Malignant neoplasm of lower-inner quadrant of female breast

This code identifies a cancerous tumor originating in the lower-inner quadrant of a female patient's breast. It specifies the precise anatomical location of the primary malignancy within the breast tissue.

Apply this code when documentation clearly indicates a confirmed diagnosis of a primary malignant neoplasm located specifically in the lower-inner quadrant of the female breast. This is typically supported by pathology reports, imaging studies, and physician's notes detailing the tumor's exact site.

• Ensure the documentation explicitly states "lower-inner quadrant" for accurate site specificity.
• Do not use this code for neoplasms of unspecified or overlapping quadrants; separate codes exist for those scenarios.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.