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C34 ⚠ Non-billable

Malignant neoplasm of bronchus and lung

ICD-10-CM · FY2026 · Neoplasms

Code
C34
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Official coding notes

From CMS's ICD-10-CM Tabular List.

Excludes1 — never code together
  • Kaposi's sarcoma of lung (C46.5-)
  • malignant carcinoid tumor of the bronchus and lung (C7A.090)
Use 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)

Frequently asked questions

What is ICD-10 code C34?
ICD-10-CM code C34 represents Malignant neoplasm of bronchus and lung. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C34 billable?
No. C34 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C34 in?
C34 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.

Related codes in the C34 category

C34.0 Malignant neoplasm of main bronchus Non-billable C34.1 Malignant neoplasm of upper lobe, bronchus or lung Non-billable C34.2 Malignant neoplasm of middle lobe, bronchus or lung Billable C34.3 Malignant neoplasm of lower lobe, bronchus or lung Non-billable C34.8 Malignant neoplasm of overlapping sites of bronchus and lung Non-billable C34.9 Malignant neoplasm of unspecified part of bronchus or lung Non-billable C34.00 Malignant neoplasm of unspecified main bronchus Billable C34.01 Malignant neoplasm of right main bronchus Billable

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