ICD-10 code for subaortic stricture

The ICD-10-CM code for subaortic stricture is Q24.4 (Congenital subaortic stenosis). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q24.4.

Within Q24 (other congenital malformations of heart), Q24.4 is specifically for congenital subaortic stenosis. Related codes cover Dextrocardia (Q24.0), Levocardia (Q24.1), cor triatriatum (Q24.2), pulmonary infundibular stenosis (Q24.3), malformation of coronary vessels (Q24.5), congenital heart block (Q24.6), other specified congenital malformations of heart (Q24.8) and congenital malformation of heart, unspecified (Q24.9).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" 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.