ICD-10-CM
ICD-10 code for Canal atrioventricular: Q21.20
The ICD-10-CM index points "Canal atrioventricular" to Q21.20, Atrioventricular septal defect, unspecified as to partial or complete. Q21.20 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- Q21.23common, Complete atrioventricular septal defectBillable
- Q21.21incomplete, Partial atrioventricular septal defectBillable
- Q21.22intermediate, Transitional atrioventricular septal defectBillable
- Q21.21partial, Partial atrioventricular septal defectBillable
- Q21.22transitional, Transitional atrioventricular septal defectBillable
More specific codes in Q21
A header groups codes and is not billed. A billable code is one you can report.
- Q21Congenital malformations of cardiac septaHeader
- Q21.0Ventricular septal defectBillable
- Q21.1Atrial septal defectHeader
- Q21.10Atrial septal defect, unspecifiedBillable
- Q21.11Secundum atrial septal defectBillable
- Q21.12Patent foramen ovaleBillable
- Q21.13Coronary sinus atrial septal defectBillable
- Q21.14Superior sinus venosus atrial septal defectBillable
- Q21.15Inferior sinus venosus atrial septal defectBillable
- Q21.16Sinus venosus atrial septal defect, unspecifiedBillable
- Q21.19Other specified atrial septal defectBillable
- Q21.2Atrioventricular septal defectHeader
- Q21.20Atrioventricular septal defect, unspecified as to partial or completeBillable
- Q21.21Partial atrioventricular septal defectBillable
- Q21.22Transitional atrioventricular septal defectBillable
- Q21.23Complete atrioventricular septal defectBillable
- Q21.3Tetralogy of FallotBillable
- Q21.4Aortopulmonary septal defectBillable
- Q21.8Other congenital malformations of cardiac septaBillable
- Q21.9Congenital malformation of cardiac septum, unspecifiedBillable
Excludes1
Excludes1 means these codes are not reported together.
From Q21. A note on a category applies to every code under it.
Related conditions
Related pages
- Q21.20 code detailsNotes, nearby codes, CMS-HCC group
- Category Q21Every code under it
- Chapter 17Congenital malformations and chromosomal abnormalities
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Canal atrioventricular?
The ICD-10-CM index points "Canal atrioventricular" to Q21.20, Atrioventricular septal defect, unspecified as to partial or complete. Q21.20 is a billable code.
Is Q21.20 billable?
Yes. Q21.20 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to Q21.20?
The CDC tabular list gives 1 Excludes1 note (not coded together) for Q21.20 and the categories above it. They are listed on this page.
What chapter is Q21.20 in?
Chapter 17. Congenital malformations and chromosomal abnormalities.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.