Q21.3 is the authoritative medical code for Tetralogy of Fallot. This classification is used in medical billing and clinical recording to specify the clinical criteria for tetralogy of fallot (ICD-10-CM Q21.3), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Tetralogy of Fallot is a billable ICD-10-CM diagnosis code Q21.3. Inclusion terms: Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.. Excludes1 (not coded here): acquired cardiac septal defect I51.0.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for Q21.3 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- acquired cardiac septal defect I51.0
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with Q21.3?
Per official ICD-10-CM Excludes1 instructions, Q21.3 must not be reported together with: acquired cardiac septal defect (I51.0).
What conditions are included under Q21.3?
Tetralogy of Fallot includes: Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle..
Nearest Codes in This Family
Official ICD-10-CM classifications closest to Q21.3 in its code family, with their registry titles.
- Q21 — Congenital malformations of cardiac septa
- Q21.0 — Ventricular septal defect
- Q21.1 — Atrial septal defect
- Q21.2 — Atrioventricular septal defect
- Q21.4 — Aortopulmonary septal defect
- Q21.8 — Other congenital malformations of cardiac septa
- Q21.9 — Congenital malformation of cardiac septum, unspecified
Indexed Clinical Terms (16)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Anomaly, anomalous (congenital) (unspecified type), heart, septum, interventricular, with pulmonary stenosis or atresia, dextraposition of aorta and hypertrophy of right ventricle
- Anomaly, anomalous (congenital) (unspecified type), heart, septum, ventricular, with pulmonary stenosis or atresia, dextraposition of aorta and hypertrophy of right ventricle
- Anomaly, anomalous (congenital) (unspecified type), heart, tetralogy of Fallot
- Defect, defective, interventricular septal, in tetralogy of Fallot
- Defect, defective, interventricular septal, with dextroposition of aorta, pulmonary stenosis and hypertrophy of right ventricle
- Defect, defective, ventricular septal, in tetralogy of Fallot
- Dextraposition, aorta, in tetralogy of Fallot
- Fallot's, tetrad or tetralogy
- Hypertrophy, hypertrophic, ventricle, ventricular (heart), in tetralogy of Fallot
- Imperfect, closure (congenital), septum, interventricular, in tetralogy of Fallot
- Imperfect, closure (congenital), septum, ventricular, in tetralogy of Fallot
- Imperfect, closure (congenital), septum, ventricular, with pulmonary stenosis or atresia, dextraposition of aorta, and hypertrophy of right ventricle
- Stenosis, stenotic (cicatricial), pulmonary (artery) (congenital), in tetralogy of Fallot
- Stenosis, stenotic (cicatricial), pulmonary (artery) (congenital), with ventricular septal defect, transposition of aorta, and hypertrophy of right ventricle
- Syndrome, Fallot's
- Tetralogy of Fallot