The authors describe an effort to develop criteria for utilization review of treatment for suicide attempters. Explicit criteria proposed by a panel of experts as essential determinants for hospitalization of these patients were compared with actual clinical practice. It was found that according to the experts' criteria (which were operationalized into rating assessments), over half of the outpatient sample should have been hospitalized. After multiple regression analysis was carried out on the criteria, however, four predictors showed that only 20 percent of the outpatients should have been hospitalized. The authors discuss the issues these findings raise about the criteria of the experts, their utility for research, their validity, and their implications for utilization review.