Neoplasm of uncertain behavior of liver, GB & bile duct

This code signifies a tumor of the liver, gallbladder, or bile ducts where the pathologist cannot definitively classify it as benign or malignant. The cellular characteristics are ambiguous, preventing a clear diagnosis of either non-cancerous or cancerous.

Apply this code when pathology reports describe a neoplasm of the liver, gallbladder, or bile ducts as "uncertain behavior," "borderline malignancy," or "indeterminate." This is typically an interim diagnosis while further studies are pending or if the tumor's biological potential remains unclear after thorough examination.

• Do not use this code if the pathology definitively states benign (e.g., adenoma) or malignant (e.g., hepatocellular carcinoma).
• Ensure the documentation specifies the primary site as liver, gallbladder, or bile ducts; otherwise, a more general "uncertain behavior" code may be needed.
• This code often requires subsequent coding updates if a definitive diagnosis of benign or malignant is later established.