ICD-10 Code C34.81 – Malignant neoplasm of overlapping sites of right bronchus and lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C34.81 – Malignant neoplasm of overlapping sites of right bronchus and lung
What it is
This code identifies a malignant tumor involving overlapping sites of the right bronchus and right lung. Use it when the documentation specifies that the cancer spans more than one adjacent site on the right side.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include cough, hemoptysis, dyspnea, chest pain, or an abnormal imaging result that leads to biopsy-confirmed malignancy.
When to use this code
Use this code when the provider documents primary cancer in overlapping right bronchial and pulmonary sites, not a single discrete lobe or bronchus. It also applies when the record states “overlapping sites” for the right lung. Check pathology, imaging, and provider wording if the exact site is unclear.
Do not use for
Do not use it for metastatic disease to the lung or for a tumor limited to one specific right lung lobe or bronchus. If the documentation does not clearly support an overlapping-site primary malignancy, check documentation.
Coding tip
Code the most specific site documented; if “overlapping” is not explicitly stated, verify whether another C34 code fits better.