Q21.1
Q21.1 — Atrial septal defect
Non-billable headerICD-10-CM
Q21.1 is a non-billable header ICD-10-CM code for atrial septal defect. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- ostium primum atrial septal defect (type I) (Q21.20)
Risk adjustment
Q21.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead Q21.1
8 child codes. Green means billable.
- 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
Related codes at this level
Codes that share Q21. If Q21.1 is not quite right, the correct code is usually one of these.
Questions about Q21.1
- Is Q21.1 a billable ICD-10-CM code?
- No. Q21.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Q21.1 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).