Malig neoplasm of upper-outer quadrant of unsp male breast

This code signifies a cancerous tumor located in the upper-outer quadrant of the breast tissue in a male patient, where the specific side (left or right) is not documented. It indicates a primary malignancy, meaning the cancer originated in this location rather than spreading from another site.

Apply this code when documentation confirms a primary malignant neoplasm in the upper-outer quadrant of a male breast, and the medical record does not specify whether it is the left or right breast. This is typically used when pathology reports confirm malignancy and the laterality is unknown or not recorded.

• Ensure the documentation explicitly states "male breast" to differentiate from female breast cancer codes.
• Only use this code when laterality (left or right) is truly unspecified; avoid using it if laterality can be inferred or is missing due to incomplete documentation.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter, unless another condition is clearly the principal diagnosis.