All ICD10 Codes
Chapter 17

Q00–Q99: Congenital Malformations, Deformations and Chromosomal Abnormalities

Congenital Malformations, Deformations and Chromosomal Abnormalities diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)
All CodesBillable Only
Internal Codes
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  • Q27.4|

    Congenital phlebectasia

  • Q27.8|

    Other specified congenital malformations of peripheral vascular system

  • Q27.9|

    Congenital malformation of peripheral vascular system, unspecified

  • Q28.0|

    Arteriovenous malformation of precerebral vessels

  • Q28.1|

    Other malformations of precerebral vessels

  • Q28.2|

    Arteriovenous malformation of cerebral vessels

  • Q28.3|

    Other malformations of cerebral vessels

  • Q28.8|

    Other specified congenital malformations of circulatory system

  • Q28.9|

    Congenital malformation of circulatory system, unspecified

  • Q30.0|

    Choanal atresia

  • Q30.1|

    Agenesis and underdevelopment of nose

  • Q30.2|

    Fissured, notched and cleft nose

  • Q30.3|

    Congenital perforated nasal septum

  • Q30.8|

    Other congenital malformations of nose

  • Q30.9|

    Congenital malformation of nose, unspecified

  • Q31.0|

    Web of larynx

  • Q31.1|

    Congenital subglottic stenosis

  • Q31.2|

    Laryngeal hypoplasia

  • Q31.3|

    Laryngocele

  • Q31.5|

    Congenital laryngomalacia

  • Q31.8|

    Other congenital malformations of larynx

  • Q31.9|

    Congenital malformation of larynx, unspecified

  • Q32.0|

    Congenital tracheomalacia

  • Q32.1|

    Other congenital malformations of trachea

  • Q32.2|

    Congenital bronchomalacia

  • Q32.3|

    Congenital stenosis of bronchus

  • Q32.4|

    Other congenital malformations of bronchus

  • Q33.0|

    Congenital cystic lung

  • Q33.1|

    Accessory lobe of lung

  • Q33.2|

    Sequestration of lung

  • Q33.3|

    Agenesis of lung

  • Q33.4|

    Congenital bronchiectasis

  • Q33.5|

    Ectopic tissue in lung

  • Q33.6|

    Congenital hypoplasia and dysplasia of lung

  • Q33.8|

    Other congenital malformations of lung

  • Q33.9|

    Congenital malformation of lung, unspecified

  • Q34.0|

    Anomaly of pleura

  • Q34.1|

    Congenital cyst of mediastinum

  • Q34.8|

    Other specified congenital malformations of respiratory system

  • Q34.9|

    Congenital malformation of respiratory system, unspecified

  • Q35.1|

    Cleft hard palate

  • Q35.3|

    Cleft soft palate

  • Q35.5|

    Cleft hard palate with cleft soft palate

  • Q35.7|

    Cleft uvula

  • Q35.9|

    Cleft palate, unspecified

  • Q36.0|

    Cleft lip, bilateral

  • Q36.1|

    Cleft lip, median

  • Q36.9|

    Cleft lip, unilateral

  • Q37.0|

    Cleft hard palate with bilateral cleft lip

  • Q37.1|

    Cleft hard palate with unilateral cleft lip

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