The professional relationship between social workers and physicians historically has been somewhat strained. Social workers have been quick to blame the medical model for problems in health care and consequently have overlooked useful lessons from this model that could improve social work practice. To work effectively with physicians, social workers must be aware of physicians' professional values and be able to identify conflicts with social work values. Conflicting values in social work and medicine are identified in five areas: (1) saving life versus quality of life, (2) patient autonomy in setting treatment goals, (3) attitudes toward objective versus subjective data, (4) responses to patients with emotional problems, and (5) differing perspectives on interdisciplinary team roles. Case illustrations based on the author's experiences as director of behavioral science training for resident family practice physicians are included. Although different value orientations may produce conflict, the differences also can catalyze successful collaboration between the two professions, which ultimately will benefit patients who receive care.