ICD-10 diagnosis code
Q20 Congenital malformations of cardiac chambers and connections
Q20 is the ICD-10 code for Congenital malformations of cardiac chambers and connections. It is a three-character category divided into 9 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block Q20–Q28 (Congenital malformations of the circulatory system) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.
- Code type
- Category (3 characters)
- Chapter
- XVII · Q00–Q99
- Classification
- WHO ICD-10, 2019 version
What Q20 excludes
Conditions that look similar but belong under another code.
Subcodes of Q20
- Q20.0Common arterial trunk
- Q20.1Double outlet right ventricle
- Q20.2Double outlet left ventricle
- Q20.3Discordant ventriculoarterial connection
- Q20.4Double inlet ventricle
- Q20.5Discordant atrioventricular connection
- Q20.6Isomerism of atrial appendages
- Q20.8Other congenital malformations of cardiac chambers and connections
- Q20.9Congenital malformation of cardiac chambers and connections, unspecified
Q20 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
Q20Medfödda missbildningar av hjärtats kamrar och förbindelser
DQ20Medfødte misdannelser af hjertekamre
Q20Synnynnäiset sydämen lokeroiden ja yhteyksien epämuodostumat
Q20Angeborene Fehlbildungen der Herzhöhlen und verbindender Strukturen
Q20Malformations congénitales des cavités et des orifices cardiaques
Q20congenitale misvormingen van hartcompartimenten en verbindingen
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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