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Physician Board Certification

ABIM Gastroenterology Initial Certification Examination Practice Test

Gastroenterology practice questions address clinical evaluation and management across the digestive tract, liver, biliary system, and pancreas. The available scenarios include esophageal dysphagia, chronic diarrhea, inflammatory bowel disease, gastrointestinal bleeding, colorectal evaluation, and complications of cirrhosis. They also test recognition of medication effects and interpretation of clinical findings when selecting diagnostic or therapeutic next steps.

Exam overview

Exam providerAmerican Board of Internal Medicine
Exam codeNot listed
CategoryPhysician Board Certification

About the ABIM Gastroenterology Initial Certification Examination Exam

Clinical reasoning in gastroenterology involves connecting symptoms, laboratory findings, and endoscopic or imaging results to likely disease processes. Questions may ask you to distinguish structural obstruction from an esophageal motility disorder, identify when colon biopsies are useful despite normal-appearing mucosa, or determine an appropriate evaluation for suspected lower gastrointestinal bleeding. Other decisions involve medication toxicity in inflammatory bowel disease, cancer surveillance considerations in primary sclerosing cholangitis, and management principles for cirrhosis-related hyponatremia. Practice also draws on procedural judgment, including selecting colonoscopy after stabilization and bowel preparation or recognizing when esophageal dilation may relieve dysphagia. These tasks reflect the need to assess urgency, choose targeted testing, and weigh treatment options in the context of comorbidities and the patient’s clinical stability.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A 56-year-old woman with chronic kidney disease has fatigue and a serum phosphate concentration of 6.8 mg/dL. She has no symptoms of gastrointestinal obstruction and can take oral medication. Which intervention can reduce intestinal phosphate absorption?

  1. AA phosphate binder taken with meals
  2. BA proton pump inhibitor taken at bedtime
  3. CAn osmotic laxative taken after meals
  4. DAn oral iron chelator taken on an empty stomach
Show answerCorrect answer: A

Phosphate binders taken with meals bind dietary phosphate within the gut and reduce its absorption. The specific binder is selected according to clinical circumstances, including calcium level and kidney disease management.

Question 2

A 57-year-old woman with longstanding primary sclerosing cholangitis has persistent cholestatic liver-test abnormalities. Imaging shows no dominant obstructing lesion. Which associated condition is particularly important to evaluate for with colonoscopic surveillance, even if she has no bowel symptoms?

  1. AInflammatory bowel disease
  2. BCeliac disease
  3. CEosinophilic esophagitis
  4. DPeptic ulcer disease
Show answerCorrect answer: A

Primary sclerosing cholangitis is strongly associated with inflammatory bowel disease, especially ulcerative colitis, which may be clinically silent. Colonoscopy with biopsies is used to assess for colitis and to guide colorectal cancer surveillance when IBD is present.

Question 3

A 24-year-old woman with ulcerative colitis is in clinical remission on azathioprine. Her blood count shows a falling hemoglobin, leukocyte count, and platelet count. Which adverse effect of azathioprine is most likely?

  1. ABone marrow suppression
  2. BNephrotic syndrome
  3. CPulmonary fibrosis
  4. DAdrenal insufficiency
Show answerCorrect answer: A

Azathioprine can cause dose-related myelosuppression, including leukopenia, anemia, and thrombocytopenia. Regular blood-count monitoring is important during treatment.

Question 4

A 68-year-old man with cirrhosis and ascites is found to have a serum sodium concentration of 126 mmol/L. He has no seizures or other severe neurologic symptoms. Which general approach is most appropriate?

  1. ARapidly raise serum sodium to normal within several hours
  2. BAssess volume status and contributing factors, and correct sodium cautiously
  3. CAdminister hypertonic saline routinely to all patients with cirrhosis and hyponatremia
  4. DStart a vasopressin antagonist without evaluating the clinical context
Show answerCorrect answer: B

Hyponatremia in cirrhosis requires evaluation of volume status, medications, renal function, and other contributors. Correction should be cautious to avoid osmotic demyelination; hypertonic saline is generally reserved for selected severe or symptomatic cases.

Question 5

A 55-year-old patient with chronic watery diarrhea has a grossly normal colonoscopy. Which sampling approach is important when microscopic colitis is suspected?

  1. ABiopsies from multiple colonic segments
  2. BA single biopsy of the rectum only
  3. CBiopsy of the esophagus and stomach only
  4. DNo biopsies because the mucosa appears normal
Show answerCorrect answer: A

Microscopic colitis often causes chronic watery diarrhea despite normal-appearing colonic mucosa. Histologic evaluation requires colonic biopsies, typically from multiple segments, because changes can be patchy.

Question 6

A 42-year-old woman has recurrent episodes of solid food sticking behind the sternum. Endoscopy identifies a thin distal esophageal ring and no mass or inflammatory narrowing. Which intervention is commonly used to relieve dysphagia from this lesion?

  1. AEndoscopic balloon or bougie dilation
  2. BEsophageal myotomy
  3. CEndoscopic variceal ligation
  4. DLong-term nasogastric tube placement
Show answerCorrect answer: A

A symptomatic Schatzki ring is commonly treated with endoscopic dilation using a balloon or bougie. Acid suppression may be considered afterward to reduce recurrence. Myotomy is used for selected motility disorders, not a simple mucosal ring.

Question 7

A 72-year-old woman with atrial fibrillation taking apixaban presents with painless maroon stools. She is hemodynamically stable after initial assessment. Which diagnostic procedure is generally appropriate after stabilization and bowel preparation to evaluate suspected lower gastrointestinal bleeding?

  1. AColonoscopy
  2. BEsophageal manometry
  3. CCapsule endoscopy as the first test in all cases
  4. DEndoscopic retrograde cholangiopancreatography
Show answerCorrect answer: A

For a stabilized patient with suspected acute lower gastrointestinal bleeding, colonoscopy after appropriate bowel preparation is a standard diagnostic and potentially therapeutic approach. The timing and choice of testing are guided by ongoing bleeding, stability, and clinical context.

How to use this practice test

The free practice bank contains 50 questions. Each session presents up to 20 random questions, with results shown after the session. Use the cases to test clinical decisions in areas such as dysphagia, diarrhea, bleeding, inflammatory bowel disease, and liver complications, then review any missed reasoning.

Preparation tips

  • For dysphagia cases, compare symptom patterns and endoscopic findings to distinguish a structural lesion from a motility disorder, and match each to an appropriate evaluation or intervention.
  • Review diagnostic strategies for chronic watery diarrhea, including when colonic biopsies may be needed despite a grossly normal examination.
  • Practice evaluating gastrointestinal bleeding by considering hemodynamic stability, anticoagulant use, bowel preparation, and the appropriate endoscopic investigation.
  • Connect inflammatory bowel disease therapies with adverse effects and surveillance considerations, including cytopenias during azathioprine treatment and colorectal surveillance in primary sclerosing cholangitis.
  • Revisit cirrhosis complications such as ascites-associated hyponatremia, focusing on severity assessment and general management principles.
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