ICD-10 code for Interauricular septal defect

The ICD-10-CM code for Interauricular septal defect is Q21.19 (Other specified atrial septal defect).

Within Q21.1, choose Q21.19 (Other specified atrial septal defect) only when documentation doesn't support a more specific option: unspecified (Q21.10), secundum atrial septal defect (Q21.11), Patent foramen ovale (Q21.12), coronary sinus atrial septal defect (Q21.13), superior sinus venosus atrial septal defect (Q21.14), inferior sinus venosus atrial septal defect (Q21.15) and sinus venosus atrial septal defect, unspecified (Q21.16).

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.