Q24.9 Congenital malformation of heart, unspecified

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Congenital anomaly of heart
• Congenital disease of heart

Applies from Q24 Other congenital malformations of heart

Excludes1 (never code together)

• endocardial fibroelastosis (I42.4)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 746.9 Unspecified congenital anomaly of heart (approximate)

Code annotations containing back-references to Q24.9

Back-references to Q24.9

• Use Additional: Q87.88 CTNNB1 syndrome ("congenital heart malformations (Q20.0-Q24.9)")

Back-references to Q24

• 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 Q24.9

• Acyanotic heart disease (congenital)
• Anomaly, anomalous (congenital) (unspecified type) › cardiac
• Anomaly, anomalous (congenital) (unspecified type) › heart
• Atelocardia
• Blue › baby
• Cyanotic heart disease › congenital
• Deformity › heart (congenital)
• Development › imperfect, congenital › heart
• Disease, diseased › heart (organic) › congenital
• Disease, diseased › heart (organic) › congenital › cyanotic
• Lesion (s) (nontraumatic) › cardiac › congenital
• Malformation (congenital) › heart

Nearby codes

• Q24.3 Pulmonary infundibular stenosis
• Q24.4 Congenital subaortic stenosis
• Q24.5 Malformation of coronary vessels
• Q24.6 Congenital heart block
• Q24.8 Other specified congenital malformations of heart
• Q24.9 Congenital malformation of heart, unspecified (this code)