OBJECTIVE To investigate attitudes and experiences among general practitioners (GPs) taking part in an experiment with a list patient system in four municipalities in Norway. DESIGN A questionnaire distributed to all 160 GPs in the four municipalities after 3 years' trial of the system. SETTING Primary health care in Norway. MAIN OUTCOME MEASURES The opinions of physicians on a list patient system after 3 years of trial. RESULTS Most of the physicians held that the list patient system imposed more obligations than they were used to. However, the majority also held that the system enhanced preconditions for doing a good professional job; 68% wanted the system on a permanent basis, while 14% rejected it. CONCLUSION Positive aspects outweigh negative aspects in the attitude of GPs to a list patient system.