Q21
Non-billableCongenital malformations of cardiac septa
Congenital malformations of cardiac septa
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
Child Codes (7)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(30)
UMLS
- Cardiac Septal DefectC0018816
- Cardiac Septal DefectsC0018816
- Cardiac septal defects congenitalC0018816
- Congenital Septal DefectC0018816
- Congenital cardiac septal defectC0018816
- Congenital cardiac septal defect NOSC0018816
- Congenital heart defects, septalC0018816
- Congenital malformation of cardiac septum, unspecifiedC0018816
- Congenital malformations of cardiac septaC0018816
- Congenital septal defectC0018816
- Congenital septal defect (morphologic abnormality)C0018816
- Congenital septal defect of heartC0018816
- Congenital septal defect of heart (disorder)C0018816
- Congenital septal defectsC0018816
- Defect, Cardiac SeptalC0018816
- Defect, Heart SeptalC0018816
- Defects, Cardiac SeptalC0018816
- Defects, Heart SeptalC0018816
- Heart Septal DefectC0018816
- Heart Septal DefectsC0018816
- Holes in the HeartC0018816
- Septal (heart) defect NOSC0018816
- Septal Defect, CardiacC0018816
- Septal Defect, HeartC0018816
- Septal Defects, CardiacC0018816
- Septal Defects, HeartC0018816
- congenital defects septalC0018816
- congenital heart septum defectC0018816
- congenital septal defectC0018816
- septal defectC0018816
Frequently Asked Questions
What is the ICD-10 code for congenital malformations of cardiac septa?
The ICD-10-CM code for congenital malformations of cardiac septa is Q21. The full clinical description is "Congenital malformations of cardiac septa". Q21 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code Q21 mean?
ICD-10-CM code Q21 represents “Congenital malformations of cardiac septa”. It is classified under Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities and is a non-billable header code. Use a more specific child code for billing purposes.
Is Q21 a billable code?
No, Q21 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 7 child codes under Q21.
What chapter is Q21 in?
Q21 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).
What codes cannot be used with Q21?
Q21 has Excludes1 notes indicating codes that cannot be used together with it, including: acquired cardiac septal defect (I51.0).
What are the subcategories under Q21?
Q21 has 7 child codes, including: Q21.0 (Ventricular septal defect), Q21.1 (Atrial septal defect), Q21.2 (Atrioventricular septal defect), Q21.3 (Tetralogy of Fallot), and 3 more.
What are the UMLS CUIs for Q21?
Q21 is linked to 1 UMLS Concept Unique Identifier: C0018816. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Q21 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like congenital malformations of cardiac septa affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of Q21?
Q21 maps to the ICD-11 code: LA8Z (Structural developmental anomaly of heart or great vessels, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.