COHN-S - Certified Occupational Health Nurse-Specialist Practice Test

To be eligible for the COHN-S exam, candidates must hold a current, unrestricted RN license in the United States or its territories. They must have a minimum of a Bachelor's degree in nursing (or a related field) and have completed at least 3,000 hours of work experience in occupational health within the last five years. Alternatively, candidates with a Master's degree or higher need 2,000 hours of experience. All experience must be verified by a supervisor or professional colleague. It is critical to review the latest eligibility guidelines on the official ABOHN website, as requirements may be updated.

The COHN-S is an advanced, specialist-level certification, while the COHN is a generalist certification. The key distinction lies in the scope of practice and exam content. The COHN-S exam places a stronger emphasis on strategic program management, leadership, consultation, and complex case management across multiple domains. It requires a higher level of education (Bachelor's minimum) and tests a more integrated, administrative, and business-oriented skill set. The COHN is an excellent foundation, but the COHN-S is designed for nurses who develop policy, lead teams, and manage comprehensive organizational health programs.

The COHN-S examination is a computer-based test consisting of approximately 160 multiple-choice questions, to be completed within a 3.5-hour testing period. The questions are based on the official exam blueprint and are designed to assess application and analysis, not just recall. The exam utilizes a variety of question formats, including standalone items and scenario-based item sets that present a case study followed by several related questions. The content is weighted across eight primary domains, with significant focus on Case Management, Occupational Health & Safety Programs, and Regulatory Compliance.

The COHN-S credential is valid for five years. Recertification can be achieved through one of two pathways: 1) Re-examination by successfully passing the current COHN-S exam, or 2) Earning a minimum of 75 continuing education contact hours (CEs) specific to occupational health nursing within the five-year cycle, along with maintaining an active RN license and documenting continued practice in the field. A percentage of the CEs must be from ABOHN-approved providers. Detailed logs and documentation are required for audit purposes. Staying current is essential due to the rapidly changing regulatory and clinical landscape.

For employers, a COHN-S-certified nurse represents a significant strategic asset. The certification assures leadership that the professional possesses validated, expert-level skills to manage risk, ensure regulatory compliance (OSHA, ADA, FMLA, etc.), reduce workers' compensation costs through effective case management, and design health promotion initiatives that improve population health and productivity. The COHN-S holder is equipped to translate health data into business intelligence, justify program ROI, and foster a culture of safety. This reduces organizational liability, enhances operational continuity, and directly contributes to the bottom line through healthier, more engaged employees.