Q25.21 Interruption of aortic arch

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Applicable to

• Atresia of aortic arch

MS-DRG index

Defines the logic of DRG(s) 306-307 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 747.11 Interruption of aortic arch

Code annotations containing back-references to Q25.21

Back-references to Q25

• Code Also: I27.21 Secondary pulmonary arterial hypertension ("congenital heart disease (Q20-Q28)")
• Type 2 Excludes: P29 Cardiovascular disorders originating in the perinatal period ("congenital malformations of the circulatory system (Q20-Q28)")
• Code Also: Z71.87 Encounter for pediatric-to-adult transition counseling ("congenital malformations of the circulatory system (Q20-Q28)")

Diagnosis Index entries for Q25.21

• Atresia, atretic › aortic (orifice) (valve) › arch
• Interruption › aortic arch
• Malformation (congenital) › aorta › atresia › aortic arch

Nearby codes

• Q25 Congenital malformations of great arteries
• Q25.0 Patent ductus arteriosus
• Q25.1 Coarctation of aorta
• Q25.2 Atresia of aorta
• Q25.21 Interruption of aortic arch (this code)
• Q25.29 Other atresia of aorta
• Q25.3 Supravalvular aortic stenosis
• Q25.4 Other congenital malformations of aorta
• Q25.40 Congenital malformation of aorta unspecified
• Q25.41 Absence and aplasia of aorta