Mark R Fleisher, MD

Mark R. Fleisher, MD, is an independent gastroenterologist at Ascension St. Vincent’s in Jacksonville, Florida. He diagnoses and treats gastrointestinal (GI) diseases and disorders in adults. Dr. Fleisher has clinical interest in caring for adults with biliary atresia, celiac disease, Crohn's disease, ulcerative colitis, chronic diarrhea, GI motility disorders, Hirschsprung's disease, liver disease, cystic fibrosis, chronic constipation, neurogastroenterology, inflammatory bowel disease (IBD), eosinophilic esophagitis (EoE), gastroesophageal reflux disease (GERD), pancreatitis, short bowel syndrome. When needed, Dr. Fleisher collaborates with other specialists, including surgeons, to provide the comprehensive care you need.