A psychiatric liaison program on a medical intensive care unit is described. The principle elements of the program include the psychiatrist becoming a member of the MICU "team" via: 1) attendance at morning medical rounds; 2) conducting case conferences; 3) availability to the nursing staff as a separate entity; 4) consulting with the unit directors; and 5 ) supervising a resident in psychiatry in his consultative work on the unit. The liaison psychiatrist's presence on the team facilitates an holistic approach to the patient and deals with intra-staff and patient-staff reactions in the critical care setting.Liaison psychiatry, in the past ten years, has assumed an increasingly important role in promoting an holistic approach to the patient. The liaison psychiatrist attempts to bridge the gap between mind and body, viewing the medically or surgically ill patient as needing attention for his physical problems as well as hs psychological reactions to those difficulties. Furthermore, he is sensitive to the interplay between staff and patient and the impact of that interaction on patient care.We have had an experience, over the past two years, in which a psychiatrist has been integrated into the treatment team of a medical intensive care unit in a large university hospital. This article will describe our experience and present a model for the psychiatrist's role on the MICU team as clinician, teacher, and consultant. Our model demonstrates a balance between liaison and consultative