Neoplasm of uncertain behavior of bladder

This code signifies a bladder lesion where pathology has identified abnormal cell growth, but it cannot definitively be classified as benign or malignant. The behavior of the neoplasm is currently indeterminate, requiring further investigation or monitoring. It represents a diagnostic uncertainty regarding the aggressive potential of the cellular changes within the bladder.

Use this code when pathology reports describe a bladder neoplasm as "uncertain behavior," "borderline malignancy," or "unknown malignant potential." Documentation must clearly indicate that the pathologist could not definitively classify the tumor as benign or malignant. This code is appropriate when the clinical picture and initial biopsy findings do not allow for a more specific diagnosis.

• Do not use this code if the pathology report definitively states benign or malignant; instead, code to the appropriate benign or malignant neoplasm.
• Always review the final pathology report. If subsequent findings clarify the tumor's behavior, update the diagnosis accordingly.
• This code often requires sequencing with symptoms or signs that prompted the investigation, such as hematuria.