The Particle Therapy Cooperative Group - North America (PTCOG-NA) is the North American chapter of the international Particle Therapy Cooperative Group (PTCOG). This non-profit professional society has been created in January 2013 to enhance collaboration between its members, create a platform for scientific exchange, and develop treatment guidelines, education, and training initiatives for particle therapy. The society will take steps towards establishing a particle therapy clinical trial collaborative group, as well as instituting representation in industrial technology, particle therapy innovations, involvement in health care politics (as it pertains to particle beam therapy), and improving relationships with other professional societies in radiation oncology.