Malignant neoplasm of lower-outer quadrant of female breast

This code signifies a primary cancerous tumor originating in the lower-outer quadrant of a female patient's breast. This specific anatomical location is crucial for accurate staging and treatment planning. The malignancy is characterized by uncontrolled cell growth with the potential for invasion and metastasis.

Use this code when documentation clearly specifies a primary malignant neoplasm located in the lower-outer quadrant of the female breast. This diagnosis is typically confirmed by biopsy and pathology reports. Supporting documentation includes physician notes detailing the tumor's location, size, and confirmed malignancy.

• Ensure the documentation explicitly states "lower-outer quadrant" for accurate site specificity.
• Do not use this code for secondary or metastatic breast cancer; use appropriate secondary malignancy codes.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any relevant staging or treatment codes.