In 1997 all PRN members, a total of 531 psychiatrists, were sent a mail survey on psychiatric patients and treatments that included questions about their patient caseload in their last typical work month across all work settings. Specifically, they were asked about the total number of patients treated, the number who were HIV seropositive, and the number who had any risk factor for HIV infection based on their knowledge of the patient's behavior, including unprotected sex, injection drug use, and occupational exposure. A total of 417 psychiatrists, or 79 percent, responded to the survey, and more than 96 percent of them provided data on HIV prevalence and risk among their patients. The results presented are based on unweighted data.