Malig neoplasm of lower-inner quadrant of left female breast

This code signifies a primary cancerous tumor located in the lower-inner quadrant of a female patient's left breast. This specific anatomical localization is crucial for accurate staging and treatment planning.

Apply this code when documentation clearly indicates a confirmed malignant neoplasm originating in the lower-inner quadrant of the left breast. This diagnosis is typically established through biopsy and pathology reports.

• Ensure laterality (left) and specific quadrant (lower-inner) are explicitly documented.
• Do not use for secondary malignancies or carcinoma in situ; these have distinct codes.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.