Q33: Congenital malformations of lung
Codes under Q33 (Congenital malformations of lung). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q33.0 | Congenital cystic lung | ✓ |
| Q33.0 | Congenital cystic lung | ✓ |
| Q33.1 | Accessory lobe of lung | ✓ |
| Q33.1 | Accessory lobe of lung | ✓ |
| Q33.2 | Sequestration of lung | ✓ |
| Q33.2 | Sequestration of lung | ✓ |
| Q33.3 | Agenesis of lung | ✓ |
| Q33.3 | Agenesis of lung | ✓ |
| Q33.4 | Congenital bronchiectasis | ✓ |
| Q33.4 | Congenital bronchiectasis | ✓ |
| Q33.5 | Ectopic tissue in lung | ✓ |
| Q33.5 | Ectopic tissue in lung | ✓ |
| Q33.6 | Congenital hypoplasia and dysplasia of lung | ✓ |
| Q33.6 | Congenital hypoplasia and dysplasia of lung | ✓ |
| Q33.8 | Other congenital malformations of lung | ✓ |
| Q33.8 | Other congenital malformations of lung | ✓ |
| Q33.9 | Congenital malformation of lung, unspecified | ✓ |
| Q33.9 | Congenital malformation of lung, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code Q33?
Q33 is an ICD-10-CM category covering Congenital malformations of lung. It contains 18 more specific diagnosis codes, 18 of which are billable.
Is Q33 a billable code?
No — Q33 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 Q33.0 — Congenital cystic lung). 18 of the 18 codes under Q33 are billable.
What codes fall under Q33?
Q33 includes Q33.0, Q33.0, Q33.1, Q33.1, Q33.2, 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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