Neoplasm of uncertain behavior of bladder

This code signifies a bladder lesion where the pathologist cannot definitively determine if it is benign or malignant after microscopic examination. It represents an abnormal growth within the bladder that exhibits features making its biological behavior uncertain. Further investigation or follow-up is typically required to ascertain its true nature.

Use this code when pathology reports describe a bladder neoplasm as "uncertain behavior," "of unknown malignant potential," or similar ambiguous terminology. This is appropriate when the physician has not yet confirmed a benign or malignant diagnosis, often following an initial biopsy or resection. Documentation must clearly state the uncertain nature of the bladder lesion.

• Do not use this code if a definitive diagnosis of benign (e.g., D30.3) or malignant (e.g., C67.-) bladder neoplasm has been established.
• Always review the final pathology report; this code is often provisional pending further studies or definitive diagnosis.
• Consider sequencing this code as the primary diagnosis when the uncertain bladder neoplasm is the reason for the encounter, such as for further diagnostic workup or surveillance.