1. Q28 Other congenital malformations of circulatory system

    Excludes1

    • congenital aneurysm NOS (Q27.8)
    • congenital coronary aneurysm (Q24.5)
    • ruptured cerebral arteriovenous malformation (I60.8)
    • ruptured malformation of precerebral vessels (I72.0)

    Excludes2

    • congenital peripheral aneurysm (Q27.8)
    • congenital pulmonary aneurysm (Q25.79)
    • congenital retinal aneurysm (Q14.1)
    1. Q28.0 Arteriovenous malformation of precerebral vessels

      Inclusion term(s):

      • Congenital arteriovenous precerebral aneurysm (nonruptured)
    2. Q28.1 Other malformations of precerebral vessels

      Inclusion term(s):

      • Congenital malformation of precerebral vessels NOS
      • Congenital precerebral aneurysm (nonruptured)
    3. Q28.2 Arteriovenous malformation of cerebral vessels

      Inclusion term(s):

      • Arteriovenous malformation of brain NOS
      • Congenital arteriovenous cerebral aneurysm (nonruptured)
    4. Q28.3 Other malformations of cerebral vessels

      Inclusion term(s):

      • Congenital cerebral aneurysm (nonruptured)
      • Congenital malformation of cerebral vessels NOS
      • Developmental venous anomaly
    5. Q28.8 Other specified congenital malformations of circulatory system

      Inclusion term(s):

      • Congenital aneurysm, specified site NEC
      • Spinal vessel anomaly
    6. Q28.9 Congenital malformation of circulatory system, unspecified

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.