Gallbladder Disorders

A while back, I had some pain in my upper right abdomen. My doctor ordered some gallbladder tests. I don't have stones, but the test did show there is a blockage; my gallbladder is working at only 4%. The pain does not bother me that much, it is just annoying sometimes. I've been watching my intake of fatty foods and am trying to be healthier. Does this condition always require surgery to remove the gallbladder?