ICD-10 Code C34.11 – Malignant neoplasm of upper lobe, right bronchus or lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C34.11 – Malignant neoplasm of upper lobe, right bronchus or lung
What it is
This code identifies a malignant tumor located in the upper lobe of the right lung or the right upper lobe bronchus. Use it when the record clearly documents this exact anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Common findings in lung cancer may include cough, hemoptysis, chest pain, dyspnea, or an abnormal imaging result confirming a right upper lobe mass.
When to use this code
Use C34.11 when the provider documents primary malignant neoplasm in the upper lobe of the right bronchus or lung. It applies to confirmed cancer at this site, including pathology, imaging, or operative documentation that specifies the location.
If the note only says “lung cancer” or the side and lobe are not identified, check documentation before assigning this code. Code the documented site as written and avoid assumptions based on symptoms alone.
Do not use for
Do not use this code for metastatic disease to the lung, unspecified lung cancer, or tumors in another lobe or the left lung. Check documentation if the site is not clearly stated.
Coding tip
Match the code to the exact anatomic site in the record; “right upper lobe” supports C34.11 only when the malignancy is primary and documented there.