Q33Header code — not billable
Congenital malformations of lung
- Chapter
- 17. Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q33
- Effective date
- October 1, 2026
Related codes in category Q33
Q33.0Congenital cystic lungYesQ33.1Accessory lobe of lungYesQ33.2Sequestration of lungYesQ33.3Agenesis of lungYesQ33.4Congenital bronchiectasisYesQ33.5Ectopic tissue in lungYesQ33.6Congenital hypoplasia and dysplasia of lungYesQ33.8Other congenital malformations of lungYesQ33.9Congenital malformation of lung, unspecifiedYes
Frequently asked questions
What is ICD-10 code Q33?
Q33 is an ICD-10-CM diagnosis code for Congenital malformations of lung.
Is Q33 a billable code?
No. Q33 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 Q33 in?
Q33 falls under Chapter 17: Congenital malformations, deformations and chromosomal abnormalities.
When did Q33 become effective?
Q33 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Q33?
Q33 belongs to category Q33, 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.