Australia and New Zealand
The Australian and New Zealand Society for the History of Medicine is a national organisation which supports a number of regional organisations in individual states. More information can be found on their website.
French History of Medicine Society (Société française d'histoire de la médecine)
French History of Dentistry Society (Société française d'histoire de l'art dentaire)
Société d’Histoire de la Pharmacie is devoted to the history of pharmacy in France, The website is fully accessible in French and English. It has contains a narrative history of the French pharmaceutical industry, some useful links and its own journal..
The International Society for the History of Medicine was founded in Paris in 1921. Its official languages are English and French and its principal aim is to improve communication between historians and organisations.
The Worshipful Society of Apothecaries of London runs course and lecture series on the history of medicine. It also has an archive which does not appear to be searchable on line. But their website is quite comprehensive.
The American Association for the History of Medicine has a very useful website with links to many history of medicine publications.