- 175 questions, 3 hours, scaled passing score of 450 on a 200-800 scale.
- Gastroenterological Procedures is the largest domain at 35% of the exam.
- Fee is $430 for SGNA members and $520 for nonmembers, paid to ABCGN/Prometric.
- Eligibility needs 2 years full-time or 4,000 part-time-equivalent hours in the last five years.
Exam Snapshot: The Numbers You Need
If you only have five minutes before you walk into the testing center, this is the section to reread. The Certified Gastroenterology Registered Nurse (CGRN) exam is administered by the American Board of Certification for Gastroenterology Nurses (ABCGN) through Prometric, either at a physical test center in the United States or Canada, or via live remote proctoring (ProProctor) from a compliant private location.
- Format: 175 four-option multiple-choice questions
- Time limit: 3 hours
- Passing score: criterion-referenced scaled score of 450 on a 200-800 scale
- Fees: $430 (SGNA member) / $520 (nonmember)
- 2025 data: the small candidate pool tested; 67% pass rate in ABCGN's most recently published statistics
- Blueprint version: current 4-domain outline in effect since October 2017
ABCGN does not publish a scored-versus-unscored item split, so treat every question on the screen as if it counts. For a deeper walk-through of what these numbers actually mean for your prep timeline, see the full CGRN Study Guide 2026: How to Pass on Your First Attempt.
Domain Breakdown at a Glance
The CGRN blueprint has four domains, and they are not weighted evenly. Roughly one out of every three questions on your exam will come from Gastroenterological Procedures, so your study hours should mirror that weighting, not be spread evenly across all four.
| Domain | Weight | Approx. Questions (of 175) |
|---|---|---|
| Gastroenterological Procedures | 35% | ~61 |
| Patient Care Interventions | 25% | ~44 |
| General Nursing Care | 21% | ~37 |
| Environmental Safety, Infection Prevention and Control | 19% | ~33 |
Domain 2: Gastroenterological Procedures (35%)
This is the anchor domain of the exam. Expect heavy coverage of endoscopic procedures, pre-, intra-, and post-procedure nursing responsibilities, and device/equipment knowledge specific to GI practice.
- Upper and lower endoscopy, ERCP, EUS procedural flow
- Scope handling, reprocessing checkpoints, and accessory devices
- Sedation monitoring tied directly to specific procedures
Domain 3: Patient Care Interventions (25%)
This domain tests nursing judgment before, during, and after GI interventions - not just procedural steps.
- Medication administration and moderate sedation monitoring
- Complication recognition (bleeding, perforation, aspiration)
- Patient and family education across the care continuum
Domain 1: General Nursing Care (21%)
Broader nursing competencies applied to the GI setting: assessment, documentation, legal/ethical practice, and care coordination.
- Age-specific and cultural considerations in GI care
- Documentation standards and continuity of care
- Professional practice, scope-of-practice questions
Domain 4: Environmental Safety, Infection Prevention and Control (19%)
The smallest domain by weight, but frequently underestimated. Infection control errors in GI units carry high real-world stakes, and the exam reflects that.
- Endoscope reprocessing standards and traceability
- Radiation and chemical safety in procedure rooms
- Standard precautions, exposure control plans
For an item-by-item breakdown of subtopics inside each domain, the companion resource CGRN Exam Domains 2026: Complete Guide to All 4 Content Areas goes deeper than a cheat sheet can.
Registration, Fees, and Eligibility
Before you can sit for the exam, ABCGN requires proof that you're actively practicing in the specialty, not just credentialed on paper. The eligibility requirements boil down to:
- An unrestricted RN license in the United States or Canada
- Current engagement in GI or endoscopy practice
- At least 2 years full-time, or 4,000 part-time-equivalent hours, within the preceding 5 years, in a qualifying clinical, supervisory, administrative, educational, or research RN role
- Two responsible specialty practitioners who can verify your experience and qualifications
On the financial side, budget for the exam fee itself ($430 members / $520 nonmembers) plus any SGNA membership dues if you plan to join for the discount, study materials, and possible Prometric travel. A full cost breakdown, including often-overlooked line items like retake fees, is covered in CGRN Certification Cost 2026: Complete Pricing Breakdown. If you're still confirming you actually qualify, cross-check your hours and role against CGRN Requirements 2026: Eligibility, Prerequisites & How to Qualify before you pay the application fee.
Key Takeaway
Don't submit your application until your two verifiers and your hour logs are locked in - incomplete applications delay your Prometric scheduling window and can push your target test date past your renewal or job deadline.
Question Format and What to Expect
Every question on the CGRN exam is a standard four-option multiple-choice item - there are no matching, drag-and-drop, or multi-select formats. That simplicity is a double-edged sword: it means no exotic question types to learn, but it also means the exam relies on nuanced distractors (wrong answers that sound almost right) to differentiate candidates.
