The 4th International Health Congress of Islamic Countries is hosted by Health Tourism Development Center of Islamic countries, ministries, national and international health organizations in Tehran, Iran. With the aim of playing an effective role in developing economic relations and facilitating the networks between stakeholders in the health industry through Islamic countries, the event started its official operation in 2015. For the fourth round of this Congress, seniors and experts from the governmental and private sectors in Islamic countries are invited to share their latest achievements and products as well as discuss on their issues, needs and ideas related to potentials of improving economic and technological cooperation. This event is not only for the players in Islamic countries, but it is also for all companies and organizations attempting to work in this huge market. Also having special attention to the identification and supporting active startups in the field of health tourism is another features of this international event.