Malig neoplasm of upper-outer quadrant of left female breast

This code identifies a primary cancerous tumor located in the upper-outer quadrant of the left breast in a female patient. This specific quadrant is a common site for breast malignancies. The neoplasm is malignant, indicating uncontrolled cell growth with the potential for invasion and metastasis.

Use this code when documentation clearly specifies a primary malignant neoplasm originating in the upper-outer quadrant of the left female breast. This typically follows a biopsy confirming malignancy and imaging studies (e.g., mammogram, MRI) localizing the tumor to this specific breast region. Supporting documentation includes pathology reports, operative reports, and physician notes detailing the tumor's location and laterality.

• Ensure the documentation explicitly states "upper-outer quadrant" and "left breast" for accurate coding.
• Verify the patient's gender is female, as laterality and quadrant codes differ for male breast neoplasms.
• Do not confuse with codes for overlapping lesions, central portion, or other specified sites of the breast; the documentation must pinpoint the upper-outer quadrant.