Q21.11
BillableSecundum atrial septal defect
Q21.11 is the ICD-10-CM code for Secundum atrial septal defect. It is a billable, specific code valid for reimbursement.
Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
Includes
- •Fenestrated atrial septum
- •Patent or persistent ostium secundum defect (type II)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition