The study has investigated the use of complementary and alternative medicine (CAM) at Danish rehabilitation institutions and drug centres. Questionnaires were sent to 147 centre leaders at 52 rehabilitation institutions and 95 drug centres. CAM is offered at 37.5% of the rehabilitation institutions and at 61.1% of the drug centres. Twenty-one different CAM modalities were used. Acupuncture and NADA-acupuncture had the highest prevalence. Motives for offering CAM were most often experienced effects within the institution and inspiration from other institutions.