Malignant neoplasm of main bronchus

This code signifies the presence of a primary cancerous tumor originating in the main bronchus, which are the two large airways branching off the trachea into the lungs. This malignancy is characterized by uncontrolled cell growth within the bronchial lining, potentially leading to airway obstruction and metastasis.

Apply this code when documentation explicitly states a primary malignant neoplasm of the main bronchus. This is appropriate for initial diagnoses, treatment encounters, and follow-up care related to this specific cancer. Supporting documentation includes pathology reports confirming malignancy and imaging studies identifying the tumor's location.

• Differentiate from secondary malignancies or benign bronchial tumors; this code is for primary malignant involvement only.
• Ensure the documentation specifies "main bronchus" to avoid confusion with other parts of the lung or respiratory system.
• Sequence according to the reason for the encounter; if treatment is for the malignancy, this code will typically be primary.