Q34.9 Congenital malformation of respiratory system, unspecified

ICD-10-CM Diagnosis Code Q34.9: Congenital malformation of respiratory system, unspecified

ICD-10-CM code Q34.9 identifies an unspecified congenital malformation of the respiratory system. The terminology record is active for the 2026 version and classifies this concept as a congenital abnormality. It falls under the parent category Q34, which covers other congenital malformations of the respiratory system. 1 4

Plain-language overview

Code Q34.9 designates a congenital abnormality of the respiratory system, and the terminology record lists the exact preferred name as congenital malformation of respiratory system, unspecified. 1

What this code represents

The official preferred name for Q34.9 is congenital malformation of respiratory system, unspecified, and the terminology record maintains an active status for the 2026 ICD-10-CM version. 1

The concept Q34.9 is classified under the semantic type of congenital abnormality and has narrower concepts available within the broader terminology system. 1

Coding details

In the ICD-10-CM code tree, Q34.9 is nested under the parent category Q34, which is designated for other congenital malformations of the respiratory system. 1 4

Within the Q30-Q34 chapter block for congenital respiratory malformations, Q34.9 is listed alongside Q34.8, which is used for other specified congenital malformations of the respiratory system. 4 5

Documentation considerations

The code tree distinguishes Q34.9 as an unspecified malformation from Q34.8, which captures other specified congenital malformations of the respiratory system. 4 5

What the sources add

Multiple official terminology sources confirm the exact code Q34.9 and its preferred name, while a separate code tree source provides operational context by showing its placement among related respiratory codes. 1 2 4

A clinical literature database references congenital pulmonary airway malformations and the Stocker Classification, establishing a clinical context for abnormalities within the respiratory system. 3

Coverage and utilization context

The Q30-Q34 code tree lists Q34.9 alongside other unspecified respiratory malformation codes, such as Q30.9 for the nose, Q31.9 for the larynx, and Q33.9 for the lung. 4

Sources

1. ICD-10-CM Q34.9 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
3. Abnormality of the respiratory system (Concept Id: C4018871) - MedGen - NCBI — ncbi.nlm.nih.gov; accessed 2026-07-27.
4. ICD-10-CM 2024 | Q30-Q34 - Congenital malformations of the respiratory system — unboundmedicine.com; accessed 2026-07-27.
5. ICD-10 code: Other congenital malformations of respiratory system — gesund.bund.de; accessed 2026-07-27.