Malig neoplasm of lower-outer quadrant of right male breast

This code signifies a cancerous tumor originating in the lower-outer quadrant of the right breast in a male patient. It specifically identifies a primary malignancy, not a metastatic lesion from another site. The tumor arises from the glandular or ductal tissue within this specific breast region.

Use this code when documentation clearly indicates a confirmed malignant neoplasm located in the lower-outer quadrant of the right male breast. This diagnosis is typically supported by biopsy results, imaging reports (e.g., mammogram, ultrasound, MRI), and a physician's definitive statement of primary breast cancer.

• Ensure the documentation specifies "male breast" and "right breast" to differentiate from female breast cancer or left-sided involvement.
• Verify the exact quadrant (lower-outer) is documented; avoid using unspecified quadrant codes if this detail is available.
• Confirm this is a primary malignancy; if it's a secondary metastatic site, a different code from the C79 series would be appropriate.