The aim of the present study was to assess the use of consultation-liaison psychiatry in Norway, the resources used, the organisation and quality of the services, and whether there is a need to increase the services and improve the education. A questionnaire was mailed to all the major somatic and psychiatric departments in Norway. The questionnaires were completed and returned by 189 somatic departments (85%) and 74 psychiatric departments (55%). Each psychiatric department gives a median of two consultations each week (range 1-13). A minority of the consultations are with a specialist in psychiatry. About 60% of the psychiatric departments offer supervision of younger doctors. Psychiatric evaluation is seldom carried out when the somatic diagnosis is unclear. Most of the somatic departments are satisfied with the services. Both the somatic and psychiatric departments express a need for more extensive services and more education in medical psychology.