ICD-10-CM · Chapter 17 · Q00–Q99
Q21.1
Atrial septal defect
Congenital malformations, deformations and chromosomal abnormalities
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- Q21.1
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q21 — Congenital malformations of cardiac septa
- Specificity
- 4 characters
How coders use this code
ICD-10-CM Q21.1 is a category (header) for atrial septal defect. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in Q21
- Q21Congenital malformations of cardiac septa
- Q21.0Ventricular septal defect
- Q21.10Atrial septal defect, unspecified
- Q21.11Secundum atrial septal defect
- Q21.12Patent foramen ovale
- Q21.13Coronary sinus atrial septal defect
- Q21.14Superior sinus venosus atrial septal defect
- Q21.15Inferior sinus venosus atrial septal defect
- Q21.16Sinus venosus atrial septal defect, unspecified
- Q21.19Other specified atrial septal defect
- Q21.2Atrioventricular septal defect
- Q21.20Atrioventricular septal defect, unspecified as to partial or complete
- Q21.21Partial atrioventricular septal defect
- Q21.22Transitional atrioventricular septal defect
- Q21.23Complete atrioventricular septal defect
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