Background: Opioid misuse is a growing crisis among patients with chronic pain. Cancer patients at risk of aberrant drug behaviors (ADB) are frequently underdiagnosed in routine cancer care. The aim of this study was to determine the frequency and factors predicting risk for Aberrant Opioid and Drug use among Patients receiving Outpatient Supportive Care Consultation at a Comprehensive Cancer Center Methods: In this retrospective study, 690 consecutive patients referred to a supportive care clinic were reviewed. Patients were eligible if they were ≥18 years, had a diagnosis of cancer, and were on opioids for pain for atleast a week. All patients were assessed with the Edmonton Symptom Assessment Scale (ESAS), SOAPP-14, and CAGE-AID. At risk patients with aberrant opioid behavior (+Risk) was defined as SOAPP-14 score ≥7. Descriptive statistics, spearman correlation coefficient, multivariate analysis were performed. Results: 690/752 consults were eligible. A total of 135(20%)were +risk. 69(11%) were CAGE-AID +.SOAPP-14 scores were positively associated with CAGE-AID p < 0.001; male gender p = 0.007; ESAS pain p = < 0.006; ESAS depression p < 0.001; ESAS anxiety, p < 0.001, and ESAS financial distress p = < 0.001. Multivariate analysis indicated that the odds ratio for +Risk was 2.47 in patients with CAGE-AID+ (p < 0.001), 1.95 for male gender (p = 0.005), 1.11 per point for ESAS anxiety (p = 0.019), and 1.1 per point. for ESAS financial distress (p = 0.02). Conclusions: 20% of cancer patients on opioids presenting to supportive care center are at risk of aberrant drug behavior. Male patients with anxiety, financial distress, and prior alcoholism/illicit drug use are significant predictors of +Risk. Further research to effectively manage these patients is needed.