Q26.9
Billable codeCongenital malformation of great vein, unspecified
The ICD-10 code for congenital malformation of great vein, unspecified is Q26.9.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Congenital anomaly of vena cava (inferior) (superior) NOS
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •Laterality-specific codes exist for this condition — confirm the affected side is documented.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Q26.0Congenital stenosis of vena cava
- Q26.1Persistent left superior vena cava
- Q26.2Total anomalous pulmonary venous connection
- Q26.3Partial anomalous pulmonary venous connection
- Q26.4Anomalous pulmonary venous connection, unspecified
- Q26.5Anomalous portal venous connection
- Q26.6Portal vein-hepatic artery fistula
- Q26.8Other congenital malformations of great veins
- Q26.9Congenital malformation of great vein, unspecified
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 74740Approximate match
Associated MS-DRGs
Q26.9 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.