2024 – New Code20242025Billable/Specific Code
- Q21.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM Q21.21 became effective on October 1, 2022.
- This is the American ICD-10-CM version of Q21.21 – other international versions of ICD-10 Q21.21 may differ.
ICD-10-CM Q21.21 is grouped within Diagnostic Related Group(s):
- 306 Cardiac congenital and valvular disorders with mcc
- 307 Cardiac congenital and valvular disorders without mcc
Applicable To
- 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
Code History
- 2024 (effective 10/1/2022): New code
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change
- 2025 (effective 10/1/2024): No change
Diagnosis Index entries containing back-references to Q21.21:
- incomplete > atrioventricular Q21.20
- partial > atrioventricular Q21.20
- separate atrioventricular valves > with Q21.23
- incomplete > septal Q21.23
- partial > septal Q21.23
- incomplete > cushion, endocardial Q21.20
- atrioventricular > Incomplete
- canal > atrioventricular Q21.21
- septal defect > atrioventricular Q21.21
- endocardial cushion defect > Incomplete