ICD-10-CM C34: Malignant neoplasm of bronchus and lung

ICD-10-CM Diagnosis Code (2025)

Official Description for C34

Malignant neoplasm of bronchus and lung

Coding Notes & Guidelines for C34

Excludes1: Not Coded Here
  • 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)
Inclusion Terms
  • Malignant neoplasm of carina
  • Malignant neoplasm of hilus (of lung)
Inclusion Terms

Lung cancer NOS

Child Codes (More Specific Codes for C34):

C34.0 - Malignant neoplasm of main bronchus 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 lung 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 lung 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 lung 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 lung 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

About ICD-10-CM Code C34 (Malignant neoplasm of bronchus and lung)

ICD-10-CM code C34 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C34 became effective on October 1, 2024.

This page provides detailed information about C34 - Malignant neoplasm of bronchus and lung. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant neoplasm of bronchus and lung.