Q26: Congenital malformations of great veins
Codes under Q26 (Congenital malformations of great veins). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q26.0 | Congenital stenosis of vena cava | ✓ |
| Q26.0 | Congenital stenosis of vena cava | ✓ |
| Q26.1 | Persistent left superior vena cava | ✓ |
| Q26.1 | Persistent left superior vena cava | ✓ |
| Q26.2 | Total anomalous pulmonary venous connection | ✓ |
| Q26.2 | Total anomalous pulmonary venous connection | ✓ |
| Q26.3 | Partial anomalous pulmonary venous connection | ✓ |
| Q26.3 | Partial anomalous pulmonary venous connection | ✓ |
| Q26.4 | Anomalous pulmonary venous connection, unspecified | ✓ |
| Q26.4 | Anomalous pulmonary venous connection, unspecified | ✓ |
| Q26.5 | Anomalous portal venous connection | ✓ |
| Q26.5 | Anomalous portal venous connection | ✓ |
| Q26.6 | Portal vein-hepatic artery fistula | ✓ |
| Q26.6 | Portal vein-hepatic artery fistula | ✓ |
| Q26.8 | Other congenital malformations of great veins | ✓ |
| Q26.8 | Other congenital malformations of great veins | ✓ |
| Q26.9 | Congenital malformation of great vein, unspecified | ✓ |
| Q26.9 | Congenital malformation of great vein, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code Q26?
Q26 is an ICD-10-CM category covering Congenital malformations of great veins. It contains 18 more specific diagnosis codes, 18 of which are billable.
Is Q26 a billable code?
No — Q26 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Q26.0 — Congenital stenosis of vena cava). 18 of the 18 codes under Q26 are billable.
What codes fall under Q26?
Q26 includes Q26.0, Q26.0, Q26.1, Q26.1, Q26.2, plus 13 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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