Q21.10
BillableAtrial septal defect, unspecified
Q21.10 is the ICD-10-CM code for Atrial septal defect, unspecified. It is a billable, specific code valid for reimbursement.
Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
No additional coding notes for this code.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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