IOMP was formed in January 1963 initially with 4 affiliated national member organizations (Canada, Sweden, UK, USA).

IOMP is affiliated to IUPESM, IUPAP and ICSU and is officially connected to IFMBE.

IOMP collaborates with professional bodies such as IRPA and ICRP and international organizations such as WHO and IAEA in promoting the development of medical physics and safe use of radiation and radiological equipment technology.

To raise awareness about the role medical physicists play for the benefit of patients, IOMP organizes the annual International Day of Medical Physics (IDMP) on November 7 - the birthday of Marie Sklodowska-Curie.

[4] Countries are represented by the respective National Organizations for Medical Physics.