Can You Recommend The Type Of Dr. That Would Address

Can you recommend the type of dr. that would address low motility in the lower intestines affected by nerve function? A recent CT scan indicated sacralization of L5 with only a rudimentary disk space seen. And a narrowing along with a vacuum phenomenon in the L4 L5 space. The GI doc has verified things from his perspective as being fine. I'd like to go to the right specialist for this condition and am near a Mayo Clinic if that helps. Thanks. Janet