ICD-10 diagnosis code
Q21.9 Congenital malformation of cardiac septum, unspecified
Q21.9 is the ICD-10 code for Congenital malformation of cardiac septum, unspecified. It is a four-character subcategory of Q21 (Congenital malformations of cardiac septa), the most specific level in the WHO edition. It belongs to the block Q20–Q28 (Congenital malformations of the circulatory system) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.
- Code type
- Subcategory (4 characters)
- Chapter
- XVII · Q00–Q99
- Classification
- WHO ICD-10, 2019 version
What Q21.9 includes
Conditions and terms that are coded here.
- Septal (heart) defect NOS
Q21.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
Q21.9Uspesifisert medfødt misdannelse i hjerteskillevegg
DQ219Medfødt misdannelse af hjerteskillevæg UNS
Q21.9Määrittämätön synnynnäinen sydänväliseinien epämuodostuma
Q21.9Angeborene Fehlbildung des Herzseptums, nicht näher bezeichnet
Q21.9Malformation congénitale d'une cloison cardiaque, sans précision
Q21.9congenitale misvorming van hartseptum, niet-gespecificeerd
Q21.9Congenital malformation of cardiac septum, unspecified
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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