Malignant neoplasm of lower lobe, unsp bronchus or lung

This code signifies a primary cancerous tumor originating in the lower lobe of an unspecified bronchus or lung. It indicates a malignant growth within the pulmonary tissue, specifically localized to the lower portion of the lung.

Use this code when documentation confirms a primary malignant neoplasm of the lower lobe of the lung, but the specific bronchus (right or left) is not identified. This is appropriate for pathology reports or physician notes that specify "lower lobe lung cancer" without further laterality.

• Do not use if laterality (right or left lower lobe) is specified; use more specific codes like C34.31 or C34.32.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.
• Ensure documentation clearly states "malignant neoplasm" and "lower lobe" to support this code.