CTH® Program

The ISTM Certificate of KnowledgeTM


The ISTM Certificate of KnowledgeTM Program was created to:

  • Establish an international standard for travel medicine practitioners
  • Encourage individual and global professional development in the area of travel medicine
  • Formally recognize individuals who pass the Certificate of KnowledgeTM Examination
  • Serve the public by promoting quality travel medicine services
  • Demonstrate the global validity of epidemiological data and of preventive strategies

As with most healthcare disciplines, the practice of travel medicine is a changing and evolving field. In recognition of the critical need for travel medicine practitioners to maintain and increase their skills and knowledge, the ISTM has developed a continuing professional development program for travel medicine practitioners. The program is structured around a 10-year cycle of professional education, study and involvement in the field of travel medicine.

Activities which comprise this program include, but are not limited to: passing an examination, educational programs and products, writing, editing and reviewing publications, teaching, research, clinical work and other professional development in which travel medicine practitioners participate.

The ISTM welcomes applications from all qualified professionals who provide travel medicine-related services on a full- or part-time basis. The exam is open to all licensed travel medicine professionals, including physicians, nurses, pharmacists and others. Both ISTM members and non-members are eligible to participate.

Upcoming CTH® Examinations

  • 4-8 May 2026

CTH® Renewal Process / Continuing Professional Development

To maintain their CTH® credential, candidates who received their certificate beginning in 2011 must complete required activities and apply for renewal every 10 years.

Body of Knowledge

Professionals in the travel medicine field need a comprehensive knowledge base that encompasses various areas. Key topics include global epidemiology of health risks for travelers, vaccinology, malaria prevention, and pre-travel counseling aimed at preserving the well-being of individuals on the move.

Learning @ ISTM

To expand the reach of its educational curriculum, ISTM has established the Learning @ ISTM portal to capture all digital learning in one place. Our educational offerings include topics that are relevant to travel medicine practitioners.