Q20.4 – Double inlet ventricle
ICD-10-CM 2027 diagnosis code · Congenital malformations of the circulatory system
ICD-10-CM code
Q20.4
- Code
Q20.4(claims format:Q204)- Description
- Double inlet ventricle
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q20-Q28 Congenital malformations of the circulatory system
- Parent codes
- Q20
Notes for Q20.4
Applicable to:
- Common ventricle
- Cor triloculare biatriatum
- Single ventricle
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Q20 – Congenital malformations of cardiac chambers and connections
Index terms for Q20.4
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in Q20
- Q20.0 – Common arterial trunkBillable
- Q20.1 – Double outlet right ventricleBillable
- Q20.2 – Double outlet left ventricleBillable
- Q20.3 – Discordant ventriculoarterial connectionBillable
- Q20.5 – Discordant atrioventricular connectionBillable
- Q20.6 – Isomerism of atrial appendagesBillable
- Q20.8 – Other congenital malformations of cardiac chambers and connectionsBillable
- Q20.9 – Congenital malformation of cardiac chambers and connections, unspecifiedBillable
Frequently asked questions
What is ICD-10 code Q20.4?
Q20.4 is the ICD-10-CM code for double inlet ventricle, in the block Q20-Q28 (Congenital malformations of the circulatory system).
Is Q20.4 a billable code?
Yes. Q20.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Q20.4 belong to?
It belongs to category Q20 – Congenital malformations of cardiac chambers and connections.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.