ICD-10-CM · Chapter 17 · Q00–Q99
Q21.3
Tetralogy of Fallot
Congenital malformations, deformations and chromosomal abnormalities
Quick facts
- Code
- Q21.3
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q21 — Congenital malformations of cardiac septa
- Specificity
- 4 characters
How coders use this code
ICD-10-CM Q21.3 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of tetralogy of fallot. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in Q21
- Q21Congenital malformations of cardiac septa
- Q21.0Ventricular septal defect
- Q21.1Atrial septal defect
- Q21.10Atrial septal defect, unspecified
- Q21.11Secundum atrial septal defect
- Q21.12Patent foramen ovale
- Q21.13Coronary sinus atrial septal defect
- Q21.14Superior sinus venosus atrial septal defect
- Q21.15Inferior sinus venosus atrial septal defect
- Q21.16Sinus venosus atrial septal defect, unspecified
- Q21.19Other specified atrial septal defect
- Q21.2Atrioventricular septal defect
- Q21.20Atrioventricular septal defect, unspecified as to partial or complete
- Q21.21Partial atrioventricular septal defect
- Q21.22Transitional atrioventricular septal defect
Want to learn coding?
Master ICD-10-CM in 90 days.
Medita's 90-day curriculum is calibrated to the CPC (AAPC), CCA, and CCS (AHIMA) exam blueprints. Day 1 is free.