C34
ICD-10Non-billable categoryMalignant neoplasm of bronchus and lung
Official ICD-10-CM descriptor (FY2026)
Malignant neoplasm of bronchus and lung
C34 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- Kaposi's sarcoma of lung (C46.5-)
- malignant carcinoid tumor of the bronchus and lung (C7A.090)
Use additional code
Report an additional code to identify the associated condition.
- 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)
More specific codes under C34
- C34.0Malignant neoplasm of main bronchuscategory
- C34.1Malignant neoplasm of upper lobe, bronchus or lungcategory
- C34.2Malignant neoplasm of middle lobe, bronchus or lung
- C34.3Malignant neoplasm of lower lobe, bronchus or lungcategory
- C34.8Malignant neoplasm of overlapping sites of bronchus and lungcategory
- C34.9Malignant neoplasm of unspecified part of bronchus or lungcategory
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.