What is the format of the COHN exam?

The COHN exam is a computer-based test administered at PSI testing centers across the United States. Candidates have three hours to complete the exam, which uses multiple-choice questions with four answer options each. Results are provided immediately after submission at the testing center.

How many scored questions appear on the COHN exam?

The COHN exam contains 160 multiple-choice questions, of which 150 are scored and 10 are unscored pretest items used for future exam development. Candidates cannot identify which questions are pretest items, so every question should be answered carefully within the three-hour time limit.

What is the passing score for the COHN exam?

ABOHN uses a scaled scoring system where candidates must achieve a scaled score of 500 or higher to pass the COHN exam. The raw passing score is determined through a criterion-referenced method based on a modified Angoff study, ensuring the cut score reflects minimum competency for safe practice.

What topics does the COHN exam cover?

The exam covers four main domains: clinical and primary care (direct worker health services), case management (coordinating injury and illness recovery), worker and workplace health hazard assessment, and regulatory and legislative compliance including OSHA standards. Health promotion and disease prevention are integrated throughout these domains.

How do I register for the COHN exam?

Applicants register directly through the ABOHN website by submitting an online application, proof of RN licensure, documentation of occupational health experience, and the exam fee. Once ABOHN approves the application, candidates receive an Authorization to Test and schedule their exam appointment through PSI within a 90-day eligibility window.

What study resources work best for COHN preparation?

Effective preparation combines the AAOHN Core Curriculum for Occupational Health Nursing textbook, ABOHN's official candidate handbook and content outline, practice questions covering all four domains, and review of OSHA regulations and workers' compensation laws. Many candidates also attend AAOHN review courses offered as live workshops or self-paced online modules.

COHN Practice Test

Updated for August 2026

Dr. Alexandra KimAug 1, 202612 min read

⏱️3 HoursTime Limit

📝160Questions

✅70%Pass Rate

💵$450Exam Fee

Note: The COHN exam is administered by ABOHN and delivered at PSI testing centers. Ensure you meet all eligibility requirements, including 3,000 hours of occupational health experience, before applying.

Occupational Health Nurse Jobs - COHN Exam study guide

FREE COHN PRACTICE TEST

COHN Certification Flashcards

Quick review for the Certified Occupational Health Nurse exam

🩺What is the primary goal of the COHN certification?

The COHN certification validates a nurse's qualification to practice occupational health nursing and ensures competence in protecting worker health and safety.

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🧠What does the COHN-S certification signify?

The COHN-S certification indicates a specialist level of practice, focusing more on management, consultation, and education roles within occupational health.

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📋How many hours of experience are required for COHN eligibility?

Candidates typically need 3,000 hours of occupational health nursing experience within the last five years to qualify for the COHN exam.

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⚠️What is a key focus of occupational health nursing?

A key focus is hazard identification and injury prevention, ensuring workplaces comply with OSHA regulations and safety standards.

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🔄How often must COHN certification be renewed?

The COHN certification must be renewed every 5 years, requiring continuing education credits and ongoing employment in the field.

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🏥What organization administers the COHN exam?

The American Board for Occupational Health Nurses (ABOHN) is the credentialing body responsible for administering the COHN and COHN-S exams.

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COHN EXAM QUESTIONS QUIZ

COHN Certification Study Guide

A solid study plan is essential for passing the COHN certification exam. Our tabbed guide below breaks down the key aspects of the COHN exam, from registration to results. Use this COHN certification study guide to navigate the process and understand exactly what is COHN certification and how it can advance your nursing career.

What is the COHN certification?	The Certified Occupational Health Nurse (COHN) credential validates a nurse's knowledge and experience in occupational health, safety, and case management.
Who is eligible for the COHN exam?	Eligibility requires a valid RN license, 3,000 hours of occupational health experience in the last 5 years, or a graduate degree in the field.
What is the difference between COHN and COHN-S?	COHN is for clinicians focusing on direct care, while COHN-S (Specialist) is for nurses in management, education, or consultative roles requiring a BSN or higher.
Why should I take the COHN exam?	Earning COHN certification demonstrates professional expertise, often leading to higher salaries, career advancement, and recognition in the field.

What is the COHN certification?

The Certified Occupational Health Nurse (COHN) credential validates a nurse's knowledge and experience in occupational health, safety, and case management.

Who is eligible for the COHN exam?

Eligibility requires a valid RN license, 3,000 hours of occupational health experience in the last 5 years, or a graduate degree in the field.

What is the difference between COHN and COHN-S?

COHN is for clinicians focusing on direct care, while COHN-S (Specialist) is for nurses in management, education, or consultative roles requiring a BSN or higher.

Why should I take the COHN exam?

Earning COHN certification demonstrates professional expertise, often leading to higher salaries, career advancement, and recognition in the field.

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COHN Score Calculator

Total Scored Questions

150

How many questions did you answer correctly?

