Malig neoplasm of lower-inner quadrant of unsp female breast

This code signifies a cancerous tumor located in the lower-inner quadrant of an unspecified female breast. It indicates the presence of a primary malignant neoplasm within this specific anatomical region of the breast.

Apply this code when documentation confirms a primary malignant neoplasm originating in the lower-inner quadrant of the female breast, and the laterality (left or right) is not specified. This is typically used for initial diagnosis or when laterality cannot be determined from available records.

• Ensure documentation clearly states the tumor's location as the lower-inner quadrant and confirms malignancy.
• Avoid using this code if the laterality (left or right breast) is known; instead, select the more specific code for the affected breast.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter, followed by any relevant secondary diagnoses.