1.2 Eligibility & Application

Who Can Sit For The CGRN Exam

The CGRN is a specialty certification layered on top of RN licensure, so eligibility starts with an existing license and adds a gastroenterology practice requirement.

License Requirement

You must hold a current, unrestricted registered nurse (RN) license in the United States or Canada. "Unrestricted" means the license is active and not subject to probation, suspension, or disciplinary limitations. Critically, all of your qualifying experience must have been earned at the RN level of practice — hours worked as a licensed practical nurse (LPN), nursing assistant, or student do not count.

Gastroenterology Practice Hours

ABCGN requires substantial recent GI/endoscopy experience, expressed two ways:

• A minimum of two years of GI/endoscopy employment, or
• A minimum of 4,000 hours of GI/endoscopy practice, and
• The qualifying experience must fall within the prior 5 years.

The recency rule matters: GI work older than five years generally will not count, which keeps the credential tied to current practice. Track your hours carefully — a nurse who floats between a med-surg floor and the endoscopy suite counts only the GI/endoscopy portion.

Qualifying Roles

GI nursing experience does not have to be purely bedside. Qualifying time can come from:

• Clinical / procedural endoscopy nursing (EGD, colonoscopy, ERCP, EUS)
• Supervisory or charge roles in a GI unit
• Administrative or program-management roles in gastroenterology
• Teaching or academic roles focused on GI nursing
• Research roles in gastroenterology nursing

A specific industry rule applies: nurses in industry/vendor roles must have at least 40% of their role focused on clinical practice, education, or research. Pure sales work is not eligible, even when the product is a GI device.

The Application And Attestation

The process is built around posted deadlines, not rolling enrollment:

Attestation is a formal legal statement of accuracy. Misrepresenting hours, role focus, or license status can invalidate eligibility and the credential itself, so document your GI practice before you certify the application.

Application Windows And Identification

ABCGN runs two cycles each year. The spring application window is January 1–February 28 (testing May 1–31); the fall window is June 1–July 31 (testing October 1–31). Scheduling details arrive by mid-March (spring) and mid-August (fall). There is no year-round walk-in option.

On exam day you must present valid, government-issued photo identification with a name that matches your application exactly. Name mismatches (e.g., a maiden name on the ID versus a married name on the application), expired ID, or forgotten ID are common, avoidable reasons candidates are turned away with a forfeited, non-refundable fee. Confirm Prometric's current ID and check-in rules before your appointment and arrive early for security screening.

Reading The Two-Year Versus 4,000-Hour Rule

The "two years or 4,000 hours" wording trips up part-time nurses. The two paths are alternatives, not a sum:

• A nurse working full-time in endoscopy for two years satisfies the two-year path automatically.
• A nurse working per-diem or part-time may not reach two calendar years of equivalent practice, so they instead count actual GI hours toward the 4,000-hour threshold.
• 4,000 hours ≈ two years of full-time 40-hour weeks, so the two paths are designed to be roughly equivalent.

Worked example: A nurse who works three 12-hour endoscopy shifts per week logs about 36 hours/week, or roughly 1,800 hours/year. Reaching 4,000 hours takes that nurse a little over two years of consistent part-time work — and every one of those hours must fall inside the rolling 5-year window at the time of application.

Documentation Checklist Before You Apply

Because the fee is non-refundable once the window closes, verify the following before submitting:

• RN license is active and unrestricted (check for any pending board action)
• GI/endoscopy hours meet 2 years or 4,000 hours, all within the prior 5 years
• Hours were worked at the RN level, not as an LPN or assistant
• Any industry role has ≥40% clinical/education/research focus (no pure sales)
• Two gastroenterology-field references have agreed to verify your experience
• A current copy of your RN license is ready to upload
• Your legal name on the application will match your photo ID exactly

Common Eligibility Traps

1. Counting non-GI hours. Med-surg, PACU, or general OR time does not count unless it is GI/endoscopy-specific.
2. Stale experience. A nurse who left endoscopy three years ago may have hours that are now aging out of the 5-year window.
3. Missing the window. Applications are accepted only Jan 1–Feb 28 and Jun 1–Jul 31; there is no grace period, and a late application waits a full cycle.
4. Weak references. Both references must be able to verify your GI work experience, so choose colleagues who supervised or worked alongside you, not generic character references.