Duodecim Medical Publications Ltd is the largest Nordic medical publisher. Its products include up-to-date databases providing the latest knowledge for health care professionals and for the general public. The Decision support system combines medical knowledge and patient data for improved care. Duodecim continuously upgrades and publishes medical textbooks, handbooks and practical guidebooks.

Duodecim Medical Publications is the publishing house of the Finnish Medical Society and the tradition of medical publishing dates back to founding of the society in 1881. Duodecim is a scientific society with almost 90% of Finnish doctors and medical students, altogether over 20 000, as members. In 131 years the Society has grown from the initial group of 12 (duodecim = 12 in latin) medical students, struggling to improve the standing of the Finnish language in medicine, to a major organization that plays an important role in national health care.