The paper describes an evaluation of a risk assessment tool's effectiveness in distinguishing adolescent sexual offenders who had committed further sexual offences from those who had not. The sample consisted of 50 male adolescent sexual offenders referred to a forensic outpatient service within a healthcare setting. The adolescents within the sample were designated recidivists versus non-recidivists using two methods: clinican's judgement and Home Office records for reconvictions. The risk assessment achieved a moderate to high level of sensitivity and specificity in distinguishing the recidivists from non-recidivists using clinician's judgement of recidivism as outcome. However, the tool was unable to distinguish recidivists from non-recidivists. The risk assessment tool described has potential in the identification and modification of contextual and clinical risk factors, in informing professionals' decision-making and in developing and implementing a comprehensive risk management plan. (Contains 1 table.)