1. Q04 Other congenital malformations of brain


    1. Q04.0 Congenital malformations of corpus callosum

      Inclusion term(s):

      • Agenesis of corpus callosum
    2. Q04.1 Arhinencephaly

    3. Q04.2 Holoprosencephaly

    4. Q04.3 Other reduction deformities of brain

      Inclusion term(s):

      • 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
    5. Q04.4 Septo-optic dysplasia of brain

    6. Q04.5 Megalencephaly

    7. Q04.6 Congenital cerebral cysts

      Inclusion term(s):

      • Porencephaly
      • Schizencephaly
    8. Q04.8 Other specified congenital malformations of brain

      Inclusion term(s):

      • Arnold-Chiari syndrome, type IV
      • Macrogyria
    9. Q04.9 Congenital malformation of brain, unspecified

      Inclusion term(s):

      • Congenital anomaly NOS of brain
      • Congenital deformity NOS of brain
      • Congenital disease or lesion NOS of brain
      • Multiple anomalies NOS of brain, congenital
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.