Gastroenterologist: Scope, Training, and When to Seek Care

Gastroenterologists are internal medicine physicians with fellowship training in digestive system disorders—esophagus, stomach, small intestine, colon, rectum, pancreas, liver, gallbladder, and biliary tree.

Training Pathway

1. 4 years medical school
2. 3 years internal medicine residency
3. 3 years gastroenterology fellowship (ACGME-accredited)
4. Board certification: ABIM Gastroenterology

Diagnostic Capabilities

• Endoscopy: EGD (upper), colonoscopy, ERCP, EUS, enteroscopy
• Advanced imaging: Capsule endoscopy, MRI/MRCP, CT enterography
• Functional testing: Manometry, pH/impedance, breath tests, transit studies
• Histopathology: Biopsy interpretation with GI pathologists

Conditions Managed

Luminal GI

• GERD, Barrett's esophagus, eosinophilic esophagitis
• Peptic ulcer disease, H. pylori
• Celiac disease, malabsorption syndromes
• IBD: Crohn's, ulcerative colitis (biologics, small molecules)
• IBS, functional dyspepsia, SIBO
• Colorectal cancer screening/surveillance

Hepatopancreatobiliary

• Viral hepatitis (B, C, D), NAFLD/NASH, cirrhosis
• Autoimmune liver disease, Wilson's, hemochromatosis
• Acute/chronic pancreatitis, pancreatic cysts/neoplasms
• Gallstone disease, biliary strictures, cholangitis

Therapeutic Interventions

• Endoscopic: polypectomy, EMR/ESD, dilation, stenting, ablation (RFA, cryo), hemostasis
• ERCP: stone extraction, sphincterotomy, stenting
• EUS-FNA: staging, drainage (pseudocysts, biloma)
• Medical: immunosuppression, antiviral, biologic therapy

When to Refer

• Alarm symptoms: weight loss, GI bleeding, dysphagia, anemia, family GI cancer
• Refractory symptoms despite primary care management
• Abnormal screening (colonoscopy, LFTs, imaging)
• Complex chronic disease (IBD, cirrhosis, pancreatitis)

Gastroenterologists provide both diagnostic expertise and therapeutic endoscopy, bridging medical and procedural GI care.