Neoplasm of uncertain behavior of 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. These neoplasms exhibit some atypical features but lack clear evidence of invasion or metastasis.

Use this code when pathology reports describe an ovarian mass as "borderline," "low malignant potential," or "uncertain malignant potential." It is appropriate when the physician's final diagnosis reflects this ambiguity, often following initial biopsy or surgical excision.

• Do not use this code if the pathology definitively identifies the tumor as benign or malignant; use the appropriate benign or malignant neoplasm code instead.
• Ensure the documentation explicitly states the uncertain nature of the ovarian neoplasm.
• This code is typically a primary diagnosis when the uncertain behavior is the focus of treatment or investigation.