Other congenital malformations of respiratory system (Q34) ICD-10-CM
The Q34 code range covers other congenital malformations of respiratory system with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- congenital central alveolar hypoventilation syndrome G47.35
Codes in the Q34 Range 5 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q34 range.
Hydrothorax
A collection of watery fluid in the pleural cavity. (Dorland, 27th ed)
About the Q34 Code Range
The ICD-10 code Q34 covers various congenital malformations of the respiratory system that do not fall into more common specific categories. These codes are essential for documenting rare or unspecified birth defects affecting respiratory structures.
This section includes codes for specific anomalies such as Q34.0 for pleural anomalies (also known as congenital anomaly of pleural folds or hydrothorax), and Q34.1 for congenital cysts in the mediastinum. The Q34.8 category captures other specified congenital defects like congenital pulmonary alveolar capillary dysplasia or congenital atresia of the pharynx, addressing uncommon or complex respiratory abnormalities. Finally, Q34.9 is used when a congenital malformation of the respiratory system is recognized but not otherwise specified, including abnormalities of the nose, nasopharynx, or bronchopulmonary foregut. These codes assist healthcare providers and coders in accurately identifying and reporting rare respiratory congenital defects through the ICD-10 coding system, such as the ICD-10 code for congenital cyst of mediastinum or ICD-10 code for anomaly of pleura.
Questions About This Page
How many billable codes are in the Q34 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Q34 range classify?
The range classifies other congenital malformations of respiratory system. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
