Malig neoplasm of lower-inner quadrant of left male breast

This code signifies a primary cancerous tumor located in the lower-inner quadrant of the left breast in a male patient. It specifically identifies the anatomical site and laterality of the malignancy.

Apply this code when documentation confirms a primary malignant neoplasm originating in the lower-inner quadrant of the left male breast. This typically follows a biopsy or surgical pathology report confirming malignancy and specifying the exact location.

• Ensure the documentation explicitly states "male breast" to differentiate from female breast cancer.
• Verify the specific quadrant (lower-inner) and laterality (left) are clearly documented.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter, followed by any relevant secondary codes.