Commonwealth Medical Association (CMA) The Commonwealth Medical Association was established in 1952. The Association, also known as the CMA, is a non-governmental organization and its main objective is to assist and strengthen the capacities of national medical associations (NMAs) of countries within the Commonwealth to improve the health, well-being and human rights of their countries and communities. (Technical advice and co-operation, networking, medical ethics, training, communications, Ministerial  advocacy.