Malignant neoplasm of upper-outer quadrant of female breast

This code signifies a primary cancerous tumor originating in the upper-outer quadrant of the female breast. This specific location is a common site for breast malignancies. It indicates the presence of an invasive or in situ carcinoma within this region.

Apply this code when documentation clearly specifies a malignant neoplasm located in the upper-outer quadrant of the female breast. This diagnosis is typically confirmed by pathology reports following biopsy or surgical excision. Use this code for initial diagnosis and subsequent treatment encounters related to this specific primary tumor site.

• Ensure the documentation explicitly states "upper-outer quadrant" and "malignant neoplasm."
• Do not use this code for benign breast conditions or neoplasms of unspecified breast quadrants.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by codes for laterality and specific histology if known.