The International Physicians for the Prevention of Nuclear War (IPPNW) is an international peace organization of physicians committed to nuclear disarmament. Founded in 1980, the organization was awarded the Unesco Prize for Peace Education in 1984 and the Nobel Peace Prize in 1985 for its "important and competent information work", which raised global awareness of the consequences of nuclear war and acute radiation syndrome.

IPPNW is a non-partisan global federation of medical organizations dedicated to research, education, and advocacy relevant to the prevention of nuclear war. To this end, IPPNW seeks to prevent all wars, to promote non-violent conflict resolution, and to minimize the effects of war and preparations for war on health, development, and the environment.

While the abolition of nuclear weapons is IPPNW's highest priority, IPPNW recognizes that militarism and war rob both rich and poor societies of resources to protect and promote health. For this reason, IPPNW addresses the inter-related issues of landmines, small arms and light weapons, developing world debt, and chemical and biological weapons.

IPPNW open a branch office in Geneva in 2023.