Kustannus Oy Duodecim

Kustannus Oy Duodecim is a Finnish medical publishing house and professional association that produces clinical decision-support tools, medical journals, and health information for both healthcare professionals and the general public. They operate a broad digital platform ecosystem including Terveysportti, Käypä hoito (evidence-based guidelines), Oppiportti (medical education), and Terveyskirjasto (consumer health library). The organization also functions as a membership society for Finnish physicians, offering training, events, and professional resources.