Malignant tumor of the bile ducts (cholangiocarcinoma)
To support a 30% rating, your records should show both recurrent abdominal pain tied to meals or nighttime and a pattern of three or more watery bowel movements per day. Gastroenterology or primary care notes documenting the frequency, timing, and character of pain and diarrhea are helpful, as are imaging or procedure reports confirming a stricture or biliary leak following gallbladder removal. A physician's statement connecting those findings to the post-surgical complication strengthens the record.
For a 10% rating, records should show intermittent abdominal pain alongside one to two watery bowel movements per day. Clinic notes, treatment records, and logs of symptoms over time can capture this pattern. At either level, your own written statement — or statements from people who live with you — describing how pain and diarrhea affect your daily activities, sleep, and work can help show the frequency and severity that the rating criteria require.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.