Q21.19
Other specified atrial septal defect
Billable code
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
This code · Q21.19
Synonyms
Common atrium Other specified atrial septal abnormality
Inherited from Q21.1Atrial septal defect
Excludes 2
ostium primum atrial septal defect (type I) (Q21.20)
Inherited from Q21Congenital malformations of cardiac septa
Excludes 1
acquired cardiac septal defect (I51.0)
Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities
Excludes 2
inborn errors of metabolism (E70-E88)
Official Guidelines for Q21.19
FY 2026 ›Sections that reference Q21.19
Sections whose FY 2026 text names Q21.19, its Q21 category, or a range containing it — the chapter guidance above is the authoritative source.
Find Q21.19 in the alphabetic index
25 index paths lead to this code
- Acleistocardia
- Lutembacher's disease or syndrome
- Abnormal, abnormality, abnormalities › atrial septal, specified NEC
- Absence › atrial septum
- Closure › interauricular septum, defective
- Common › atrium
- Defect, defective › interatrial septal
- Defect, defective › interauricular septal
- Disease, diseased › Lutembacher's
- Fusion, fused › atria
- Fusion, fused › auricles, heart
- Patent › interauricular septum
- Perforation, perforated › atrial septum, multiple
- Syndrome › Lutembacher's
- Absence › septum › atrial
- Agenesis › septum › atrial
- Cor › triloculare › biventriculare
- Defect, defective › atrial septal › specified NEC
- Imperfect › closure › interatrial ostium or septum
- Imperfect › closure › interauricular ostium or septum
- Anomaly, anomalous › heart › septum › auricular
- Anomaly, anomalous › heart › septum › interatrial
- Imperfect › closure › ostium › interatrial
- Imperfect › closure › ostium › interauricular
- Imperfect › closure › septum › atrial