Malignant neoplasm of lower lobe, left bronchus or lung

This code signifies a primary cancerous tumor originating in the lower lobe of the left lung or its associated bronchus. It indicates a malignant growth, meaning it has the potential to invade surrounding tissues and metastasize to distant sites.

Apply this code when documentation clearly specifies a primary malignant neoplasm located in the lower lobe of the left lung. This diagnosis is typically confirmed by biopsy and imaging studies, with the pathology report being the definitive source.

• Ensure the laterality (left) and specific lobe (lower) are explicitly documented.
• Distinguish between primary lung cancer and metastatic disease to the lung; this code is for primary.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter or treatment.