Certain specified biliary diseases

**Definition:** This is a group of conditions characterised as being in or associated with the biliary tract, the passageway for bile, which are not classified elsewhere.

**Exclusions:** - Malignant neoplasms of hepatobiliary system - Carcinoma in situ of gallbladder, biliary tract or ampulla of Vater - Benign neoplasm of gallbladder, extrahepatic bile ducts or ampulla of Vater