Q25.9 Congenital malformation of great arteries, unspecified

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

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 747.29 Other anomalies of aorta (approximate)

Code annotations containing back-references to Q25.9

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 Q25.9

• Anomaly, anomalous (congenital) (unspecified type) › artery (peripheral) › great
• Malformation (congenital) › great › artery
• Malformation (congenital) › pulmonary › artery

Nearby codes

• Q25.7 Other congenital malformations of pulmonary artery
• Q25.71 Coarctation of pulmonary artery
• Q25.72 Congenital pulmonary arteriovenous malformation
• Q25.79 Other congenital malformations of pulmonary artery
• Q25.8 Other congenital malformations of other great arteries
• Q25.9 Congenital malformation of great arteries, unspecified (this code)