Neoplasm of uncertain behavior of right ovary

This code signifies a tumor of the right ovary whose biological behavior cannot be definitively classified as benign or malignant based on current pathological examination. It indicates that the cellular characteristics are atypical, but not overtly cancerous, requiring further investigation or follow-up.

Apply this code when pathology reports describe an ovarian mass from the right side as "atypical," "borderline," "of uncertain malignant potential," or "neoplasm of uncertain behavior." Documentation must clearly specify the right ovary as the affected site and the uncertain nature of the lesion.

• Ensure the pathology report explicitly states "right ovary" to avoid laterality errors.
• Do not use this code if the pathology definitively identifies the neoplasm as benign or malignant; use the appropriate C or D code instead.
• This code is often a primary diagnosis when a biopsy or excision has been performed and the final pathology is inconclusive regarding malignancy.