The International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) is a federation composed of national associations of bariatric surgeons. Currently, 72 nations are officially members of IFSO. There are also individual members from countries that thus far have not formed a national association.
IFSO is divided into 5 regional chapters:
- European Chapter (EC)
- North America Chapter (NAC)
- Latin America Chapter (LAC)
- Asia and Pacific Chapter (APC)
- Middle East North Africa Chapter (MENAC)