Neoplasm of uncertain behavior of unspecified ovary

This code signifies a tumor of the ovary where the pathologist cannot definitively determine if it is benign or malignant based on microscopic examination. It indicates an abnormal growth with features that are ambiguous, requiring further investigation or follow-up.

Apply this code when pathology reports describe an ovarian mass as "atypical," "borderline," "of uncertain malignant potential," or "neoplasm of uncertain behavior," and the specific ovary is not documented. It is appropriate when the definitive nature (benign vs. malignant) cannot be established at the time of coding.

• Ensure the documentation explicitly states "uncertain behavior" or similar terminology for an ovarian neoplasm.
• Avoid using this code if the pathology definitively identifies the neoplasm as benign or malignant; instead, code to the appropriate benign or malignant ovarian neoplasm.
• If the laterality (left or right ovary) is specified, use the more specific codes D39.11 or D39.12.