Malig neoplasm of upper-outer quadrant of unsp female breast

This code signifies a cancerous tumor located in the upper-outer quadrant of a female patient's breast, where the specific breast (left or right) is not documented. This is a primary malignancy, meaning the cancer originated in this location.

Apply this code when documentation confirms a primary malignant neoplasm in the upper-outer quadrant of a female breast, but the laterality (left or right) is not specified. This is often used when pathology reports confirm malignancy but imaging or clinical notes do not clearly indicate which breast is affected.

• Ensure the documentation explicitly states "unspecified" or lacks laterality for the breast.
• Prioritize codes with laterality (e.g., C50.411, C50.412) if the medical record provides that information.
• This code should be followed by codes for any associated metastases or other relevant conditions.