Q21.21
Billable codePartial atrioventricular septal defect
The ICD-10 code for partial atrioventricular septal defect is Q21.21.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Incomplete atrioventricular canal
- Incomplete atrioventricular septal defect
- Incomplete endocardial cushion defect
- Ostium primum atrial septal defect (type I) with separate atrioventricular valves
- Partial atrioventricular canal
- Partial endocardial cushion defect
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Q21.20Atrioventricular septal defect, unspecified as to partial or complete
- Q21.22Transitional atrioventricular septal defect
- Q21.23Complete atrioventricular septal defect
- Q21.21Partial atrioventricular septal defect
Associated MS-DRGs
Q21.21 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.