With 175 questions in 180 minutes, you have roughly one minute per question, though ABCGN does not publish a scored-versus-unscored breakdown, so plan your pacing as if all 175 count. A practical approach:
- Flag and move on if a question takes longer than 90 seconds
- Reserve the last 15-20 minutes strictly for flagged-item review
- Answer every question - there's no penalty for guessing on an unanswered scaled-score exam
If you want a realistic feel for pacing and distractor style before test day, working through timed sets on the CGRN practice test platform is the closest simulation you'll get outside the actual Prometric center.
Must-Know Clinical Topics by Domain
Cheat sheets fail when they stay abstract. Here are the concrete, testable topics candidates report seeing tested repeatedly, organized by domain weight so you know where to spend your marginal hour of study.
High-Yield in Gastroenterological Procedures
- ERCP indications, cannulation technique basics, and post-ERCP pancreatitis prevention
- EGD and colonoscopy prep protocols and quality indicators (e.g., withdrawal time, cecal intubation)
- EUS staging use cases versus other imaging modalities
- Capsule endoscopy candidacy and contraindications
- Endoscope reprocessing steps in the correct sequence
High-Yield in Patient Care Interventions
- Moderate sedation reversal agents and monitoring parameters
- Recognizing early signs of perforation, aspiration, and post-polypectomy bleeding
- Nutrition support routes relevant to GI disease (PEG, PEJ, TPN triggers)
- Pain and symptom management across acute and chronic GI conditions
High-Yield in General Nursing Care
- Informed consent specifics for endoscopic procedures
- Documentation elements required for procedural nursing notes
- Age-related considerations: pediatric versus geriatric GI patients
High-Yield in Environmental Safety, Infection Prevention and Control
- High-level disinfection versus sterilization thresholds
- Fluoroscopy radiation safety practices during ERCP
- Outbreak investigation basics tied to scope reprocessing failures
These specifics are also exactly why employers value the credential - hiring managers in endoscopy suites and GI clinics use CGRN as a proxy for exactly this kind of applied knowledge. If you're weighing the credential against career upside, CGRN Salary Guide 2026: Complete Earnings Analysis and Is the CGRN Certification Worth It? Complete ROI Analysis 2026 lay out the return side of the equation, and CGRN Jobs covers where the credential shows up as a preferred or required qualification.
Recertification and Renewal Math
CGRN certification is valid for five years. When your cycle ends, you have two paths:
- Re-examination: sit for the current version of the CGRN exam again
- Contact hours: complete 75 total contact hours, including at least 60 GI-specific hours and 30 GI-specific Category 1 live nursing seminar or workshop hours
Most working CGRNs choose the contact-hour route since it can be built into normal continuing education across the five-year cycle rather than crammed into one testing window. Start tracking GI-specific hours early - the "60 GI-specific" and "30 live seminar" sub-requirements are stricter than a generic CE count, and generic nursing CE hours outside GI won't satisfy them.
Key Takeaway
Log your GI-specific and live-seminar hours separately from general CE credits the moment you're certified - reconstructing five years of records at renewal time is far harder than tracking them as you go.
Final-Week Review Plan
In the last stretch before your Prometric appointment, resist the urge to start new material. Instead, sequence your remaining hours by domain weight, since that's how the scoring is weighted.
Gastroenterological Procedures Deep Review
- Re-drill ERCP, EGD, colonoscopy, and EUS indications
- Review reprocessing sequence until it's automatic
Patient Care Interventions
- Sedation monitoring and reversal agent scenarios
- Complication-recognition question drills
General Nursing Care + Safety/Infection Control
- Consent, documentation, and age-specific care review
- High-level disinfection and radiation safety facts
Light Review Only
- Skim weak-area flashcards, no new content
- Confirm Prometric or ProProctor logistics and ID requirements
Running one or two full-length timed sets on the practice test hub during this window helps confirm your pacing holds up under exam-length conditions, not just in short study bursts.
FAQ
The CGRN exam has 175 four-option multiple-choice questions, and candidates are given three hours to complete it.
You need a criterion-referenced scaled score of 450 on a 200-800 scale. This is not a raw percentage of correct answers.
Gastroenterological Procedures, at 35% of the exam, is the single largest domain and should receive the largest share of your study time.
The exam fee is $430 for SGNA members and $520 for nonmembers, paid through the ABCGN/Prometric registration process.
Certification lasts five years. Renew by re-examination or by completing 75 contact hours, including 60 GI-specific hours and 30 GI-specific Category 1 live seminar or workshop hours.
For a broader orientation to the credential itself - what it stands for, who administers it, and how it fits into a GI nursing career - see What Is CGRN?, CGRN Meaning, or CGRN Certification. And if you're mapping out a training path before you even schedule your exam date, check CGRN Training and CGRN Exam Dates 2026: Testing Windows, Deadlines & Scheduling for scheduling logistics.