Q21.13

Billable

Coronary sinus atrial septal defect

Q21.13 is the ICD-10-CM code for Coronary sinus atrial septal defect. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
Q00-Q99
Parent
Q21.1
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

Includes

  • Coronary sinus defect
  • Unroofed coronary sinus

Frequently asked questions

What is ICD-10 code Q21.13?
Q21.13 is the ICD-10-CM code for "Coronary sinus atrial septal defect". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q21.13 a billable code?
Yes — Q21.13 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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