Dr. Martin J. Neilan owns and operates a private medical practice that focuses on internal medicine. This includes air and fluid removal, gallbladder removal, coronary artery X-rays, coronary artery catheterization, dialysis, feeding tube insertion through stomach incision, large bowel biopsy, small bowel endoscopy, unhealthy nail tissue removal, and esophagus, stomach and duodenum endoscopies and biopsies.