- The CGRN exam has 175 four-option questions, a three-hour limit, and a scaled passing score of 450 (200-800 scale).
- Gastroenterological Procedures is the largest domain at 35%, followed by Patient Care Interventions at 25%.
- Exam fee is $430 for SGNA members and $520 for nonmembers, administered by ABCGN through Prometric.
- Eligibility requires 2 years full-time (or 4,000 part-time-equivalent hours) of GI/endoscopy nursing within the last five years.
Exam Snapshot: The Numbers You Need
If you only have five minutes before you need to memorize the shape of this exam, start here. The Certified Gastroenterology Registered Nurse (CGRN) credential is administered by the American Board of Certification for Gastroenterology Nurses (ABCGN), with delivery handled through Prometric testing centers or live remote proctoring. Every candidate faces the same structure: 175 four-option multiple-choice questions, three hours on the clock, and a criterion-referenced scaled score requirement of 450 out of a possible 200-800.
ABCGN does not publish which items are scored versus pretest/unscored, so treat every question on screen as if it counts. For a deeper breakdown of how that score is calculated and what it actually represents, see the CGRN Passing Score 2026 guide.
Registration, Fees, and Eligibility
Before you can sit for the exam, you need to clear ABCGN's eligibility screen. The requirements are specific and worth memorizing exactly as written:
- An unrestricted RN license in the United States or Canada
- Current engagement in GI or endoscopy nursing practice
- At least two years of full-time experience, or 4,000 part-time-equivalent hours, within the preceding five years, in a qualifying clinical, supervisory, administrative, educational, or research RN role
- Two responsible specialty practitioners who can verify your experience and qualifications
On cost: the exam fee is $430 for SGNA members and $520 for nonmembers. That differential alone often justifies SGNA membership if you're not already a member. A full breakdown of every fee, renewal cost, and hidden expense is covered in the CGRN Certification Cost 2026 breakdown. If you're still confirming whether your work history and license status qualify you to apply, the CGRN Requirements 2026 guide walks through every eligibility scenario in detail.
Key Takeaway
Confirm your eligibility hours and practitioner references months before your target test date. Verification delays are the most common reason candidates miss a planned testing window.
The Four Domains at a Glance
The CGRN blueprint has been stable since October 2017, and it organizes the entire exam into four weighted content areas. Knowing these percentages should shape every hour you spend studying.
| Domain | Weight | Approx. Items (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 1: General Nursing Care (21%)
Covers the RN fundamentals applied to GI patients - assessment, documentation, patient education, care coordination, and psychosocial support across the care continuum.
- Pre- and post-procedure assessment sequencing
- Patient/family education for GI conditions and prep instructions
- Age-specific and culturally competent care considerations
Domain 2: Gastroenterological Procedures (35%)
The largest and most heavily tested domain. Expect deep coverage of endoscopic and non-endoscopic GI procedures, equipment, and periprocedural nursing responsibilities.
- Upper and lower endoscopy, ERCP, EUS, capsule endoscopy specifics
- Scope handling, reprocessing steps, and accessory device use
- Sedation levels and monitoring tied to specific procedure types
Domain 3: Patient Care Interventions (25%)
Focuses on clinical decision-making during and after procedures - recognizing complications, managing medications, and intervening appropriately.
- Recognizing and responding to procedural complications (bleeding, perforation, aspiration)
- Medication administration and reversal agents
- Post-sedation recovery criteria and discharge readiness
Domain 4: Environmental Safety, Infection Prevention and Control (19%)
The smallest domain by weight but frequently underestimated. Covers infection control standards specific to endoscopy suites and reprocessing environments.
- High-level disinfection and sterilization protocols for endoscopes
- Standard precautions, exposure control, and environmental hazard management
- Regulatory and accreditation standards for GI procedure areas
For a complete walk-through of every task statement, subtopic, and sample scenario within each domain, the CGRN Exam Domains 2026 guide is the most thorough companion resource to this cheat sheet.
