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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