ICD-10 code for atrioventricular canal

The ICD-10-CM code for atrioventricular canal is Q21.20 (Atrioventricular septal defect, unspecified as to partial or complete). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q21.20.

Within Q21.2, choose Q21.20 (unspecified as to partial or complete) only when documentation doesn't support a more specific option: partial atrioventricular septal defect (Q21.21), Transitional atrioventricular septal defect (Q21.22) and complete atrioventricular septal defect (Q21.23).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 306 (Cardiac Congenital and Valvular Disorders with MCC, relative weight 1.546) and DRG 307 (Cardiac Congenital and Valvular Disorders without MCC, relative weight 0.9148), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.