- Abdominal pain
- Acid peptic disease
- Acid reflux
- Acute gastritis
- Anemia
- Appetite loss
- Ascities (Fluid in belly)
- Atrophic gastritis
- Autoimmune hepatitis
- Barrett's esophagus
- Bloating
- Blood in stool (Hematochezia)
- Bowel incontinence
- Celiac disease
- Clostridium difficile infection
- Collagenous colitis
- Colon adenocarcinoma
- Colon angiodysplasia
- Colon polyp
- Constipation
- Cowden syndrome
- Crohn's disease
- Diarrhea
- Diverticular diseases
- Diverticulitis
- Duodenal ulcer
- Eosinophilic esophagitis
- Esophageal achalasia
- Esophageal disorder
- Esophageal spasm
- Esophageal stricture
- Esophageal varices
- Esophageal webs and rings
- Esophagitis (Esophagus Inflammation)
- Fatty liver disease
- Feeding disorders
- Gallstones
- Gastric outlet obstruction
- Gastrinoma
- Gastritis (Stomach inflammation)
- Gastroesophageal reflux disease (GERD)
- Gastroparesis
- Heartburn
- Helicobacter pylori (H. Pylori)
- Hemochromatosis
- Hemorrhoids
- Hemostasis of variceal bleeding
- Hepatic encephalopathy (HE)
- Hepatitis
- Hepatocellular carcinoma
- Hiatal hernia
- Inflammatory bowel disease (IBD)
- Irritable bowel syndrome (IBS)
- Jaundice
- Lactose intolerance
- Liver cirrhosis
- Liver cyst
- Liver diseases
- Liver hemangioma (Liver blood vessel tumors)
- Liver tumor
- Lower gastrointestinal bleeding
- Lymphocytic colitis
- Lynch syndrome
- Mesenteric ischemia
- Nausea
- Peptic ulcer disease
- Pernicious anemia
- Portal hypertension
- Pouchitis
- Primary biliary cirrhosis
- Rectal bleeding
- Rectal inflammation
- Rectal stricture
- Regional enteritis
- Schatzki ring (Esophageal ring)
- Short bowel syndrome
- Small intestinal bacterial overgrowth (SIBO)
- Stomach spasm
- Stress-induced gastritis
- Swallowing difficulty
- Swallowing disorders
- Ulcerative colitis (UC)
- Upper gastrointestinal bleeding
- Villous adenoma
- Vomiting
- Zenker diverticulum
- Colonoscopy
- J-pouch surgery
- Non-surgical hemorrhoid treatment
- Paracentesis
- PEG tube placement (Gastrostomy tube placement)