International Physicians for the Prevention of Nuclear War is a non-partisan federation of national medical groups in 63 countries, representing tens of thousands of doctors, medical students, other health workers, and concerned citizens who share the common goal of creating a more peaceful and secure world freed from the threat of nuclear annihilation. The organization's headquarters is in Somerville, Massachusetts. IPPNW was awarded the Nobel Peace Prize in 1985.
IPPNW affiliates are national medical organizations with a common commitment to the abolition of nuclear weapons and the prevention of war. Affiliates range in size from a handful of dedicated physicians and medical students to tens of thousands of activists and their supporters. As independent organizations within a global federation, IPPNW affiliates engage in a wide variety of activities related to war, health, social justice, and the environment.