Is Q21.2 a billable ICD-10-CM code?

No. Q21.2 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q21.2 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).

Q21.2

Q21.2 — Atrioventricular septal defect

Non-billable headerICD-10-CM

Q21.2 is a non-billable header ICD-10-CM code for atrioventricular septal defect. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Atrioventricular canal defect
Endocardial cushion defect
Ostium primum atrial septal defect (type I)

Risk adjustment

Q21.2 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 Q21.2

4 child codes. Green means billable.

Related codes at this level

Codes that share Q21. If Q21.2 is not quite right, the correct code is usually one of these.

Questions about Q21.2

Is Q21.2 a billable ICD-10-CM code?: No. Q21.2 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q21.2 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).