0105150

105 out of 150 correct

70%

Required to Pass: ~70% (Estimated)

Your Score: 105 correct✓PASS

Expect to spend between $550 and $900 total for your initial COHN certification, depending on the study materials and review courses you choose.

Certified Occupational Health Nurse X - COHN Exam study guide

COHN Practice Test Questions

Prepare for the COHN Exam exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.

COHN ABOHN

COHN Exam Questions covering ABOHN. Master COHN Test concepts for certification prep.

COHN Environmental and Industrial Hygiene

Free COHN Practice Test featuring COHN Environmental and Industrial Hygiene. Improve your COHN Exam score with mock test prep.

COHN-S

COHN Mock Exam on COHN-S. COHN Study Guide questions to pass on your first try.

COHN Workers Compensation and Legal Aspects

COHN Test Prep for COHN Workers Compensation and Legal Aspects. Practice COHN Quiz questions and boost your score.

COHN Community Public Health Nursing

COHN Questions and Answers on Community Public Health Nursing. Free COHN practice for exam readiness.

COHN Disability and Return-to-Work

COHN Mock Test covering Disability and Return-to-Work. Online COHN Test practice with instant feedback.

COHN Emergency Preparedness and Response

Free COHN Quiz on Emergency Preparedness and Response. COHN Exam prep questions with detailed explanations.

COHN Ergonomics and Physical Hazards

COHN Practice Questions for Ergonomics and Physical Hazards. Build confidence for your COHN certification exam.

COHN Health and Safety Programs

COHN Test Online for Health and Safety Programs. Free practice with instant results and feedback.

COHN Health Promotion and Prevention

COHN Study Material on Health Promotion and Prevention. Prepare effectively with real exam-style questions.

COHN Occupational Case Management

Free COHN Test covering Occupational Case Management. Practice and track your COHN exam readiness.

COHN OSHA and Regulatory Compliance

COHN Exam Questions covering OSHA and Regulatory Compliance. Master COHN Test concepts for certification prep.

COHN Toxicology and Biohazards

Free COHN Practice Test featuring Toxicology and Biohazards. Improve your COHN Exam score with mock test prep.

COHN Workplace Hazard Identification

COHN Mock Exam on Workplace Hazard Identification. COHN Study Guide questions to pass on your first try.

COHN Workplace Injury and Illness

COHN Test Prep for Workplace Injury and Illness. Practice COHN Quiz questions and boost your score.

COHN CERTIFICATION PREP

COHN Career Opportunities

Explore the diverse roles available to a Certified Occupational Health Nurse

🏭

Industrial Nurse

Work in factories or manufacturing plants managing workplace injuries, conducting health screenings, and ensuring OSHA compliance.

🏥

Hospital

Employee HealthManage the health and safety of hospital staff, overseeing immunizations, exposure incidents, and wellness programs.

💼

Corporate Health Nurse

Provide health services in corporate settings, focusing on ergonomics, stress management, and executive health.

📂

Case Manager

Coordinate care for injured workers, managing workers' compensation claims and facilitating return-to-work plans.

🎓

Occupational

Health ConsultantAdvise various organizations on health and safety policies, regulatory compliance, and program development.

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COHN Test Day Checklist

✓Valid photo ID (Driver's License/Passport)
✓ABOHN Authorization to Test email
✓Arrive 30 minutes early
✓Review COHN practice test questions
✓Leave personal items in locker
✓Comfortable clothing (layers)
✓Directions to PSI center
✓Positive mindset!

📄Free COHN Practice Test PDF

Start Your COHN Exam Prep Today!

Don't wait until the last minute. Use our free COHN practice questions and study guides to pass your exam with confidence.

COHN Renewal Requirements

🔄

Renewal Cycle

5 Years

📚

CE Hours

50 CNE

💼

Practice Hours

3,000 hrs

Keep track of your continuing education (CNE) credits and employment hours. You can track these through the ABOHN online portal.

✅Pros

+Industry-recognized credential boosts your resume
+Higher earning potential (10-20% salary increase on average)
+Demonstrates commitment to professional development
+Opens doors to advanced career opportunities

❌Cons

−Exam preparation requires significant time investment (4-8 weeks)
−Certification fees can be $100-$400+
−May require continuing education to maintain
−Some employers may not require certification

COHN Questions and Answers

About the Author

Dr. Alexandra KimPhD Professional Studies, CPLP, CPTD

Certified Professional Development Expert & Niche Certification Advisor

University of Pennsylvania Graduate School of Education

Dr. Alexandra Kim holds a PhD in Professional Studies from the University of Pennsylvania and is a Certified Professional in Learning and Performance (CPLP) and Certified Professional in Talent Development (CPTD). With 17 years of corporate training and professional certification advisory experience, she helps professionals navigate specialized, emerging, and cross-industry certification programs.

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