- How COHN Scheduling Works
- The Application Comes Before the Calendar
- Test Center or Live Remote: Choosing Your Delivery Method
- Fees That Shape Your Timeline
- What Your Three Hours Will Look Like
- Picking a Date Based on Your Weakest Domain
- A Backward Plan From Your Exam Day
- Dates That Matter After You Pass
- Frequently Asked Questions
- The COHN is offered through ABOHN with delivery by Assessment Systems Corporation, at a test center or by MonitorEDU live remote.
- Budget $550 total: a $150 application fee plus a $400 examination fee.
- You need 3000 occupational-health practice hours in the previous five years before you can sit for the exam.
- The exam has 160 questions (135 scored, 25 pretest) in a closed-book, three-hour session.
How COHN Scheduling Works
Candidates searching for COHN exam dates often expect a fixed national calendar with a few testing weekends per year. The reality of the Certified Occupational Health Nurse credential is more flexible and more procedural. The American Board for Occupational Health Nurses, Inc. (ABOHN) oversees the credential and its eligibility rules, while Assessment Systems Corporation (ASC) handles exam delivery, either at a testing center or through MonitorEDU live remote proctoring.
That split matters for your planning. ABOHN decides whether you are eligible and approves your application. ASC is the vendor through which the actual appointment is arranged. Your real "exam date" is therefore the product of two steps: getting approved, then booking an appointment within whatever authorization period your approval carries.
If you are still confirming that you qualify at all, start with our guide to COHN requirements, eligibility, and prerequisites before you worry about calendar dates. Scheduling an exam you are not yet eligible for is the most common way candidates lose weeks.
The Application Comes Before the Calendar
You cannot simply pick an open seat and show up. The sequence for the Certified Occupational Health Nurse exam runs roughly like this:
- Confirm eligibility. You need an RN license (or an international equivalent) and 3000 hours of occupational-health practice within the previous five years. Specified education alternatives exist, but they require approval from ABOHN.
- Submit the application and pay the application fee. The application fee is $150.
- Receive approval. Approval is what unlocks your ability to schedule.
- Pay the examination fee. The examination fee is $400, bringing the total to $550.
- Schedule your appointment through the delivery process, choosing either a test center or live remote delivery.
The practical consequence is that your earliest possible exam date is gated by how quickly you can document your practice hours. Occupational health nurses who changed roles recently, or who split time between occupational health and general nursing, should gather employer verification early. Hours worked in a plant clinic, a corporate wellness department, a workers' compensation case-management role, or an employee health office all point toward the kind of practice the credential recognizes, but you should check the handbook's definition of qualifying hours rather than assuming.
Test Center or Live Remote: Choosing Your Delivery Method
One genuine advantage of the COHN's delivery model is that you are not forced to travel to a regional site. ASC offers both center-based testing and MonitorEDU live remote delivery. Each option affects how you think about timing.
| Factor | Test Center | MonitorEDU Live Remote |
|---|---|---|
| Location | Travel to a testing site | Your own approved private space |
| Scheduling flexibility | Depends on seat availability near you | Often easier to fit around shift work |
| Environment control | Provided by the center | You are responsible for meeting room and equipment rules |
| Best for | Candidates with unreliable home internet or a noisy household | Candidates who want to avoid travel or test at an unusual hour |
| Prep needed | Plan the route and arrival time | Test your computer, camera, and connection beforehand |
Occupational health nurses frequently work non-traditional schedules, covering shifts at manufacturing sites, distribution centers, or hospital employee health departments. Live remote delivery can reduce the friction of taking an exam around those schedules. The tradeoff is that you take on responsibility for a compliant testing environment. Review the proctoring requirements in the handbook and run any required system check well ahead of exam day, not on the morning of.
Fees That Shape Your Timeline
Money and dates are linked. Because the fees are paid in two stages, many candidates sequence them deliberately: application first, then examination fee once approval arrives and a preferred date is in sight.
| Item | Amount |
|---|---|
| Application fee | $150 |
| Examination fee | $400 |
| Total | $550 |
If you plan to ask an employer to reimburse the cost, build that approval cycle into your timeline. Reimbursement requests sometimes take longer than the application itself. For the full financial picture, including recertification costs, see our COHN certification cost breakdown, and if you are still weighing whether the spend is justified, our ROI analysis of COHN certification walks through the decision.
What Your Three Hours Will Look Like
Whatever date you choose, the session itself is the same. The exam is 160 multiple-choice questions delivered over three hours, closed-book. Of those 160 items, 135 are scored and 25 are pretest questions that do not count toward your result. You will not be told which are which, so treat every question as live.
Do the math on pacing: three hours for 160 questions leaves a little over a minute per item on average. That is comfortable for recall questions and tight for dense scenario items, so your plan should include timed practice rather than untimed reading alone.
The scored items are distributed across three domains, and ABOHN's official allocation is expressed as item counts rather than percentage labels: 72, 40, and 23 scored items across the three listed domains, with Clinical Practice and Case Management as the largest.
