Q26Header code — not billable
Congenital malformations of great veins
- Chapter
- 17. Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q26
- Effective date
- October 1, 2026
Related codes in category Q26
Q26.0Congenital stenosis of vena cavaYesQ26.1Persistent left superior vena cavaYesQ26.2Total anomalous pulmonary venous connectionYesQ26.3Partial anomalous pulmonary venous connectionYesQ26.4Anomalous pulmonary venous connection, unspecifiedYesQ26.5Anomalous portal venous connectionYesQ26.6Portal vein-hepatic artery fistulaYesQ26.8Other congenital malformations of great veinsYesQ26.9Congenital malformation of great vein, unspecifiedYes
Frequently asked questions
What is ICD-10 code Q26?
Q26 is an ICD-10-CM diagnosis code for Congenital malformations of great veins.
Is Q26 a billable code?
No. Q26 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is Q26 in?
Q26 falls under Chapter 17: Congenital malformations, deformations and chromosomal abnormalities.
When did Q26 become effective?
Q26 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Q26?
Q26 belongs to category Q26, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.