ICD-10 Code C34.82 – Malignant neoplasm of overlapping sites of left bronchus and lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C34.82 – Malignant neoplasm of overlapping sites of left bronchus and lung
What it is
This code identifies a malignant tumor involving overlapping sites of the left bronchus and left lung. Use it when the documentation shows cancer spanning more than one adjacent site and no single site is specified.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include cough, hemoptysis, dyspnea, chest pain, or abnormal imaging showing a left-sided bronchopulmonary mass with extension across adjacent structures.
When to use this code
Use this code when the provider documents a primary malignant neoplasm affecting overlapping sites in the left bronchus and lung. It also fits pathology, imaging, or operative notes that clearly describe involvement of more than one contiguous site. If the exact site is unclear, check documentation before coding.
Do not use for
Do not use this code for benign lung lesions, metastatic disease to the lung, or a malignant neoplasm limited to a single bronchial or lung site. Check documentation if the record does not clearly support overlapping-site involvement.
Coding tip
Look for the words “overlapping,” “contiguous,” or “extension into adjacent sites” in the provider record before assigning C34.82.