Domain 1: Clinical Practice and Case Management
The heaviest domain by far. Expect scenario-driven questions about assessing and managing worker health, return-to-work planning, injury and illness case management, and coordinating care among employees, employers, and providers.
- Work-related injury and illness evaluation and follow-up
- Case management across the full course of a claim
- Return-to-work and fitness-for-duty decisions
- Health promotion and surveillance in the workplace
Domain 2: Risk and Compliance
Questions here test whether you can apply regulatory and hazard-control thinking to real workplaces.
- Workplace hazard identification and exposure control
- Regulatory and recordkeeping obligations
- Privacy, confidentiality, and ethical boundaries between employer and employee health information
Domain 3: Program Management and Quality Assurance
The smallest domain, but not one to skip. It covers how occupational health services are organized, measured, and improved.
- Program planning, budgeting, and outcome measurement
- Quality improvement and evidence-based practice
- Leadership and communication with management
For a deeper treatment of every content area, read our complete guide to the three COHN exam domains. Understanding the weighting is the single most useful input to choosing when to test, as the next section explains.
Picking a Date Based on Your Weakest Domain
Most candidates pick an exam date by working backward from a vague feeling of readiness. A more reliable method is to pick it based on how long your specific gaps will take to close.
Because Clinical Practice and Case Management carries the largest share of scored items, a weakness there costs you the most. Nurses coming from hospital bedside roles often have strong clinical instincts but less exposure to regulatory frameworks and program-level thinking. Nurses coming from safety, compliance, or wellness-program roles often have the opposite profile. Be honest about which describes you:
- Clinical background, light on compliance: Allow more lead time for Domain 2. Regulatory material is memorization-heavy and does not yield to instinct.
- Compliance or program background, light on case management: Allow more lead time for Domain 1, since it is the largest block and rewards scenario practice.
- Long tenure as a generalist occupational health nurse: You may be able to book sooner, but still confirm Domain 3 vocabulary around quality assurance and outcome measurement.
Key Takeaway
Do not book your appointment until you have taken at least one timed practice set across all three domains. Your results will show where your weeks should go, and a realistic date follows from that, not the other way around.
If you want to calibrate your readiness, our piece on how hard the COHN exam is offers context, and you can take a COHN practice test to see where you stand before you commit to a date.
A Backward Plan From Your Exam Day
Once you have an approved application and a target date, work backward in blocks tied to the domains. This is the one place a study schedule belongs in this article, because the order of topics follows the exam's own weighting.
Domain 1 foundation
- Work through case management and return-to-work scenarios, since this domain holds the most scored items
- Take a timed baseline set to expose weak spots
Domain 2 build
- Memorize regulatory and recordkeeping content, which does not respond well to last-minute cramming
- Practice confidentiality and ethics scenarios
Domain 3 pass
- Cover program planning, quality assurance, and outcome measurement
Mixed timed sets
- Simulate the three-hour, 160-question pace in a single sitting
- If testing remotely, complete your system check and room setup
This sequence is a template, not a prescription. Compress or stretch each block according to your own baseline results. For a fuller methodology, see our COHN study guide for first-attempt success, and keep our one-page COHN cheat sheet handy for final review.
Dates That Matter After You Pass
Scheduling does not end when you leave the testing session. The Certified Occupational Health Nurse credential runs on a five-year recertification cycle, so it is worth putting future deadlines on your calendar from the start.
- Active RN status must be maintained throughout the cycle.
- 3000 practice hours are required for recertification.
- 50 related continuing nursing education (CNE) hours must be completed.
- An annual maintenance/recertification fee of $150 applies.
Start tracking hours and CNE credits the day you pass rather than reconstructing them in year five. Candidates also frequently wonder how scoring works, since the passing standard is Angoff-based. ABOHN reports a 65% figure for 2025 but also lists 57 and 85 in its statistics, an unresolved discrepancy, so interpret any single number cautiously. We unpack what the available data does and does not tell you in our COHN pass rate analysis and our guide to the COHN passing score.
If you are thinking about what the credential does for your career, our COHN salary guide and COHN jobs overview cover the employer side, and if you are new to the credential itself, start with what COHN certification is.
Frequently Asked Questions
The exam is delivered through Assessment Systems Corporation at test centers or via MonitorEDU live remote proctoring, so your appointment depends on your approval and available seats rather than a single national date. Confirm current authorization periods and scheduling rules in the March 2026 ABOHN handbook.
The total is $550, made up of a $150 application fee and a $400 examination fee. Recertification later carries a separate $150 annual maintenance/recertification fee.
Yes, live remote delivery through MonitorEDU is an available option alongside test centers. You are responsible for meeting the room, equipment, and proctoring requirements, so complete any system check well before your appointment.
You need an RN license or international equivalent plus 3000 occupational-health practice hours in the previous five years, or an approved education alternative, and an approved application. See our COHN requirements guide for details.
You have three hours for 160 multiple-choice questions, of which 135 are scored and 25 are unscored pretest items. The exam is closed-book, and you will not know which questions are pretest.