Malignant neoplasm of upper lobe, unsp bronchus or lung

This code signifies a cancerous tumor originating in the upper lobe of either the right or left lung, or within an unspecified bronchus leading to the upper lobe. It indicates a primary malignancy, meaning the cancer started in this location rather than spreading from another site.

Use this code when documentation confirms a primary malignant neoplasm located in the upper lobe of the lung, but the specific bronchus (e.g., right upper lobe bronchus, left upper lobe bronchus) is not specified. This code is appropriate when the laterality (right or left lung) is also not documented or is unknown.

• Avoid using this code if the laterality (right or left lung) is clearly documented; instead, use a more specific code (e.g., C34.11 or C34.12).
• Ensure the documentation explicitly states "upper lobe" and "malignant neoplasm" to support this code.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.