Malignant neoplasms of respiratory and intrathoracic organs (C30-C39) ICD-10-CM
The C30–C39 section covers malignant neoplasms of respiratory and intrathoracic organs with 51 ICD-10-CM diagnosis codes, of which 40 are billable in fiscal year 2026. The section is organized into the 8 code ranges listed below.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- malignant neoplasm of middle ear
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- mesothelioma C45
Code Ranges in This Section 8 ranges · 51 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the C30–C39 Code Range
ICD-10 codes C30 through C39 are used specifically to classify various types of malignant tumors affecting the respiratory system and nearby intrathoracic organs. These codes help identify cancers of the nasal cavity, sinuses, larynx, trachea, bronchus, lungs, thymus, heart, mediastinum, pleura, and other less clearly defined respiratory sites.
This range includes detailed codes for different locations such as C30.0 for malignant neoplasm of the nasal cavity (also known by terms like olfactory neuroblastoma or squamous cell carcinoma of nasal sinuses), and C31 codes covering accessory sinuses including maxillary and ethmoidal sinuses. The larynx (voice box) cancers are captured under C32 with distinctions for glottis, supraglottis, and subglottis cancers, using synonyms such as carcinoma of vocal cords or epiglottis. Malignant tumors of the trachea and bronchus fall under C33 and C34, which include specific topographies like main bronchus or lung lobes, with common references like non-small cell lung cancer and Pancoast tumor. The thymus and intrathoracic organs are coded with C37 and C38, marking malignancies such as thymomas, malignant neoplasms of the heart, mediastinum, or pleura. Finally, C39 represents malignant neoplasms of other ill-defined respiratory and intrathoracic sites. This coding range ensures precise documentation of respiratory and thoracic malignancies essential for diagnosis, treatment planning, and epidemiological tracking.
Questions About This Page
How many codes are in the C30-C39 range?
The C30-C39 range contains 51 ICD-10-CM diagnosis codes in FY 2026. 40 of them are billable, and the rest are category headers that organize the section.
What conditions does C30-C39 cover?
The range covers malignant neoplasms of respiratory and intrathoracic organs. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
