Unspecified lump in the left breast, upper outer quadrant

This code signifies the presence of a palpable, non-specific mass or swelling located in the upper outer quadrant of the patient's left breast. It indicates that the physician has identified a lump but has not yet determined its definitive etiology (e.g., cyst, fibroadenoma, malignancy).

Use this code when documentation clearly states an "unspecified lump" or "mass" in the left breast, specifically localized to the upper outer quadrant, and further diagnostic workup is pending or has not yielded a definitive diagnosis. It is appropriate for initial encounters where a breast lump is identified but its nature is still unknown.

• Do not use this code if a more specific diagnosis (e.g., fibroadenoma, cyst, malignant neoplasm) has been established.
• Ensure the documentation specifies "left breast" and "upper outer quadrant" to support this precise localization.
• If later diagnostic studies reveal a definitive diagnosis, update the code to reflect the specific condition.