1. Q23 Congenital malformations of aortic and mitral valves

    1. Q23.0 Congenital stenosis of aortic valve

      Inclusion term(s):

      • Congenital aortic atresia
      • Congenital aortic stenosis NOS
    2. Q23.1 Congenital insufficiency of aortic valve

      Inclusion term(s):

      • Bicuspid aortic valve
      • Congenital aortic insufficiency
    3. Q23.2 Congenital mitral stenosis

      Inclusion term(s):

      • Congenital mitral atresia
    4. Q23.3 Congenital mitral insufficiency

    5. Q23.4 Hypoplastic left heart syndrome

    6. Q23.8 Other congenital malformations of aortic and mitral valves

    7. Q23.9 Congenital malformation of aortic and mitral valves, 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.