Neoplasm of uncertain behavior of unspecified ureter

This code signifies a tumor in an unspecified ureter that cannot definitively be classified as benign or malignant based on current pathological examination. It indicates that the biological behavior of the neoplasm is currently indeterminate.

Apply this code when pathology reports describe a ureteral lesion as "uncertain behavior," "borderline," or "of unknown malignant potential," and the specific ureter (left or right) is not documented. This is appropriate when further diagnostic workup is pending or when the final pathology remains inconclusive regarding malignancy.

• Ensure documentation explicitly states "uncertain behavior" or similar terminology; do not assume based on morphology alone.
• Avoid using this code if the pathology definitively identifies the neoplasm as benign (e.g., papilloma) or malignant (e.g., carcinoma).
• If the specific ureter is known (left or right), a more specific code from the D41.2 subcategory should be used.