Malignant neoplasm of bronchus and lung (C34) ICD-10-CM
The C34 code range covers malignant neoplasm of bronchus and lung with 22 ICD-10-CM diagnosis codes. 16 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code to identify:
- exposure to environmental tobacco smoke Z77.22
- exposure to tobacco smoke in the perinatal period P96.81
- history of tobacco dependence Z87.891
- occupational exposure to environmental tobacco smoke Z57.31
- tobacco dependence F17
- tobacco use Z72.0
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.
Codes in the C34 Range 22 codes · 16 billable
- C34 Malignant neoplasm of bronchus and lungNon-billable
- C34.0 Malignant neoplasm of main bronchusNon-billable
- C34.00 Malignant neoplasm of unspecified main bronchus
- C34.01 Malignant neoplasm of right main bronchus
- C34.02 Malignant neoplasm of left main bronchus
- C34.1 Malignant neoplasm of upper lobe, bronchus or lungNon-billable
- C34.10 Malignant neoplasm of upper lobe, unspecified bronchus or lung
- C34.11 Malignant neoplasm of upper lobe, right bronchus or lung
- C34.12 Malignant neoplasm of upper lobe, left bronchus or lung
- C34.2 Malignant neoplasm of middle lobe, bronchus or lung
- C34.3 Malignant neoplasm of lower lobe, bronchus or lungNon-billable
- C34.30 Malignant neoplasm of lower lobe, unspecified bronchus or lung
- C34.31 Malignant neoplasm of lower lobe, right bronchus or lung
- C34.32 Malignant neoplasm of lower lobe, left bronchus or lung
- C34.8 Malignant neoplasm of overlapping sites of bronchus and lungNon-billable
- C34.80 Malignant neoplasm of overlapping sites of unspecified bronchus and lung
- C34.81 Malignant neoplasm of overlapping sites of right bronchus and lung
- C34.82 Malignant neoplasm of overlapping sites of left bronchus and lung
- C34.9 Malignant neoplasm of unspecified part of bronchus or lungNon-billable
- C34.90 Malignant neoplasm of unspecified part of unspecified bronchus or lung
- C34.91 Malignant neoplasm of unspecified part of right bronchus or lung
- C34.92 Malignant neoplasm of unspecified part of left bronchus or lung
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C34 range.
Malignant Bronchial Neoplasm
A malignant neoplasm that affects the bronchial tree.
Malignant Respiratory System Neoplasm
A primary or metastatic malignant neoplasm that affects the lung parenchyma, bronchial tree, or trachea. Representative examples include lung carcinoma, carcinoid tumor, lung lymphoma, lung sarcoma, and tracheal carcinoma.
About the C34 Code Range
These cancers affect a main bronchus, an airway leading into a lung, or part of a lung.
The subdivisions separate the main bronchus (C34.0) from the upper (C34.1), middle (C34.2), and lower (C34.3) lobes. Other groups identify overlapping sites of the bronchus and lung (C34.8) or an unspecified part (C34.9). Most groups further distinguish right, left, or unspecified side; the middle-lobe group does not.
Questions About This Page
How many billable codes are in the C34 range?
Of the 22 codes in this range, 16 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C34 range classify?
The range classifies malignant neoplasm of bronchus and lung. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
