ICD-10 code for aorta overriding

The ICD-10-CM code for aorta overriding is Q25.49 (Other congenital malformations of aorta).

Within Q25.4, choose Q25.49 (Other congenital malformations of aorta) only when documentation doesn't support a more specific option: congenital malformation of aorta unspecified (Q25.40), absence and aplasia of aorta (Q25.41), hypoplasia of aorta (Q25.42), congenital aneurysm of aorta (Q25.43), congenital dilation of aorta (Q25.44), Double aortic arch (Q25.45), Tortuous aortic arch (Q25.46), right aortic arch (Q25.47) and 1 more.

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.