Question Format and Testing Logistics
Every item on the CGRN exam is a standard four-option multiple-choice question - no multi-select, no drag-and-drop, no case-cluster formats. That consistency is an advantage: you can train your pacing precisely. With 175 questions and 180 minutes, you have roughly one minute per item, though most candidates move faster on straightforward recall questions to bank time for scenario-based Domain 2 and Domain 3 items that require more reasoning.
Testing happens at Prometric centers across the United States and Canada, or via live remote ProProctor if you have a compliant private testing location. Scheduling logistics, blackout considerations, and how far in advance to book are covered in the CGRN Exam Dates 2026 guide.
High-Yield Topics by Domain
Because Gastroenterological Procedures carries more weight than any other domain, it deserves a disproportionate share of your study hours. Below is a condensed list of topics that repeatedly surface across the four domains - treat this as a checklist, not a full syllabus.
- Endoscope reprocessing sequence - precleaning, leak testing, manual cleaning, high-level disinfection, drying, and storage, in order
- Sedation categories - minimal, moderate, deep, and general, with corresponding monitoring requirements
- Bowel prep regimens - split-dose protocols, contraindications, and patient teaching points
- Complication recognition - post-polypectomy bleeding, perforation signs, vasovagal response management
- Informed consent and documentation - what must be captured before, during, and after a GI procedure
- Infection control standards - transmission-based precautions specific to endoscopy suites
If you're unsure how these topics compare in difficulty to other specialty nursing certifications, the How Hard Is the CGRN Exam? guide puts the content load and pass-rate data in perspective.
Final-Week Review Plan
A cheat sheet works best paired with a short, domain-weighted review schedule. This is not a full study plan - for that, see the CGRN Study Guide 2026 - but here is how the final stretch should look if you're using domain weight to allocate your remaining hours.
Gastroenterological Procedures Deep Dive
- Review endoscopic procedure types, scope handling, and reprocessing steps
- Drill practice questions weighted toward Domain 2 since it represents 35% of the exam
Patient Care Interventions and General Nursing Care
- Focus on complication recognition, medication management, and periprocedural assessment
- Mix in Domain 1 patient education and documentation scenarios
Environmental Safety and Full-Length Practice
- Lock in infection control and disinfection protocols from Domain 4
- Take a full 175-question timed practice run to calibrate pacing
Running full-length, timed practice sets on our CGRN practice test platform is the fastest way to see which domain is actually weakest before exam day, rather than guessing based on how confident you feel while reading.
Certification Validity and Renewal
CGRN certification is valid for five years from the date you pass. Renewal happens one of two ways: retake the exam, or complete 75 contact hours of continuing education. Of those 75 hours, 60 must be GI-specific, and 30 must come from GI-specific Category 1 live nursing seminars or workshops. Plan renewal credits well ahead of your expiration date - GI-specific live seminar hours are harder to accumulate quickly than general online CE.
Understanding the long-term value of maintaining this credential, including how it factors into hiring and pay conversations, is covered in the CGRN Salary Guide 2026 and the Is the CGRN Certification Worth It? ROI analysis.
Key Takeaway
Track your 60 GI-specific and 30 live-seminar hours separately from general CE credits - mixing them up is a common renewal-cycle mistake.
Quick-Reference FAQ
The exam contains 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. See the CGRN Passing Score 2026 guide for more detail on how this scale works.
Gastroenterological Procedures, at 35% of the exam, is the largest domain and should receive the largest share of your review time, followed by Patient Care Interventions at 25%.
The exam fee is $430 for SGNA members and $520 for nonmembers, paid through the ABCGN application process.
Certification lasts five years. Renewal requires either retaking the exam or completing 75 contact hours, including 60 GI-specific hours and 30 GI-specific Category 1 live seminar or workshop hours.
Keep this page bookmarked as your quick reference, but pair it with full practice exams on our CGRN practice question platform so the numbers above translate into actual test-day performance rather than just memorized facts.