C34Malignant neoplasm of bronchus and lung

C34 is the ICD-10-CM diagnosis code for malignant neoplasm of bronchus and lung. It belongs to block C30-C39 (malignant neoplasms of respiratory and intrathoracic organs) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: C34.0 (bronchus), C34.1 (lung), C34.2 (lung), C34.3 (lung), C34.8 (lung) and C34.9 (lung).

Don't report C34 together with the conditions in its Excludes1 note: Kaposi's sarcoma of lung (C46.5-) and malignant carcinoid tumor of the bronchus and lung (C7A.090).

Use an additional 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.-) and 1 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.