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ICDMine.com › Browse ICD-10-CM Codes › Ch. 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1) › Congenital malformations of the circulatory system (Q20-Q28) › Q21 Congenital malformations of cardiac septa › Q21.1

Q21.1Atrial septal defect

ICD-10-CM category (non-billable header) code — part of Congenital malformations of the circulatory system (Q20-Q28)

Code Details

Billable	No — use a more specific child code
Chapter	Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
Section	Congenital malformations of the circulatory system (Q20-Q28)
Parent code	Q21 — Congenital malformations of cardiac septa

Coding Notes

Excludes2 (not part of this condition — may code both)

ostium primum atrial septal defect (type I) (Q21.20)

Subcategories (8)

Q21.10 Atrial septal defect, unspecified
Q21.11 Secundum atrial septal defect
Q21.12 Patent foramen ovale
Q21.13 Coronary sinus atrial septal defect
Q21.14 Superior sinus venosus atrial septal defect
Q21.15 Inferior sinus venosus atrial septal defect
Q21.16 Sinus venosus atrial septal defect, unspecified
Q21.19 Other specified atrial septal defect

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