Malignant neoplasm of lower lobe, bronchus or lung

This code identifies a primary cancerous tumor originating in the lower lobe of the bronchus or lung. It signifies a malignant growth within the pulmonary tissue of the lower lung, distinct from metastatic disease.

Apply this code when documentation confirms a primary malignant neoplasm located specifically in the lower lobe of the lung, as identified through biopsy, imaging, or surgical pathology. This is appropriate for initial diagnosis and ongoing treatment of the primary site.

• Ensure documentation specifies "lower lobe" and "primary" to differentiate from other lung locations or metastatic disease.
• Do not use for secondary (metastatic) lung cancer; refer to codes in the 197.xx series for those cases.
• Sequence this code as the primary diagnosis when it is the reason for the encounter or treatment.