Q21.9
BillableCongenital malformation of cardiac septum, unspecified
Congenital malformation of cardiac septum, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Septal (heart) defect NOS
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
Related Codes(6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(70)
SNOMED CT
- Congenital atresia of pulmonary artery10930001
- Imperforate pulmonary artery10930001
- Congenital cardiac septal defect59494005
- Congenital septal defect of heart59494005
- Atresia of pulmonary artery with septal defect204448004
- Congenital heart disease, septal and bulbar anomalies253264007
- Cardiac septal defects253273004
- Heart septal defects253273004
- Severe hypotonia, psychomotor developmental delay, strabismus, cardiac septal defect syndrome1187212004
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
Clinical Terms
- Imperforate pulmonary artery
- Septal Defects, Cardiac
- Congenital septal defects
- Congenital Septal Defect
- Congenital septal defect (morphologic abnormality)
- Heart Septal Defect
- Septal (heart) defect NOS
- Congenital cardiac septal defect
- Heart septal defects
- Cardiac Septal Defects
- Cardiac Septal Defect
- septal defect
- Congenital atresia of pulmonary artery
- Congenital heart disease, septal and bulbar anomalies
- congenital defects septal
- Defects, Cardiac Septal
- Septal Defects, Heart
- Congenital septal defect of heart
- Congenital heart defects, septal
- Septal Defect, Cardiac
- congenital heart septum defect
- Severe hypotonia, psychomotor developmental delay, strabismus, cardiac septal defect syndrome
- Septal Defect, Heart
- Defect, Cardiac Septal
- Atresia of pulmonary artery with septal defect
- Congenital septal defect of heart (disorder)
- Cardiac septal defects congenital
- Congenital cardiac septal defect NOS
- Holes in the Heart
- Defects, Heart Septal
- Defect, Heart Septal
Frequently Asked Questions
What is the ICD-10 code for congenital malformation of cardiac septum, unspecified?
The ICD-10-CM code for congenital malformation of cardiac septum, unspecified is Q21.9. The full clinical description is "Congenital malformation of cardiac septum, unspecified". Q21.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code Q21.9 mean?
ICD-10-CM code Q21.9 represents “Congenital malformation of cardiac septum, unspecified”. It is classified under Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities and is a billable/specific code that can be used on a claim.
Is Q21.9 a billable code?
Yes, Q21.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is Q21.9 in?
Q21.9 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).
What codes cannot be used with Q21.9?
Q21.9 has Excludes1 notes indicating codes that cannot be used together with it, including: acquired cardiac septal defect (I51.0).
What SNOMED CT codes does Q21.9 map to?
Q21.9 maps to 6 SNOMED CT concepts: 204448004, 253273004, 10930001, 59494005, 253264007, and 1 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for Q21.9?
Q21.9 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 Q21.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like congenital malformation of cardiac septum, unspecified 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 Q21.9?
Q21.9 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.