Fistula of gallbladder

This code describes an abnormal, often pathological, connection or tract originating from the gallbladder. This fistula can connect the gallbladder to another organ (e.g., duodenum, colon, stomach) or to the skin, allowing bile to leak. It typically results from inflammation, infection, or gallstone erosion.

Apply this code when documentation clearly indicates the presence of a fistula involving the gallbladder. This includes cholecystoenteric fistulas, cholecystocutaneous fistulas, or other specified abnormal communications. Supporting documentation would include operative reports, imaging studies (e.g., ERCP, MRCP), or physician notes detailing the fistula's presence and origin from the gallbladder.

• Differentiate between internal (e.g., cholecystoduodenal) and external (e.g., cholecystocutaneous) fistulas if specified.
• Code any underlying cause, such as cholelithiasis or cholecystitis, as an additional diagnosis.
• Do not confuse with biliary fistulas originating from other parts of the biliary tree (e.g., common bile duct).