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The NBDHMT is a non-profit certifying organization designed to meet the clinical, technical and safety needs of the discipline of undersea and hyperbaric medicine. Opportunities exist for certification as a Diver Medic (DMT), as a Hyperbaric Technologist (CHT), as a Hyperbaric Nurse (CHRN) and as a Veterinary Hyperbaric Technologist (CHVT).

Whether you are preparing to take one of these certification examinations, or find it time to re-new, you will find a great deal of helpful information and guidance within the pages of our site.

The Board welcomes any questions or comments you may have. Use the "Contact Us" link to let us hear from you. Be sure to read the "Monthly Briefing" page, where regular updates on the Board’s activities will be featured.


Ensure that the practice of diving medicine and hyperbaric oxygen therapy is supported by appropriately qualified technologists and nurses, through respective board certification pathways.



Define and promote the safe application of diving medicine and hyperbaric oxygen therapy.

  • Establish standards for introductory training course curriculum
  • Develop, administer and evaluate technologist and nurse certification programs
  • Promote professional development