C34.3
ICD-10Non-billable categoryMalignant neoplasm of lower lobe, bronchus or lung
Official ICD-10-CM descriptor (FY2026)
Malignant neoplasm of lower lobe, bronchus or lung
C34.3 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.
ICD-10-CM FY2026 defines 3 codes beneath C34.3. See the ICD-10-CM index for what this site publishes.
Related codes in 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
- C34.8Malignant 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)
- Parent code
- C34
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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.