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ICD-10 diagnosis code

Q21.8 Other congenital malformations of cardiac septa

This page in Swedish

Q21.8 is the ICD-10 code for Other congenital malformations of cardiac septa. 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 Q21.8 includes

Conditions and terms that are coded here.

  • Eisenmenger defect
  • Pentalogy of Fallot

What Q21.8 excludes

Conditions that look similar but belong under another code.

Q21.8 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

Q21.8Andra specificerade medfödda missbildningar av hjärtskiljeväggar

NorwayICD-10-NO

Q21.8Annen spesifisert medfødt misdannelse i hjerteskillevegg

DenmarkICD-10-DK

DQ218Anden medfødt misdannelse af hjerteskillevæg

  • DQ218AEisenmengers defekt
  • DQ218BOstium atrioventriculare commune
  • DQ218CPentalogia Fallot
FinlandICD-10-FI

Q21.8Muu synnynnäinen sydänväliseinien epämuodostuma

  • Q21.80Vasemman kammion ja oikean eteisen välinen yhteys
  • Q21.81Eisenmengerin oireyhtymä
  • Q21.88Muu synnynnäinen sydänväliseinien epämuodostuma
GermanyICD-10-GM

Q21.8Sonstige angeborene Fehlbildungen der Herzsepten

  • Q21.80Fallot-Pentalogie
  • Q21.88Sonstige angeborene Fehlbildungen der Herzsepten
FranceICD-10-FR

Q21.8Autres malformations congénitales des cloisons cardiaques

NetherlandsICD-10-NL

Q21.8overige gespecificeerde congenitale misvormingen van hartsepta

United StatesICD-10-CM

Q21.8Other congenital malformations of cardiac septa

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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