Neoplasm of uncertain behavior of unspecified urinary organ

This code signifies a tumor within any part of the urinary system (kidneys, ureters, bladder, urethra) where the pathologist cannot definitively classify it as benign or malignant. The cellular characteristics are ambiguous, preventing a clear diagnosis of either non-cancerous growth or invasive cancer.

Use this code when pathology reports describe a urinary tract lesion as "uncertain behavior," "borderline malignancy," or "indeterminate potential," and the specific organ is not documented. It's appropriate when the physician's documentation reflects an inconclusive diagnosis regarding the tumor's malignant potential within the urinary system.

• Only use this code when the specific urinary organ is not identified in the documentation. If known, use a more specific D41.x code.
• Do not use this code if the pathology definitively states benign (e.g., D30.x) or malignant (e.g., C64-C68).
• Always query the provider for clarification if the behavior or site can be further specified.