Q21.2

ICD-10Non-billable category

Atrioventricular septal defect

Official ICD-10-CM descriptor (FY2026)

Atrioventricular septal defect

Q21.2 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Inclusion terms

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

ICD-10-CM FY2026 defines 4 codes beneath Q21.2. See the ICD-10-CM index for what this site publishes.

Related codes in Q21

Where this code sits

Parent code
Q21

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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