- Q21.4 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 Q21.4 became effective on October 1, 2022.
- This is the American ICD-10-CM version of Q21.4 – other international versions of ICD-10 Q21.4 may differ.
ICD-10-CM Q21.4 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
- Aortic septal defect
- Aortopulmonary window
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2016 (effective 10/1/2015): No change
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2024 (effective 10/1/2022): No change
Diagnosis Index entries containing back-references to Q21.4:
- between aorta and pulmonary artery > septum Q21.19
- between aorta and pulmonary artery > septum Q21.19
- between > Communication
- base of aorta and pulmonary artery > between Q21.4
- aorticopulmonary septum > Defect, defective Q89.9
- aortico-pulmonary > Fenestration, fenestrated
- septum > closure (congenital) Q45.8
- aorticopulmonary > septum Q21.4
- between aorta and pulmonary artery > septum Q21.4
- aorticopulmonary > Window