this chapter are not for use on maternal records
Excludes 2:
inborn errors of metabolism (E70-E88)

Congenital malformations of the nervous system (Q00-Q07)

Q00 Anencephaly and similar malformations [+]
Q01 Encephalocele [+]
Includes: Arnold-Chiari syndrome, type III
encephalocystocele
encephalomyelocele
hydroencephalocele
hydromeningocele, cranial
meningocele, cerebral
meningoencephalocele
Excludes 1: Meckel-Gruber syndrome (Q61.9)
Q02 Microcephaly
Code first , if applicable, congenital Zika virus disease
Includes: hydromicrocephaly
micrencephalon
Excludes 1: Meckel-Gruber syndrome (Q61.9)
Q03 Congenital hydrocephalus [+]
Includes: hydrocephalus in newborn
Excludes 1: Arnold-Chiari syndrome, type II (Q07.0-)
acquired hydrocephalus (G91.-)
hydrocephalus due to congenital toxoplasmosis (P37.1)
hydrocephalus with spina bifida (Q05.0-Q05.4)
Q04 Other congenital malformations of brain [+]
Excludes 1: cyclopia (Q87.0)
macrocephaly (Q75.3)
Q05 Spina bifida [+]
Includes: hydromeningocele (spinal)
meningocele (spinal)
meningomyelocele
myelocele
myelomeningocele
rachischisis
spina bifida (aperta)(cystica)
syringomyelocele
Use additional code for any associated paraplegia (paraparesis) (G82.2-)
Excludes 1: Arnold-Chiari syndrome, type II (Q07.0-)
spina bifida occulta (Q76.0)
Q06 Other congenital malformations of spinal cord [+]
Q07 Other congenital malformations of nervous system [+]
Excludes 2: congenital central alveolar hypoventilation syndrome (G47.35)
familial dysautonomia [Riley-Day] (G90.1)
neurofibromatosis (nonmalignant) (Q85.0-)

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