Study of the telephone practice in four family practice settings reveals a complex interaction between patients, physicians, and receptionists. Patients present a limited number of complaints--80 percent of complaints represent 25 common chief complaints, and 95 percent represent 50 chief complaints. Little difference was observed between the symptoms reported by patients to the physicians as compared to those received by the receptionist staff. Physicians are more likely to use the telephone contact to treat the patient's complaint with home care advice or a prescription. Receptionists are more likely to use the telephone contact for scheduling an office visit.