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- Q00-Q07 Congenital malformations of the nervous system
- Q10-Q18 Congenital malformations of eye, ear, face and neck
- Q20-Q28 Congenital malformations of the circulatory system
- Q30-Q34 Congenital malformations of the respiratory system
- Q35-Q37 Cleft lip and cleft palate
- Q38-Q45 Other congenital malformations of the digestive system
- Q50-Q56 Congenital malformations of genital organs
- Q60-Q64 Congenital malformations of the urinary system
- Q65-Q79 Congenital malformations and deformations of the musculoskeletal system
- Q80-Q89 Other congenital malformations
- Q90-Q99 Chromosomal abnormalities, not elsewhere classified
Congenital malformations of the nervous system (Q00-Q07)
Q00 Anencephaly and similar malformations
- Q00.0 Anencephaly
- Acephaly
- Acrania
- Amyelencephaly
- Hemianencephaly
- Hemicephaly
- Q00.1 Craniorachischisis
- Q00.2 Iniencephaly
Q01 Encephalocele
- Includes: Arnold-Chiari syndrome, type III
- encephalocystocele
- encephalomyelocele
- hydroencephalocele
- hydromeningocele, cranial
- meningocele, cerebral
- meningoencephalocele
- Excludes1: Meckel-Gruber syndrome (Q61.9)
- Q01.0 Frontal encephalocele
- Q01.1 Nasofrontal encephalocele
- Q01.2 Occipital encephalocele
- Q01.8 Encephalocele of other sites
- Q01.9 Encephalocele, unspecified
Q02 Microcephaly
- Includes: hydromicrocephaly
- micrencephalon
- Excludes1: Meckel-Gruber syndrome (Q61.9)
Q03 Congenital hydrocephalus
- Includes: