What symptoms should prompt a GI visit? Trouble swallowing, new or persistent heartburn, abdominal pain, rectal bleeding, black/tarry stools, unintentional weight loss, ongoing diarrhea or constipation, nausea, vomiting, pancreatic and bile duct disorders and gastrointestinal cancers (esophagus, stomach, small intestine, colon, pancreas, bile duct, liver and neuroendocrine tumors). We also evaluate you for abnormal labs such as low hemoglobin (anemia) or elevated liver enzymes.