Malignant neoplasm of ovrlp sites of unsp bronchus and lung

This code signifies a primary cancerous tumor that spans across multiple contiguous or overlapping regions within the bronchus and lung, where the specific bronchus is not identified. It indicates a malignancy originating in the respiratory system that has spread beyond the boundaries of a single anatomical site within the lung or bronchial tree.

Use this code when medical record documentation confirms a primary malignant neoplasm involving overlapping sites of the bronchus and lung, and the specific bronchus is not specified. This is appropriate when the tumor's exact origin within the bronchial tree is unclear due to its extensive nature, or when the documentation simply states "overlapping sites of bronchus and lung."

• Do not use this code if a more specific site within the bronchus or lung can be identified (e.g., upper lobe, main bronchus).
• Ensure documentation explicitly states "overlapping sites" or describes a tumor spanning multiple contiguous areas.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter, followed by any relevant secondary diagnoses.