Q26 – Congenital malformations of great veins
ICD-10-CM 2027 diagnosis code · Congenital malformations of the circulatory system
ICD-10-CM code
Q26
- Code
Q26(claims format:Q26)- Description
- Congenital malformations of great veins
- Billable
- No – use a more specific code below
- 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
Billable codes under Q26
Q26 is a header code and cannot be used on claims. Choose the most specific code:
- Q26.0 – Congenital stenosis of vena cavaBillable
- Q26.1 – Persistent left superior vena cavaBillable
- Q26.2 – Total anomalous pulmonary venous connectionBillable
- Q26.3 – Partial anomalous pulmonary venous connectionBillable
- Q26.4 – Anomalous pulmonary venous connection, unspecifiedBillable
- Q26.5 – Anomalous portal venous connectionBillable
- Q26.6 – Portal vein-hepatic artery fistulaBillable
- Q26.8 – Other congenital malformations of great veinsBillable
- Q26.9 – Congenital malformation of great vein, unspecifiedBillable
Frequently asked questions
What is ICD-10 code Q26?
Q26 is the ICD-10-CM code for congenital malformations of great veins, in the block Q20-Q28 (Congenital malformations of the circulatory system).
Is Q26 a billable code?
No. Q26 is a header code with more specific child codes; report one of the billable codes listed above.
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.