Malignant tumor of the gallbladder
To support a 30% rating, your records would need to show recurrent abdominal pain that occurs after meals or at night, combined with chronic diarrhea documented at three or more watery bowel movements per day. Gastroenterology or primary care notes that record the frequency, timing, and character of your bowel movements are especially useful, as are treatment records showing ongoing management of these symptoms.
For a 10% rating, records showing intermittent abdominal pain alongside diarrhea of one to two watery bowel movements per day would be relevant. Clinic notes, imaging, or procedure reports that document biliary complications such as strictures or leaks can help establish the connection between your surgery and your current symptoms.
Your own statements, and statements from people who live with you, describing how often you experience pain and how diarrhea affects your daily routine and ability to work can also help show the frequency and severity that separate one rating level from another.
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.