Objective The allocation of neuropsychology services in Victoria's public youth mental health system is very limited. The objective of this study was to evaluate the utility of a youth mental health neuropsychology service over a 16‐month period, and to evaluate referrer feedback about the service. Methods A 16‐month clinical data audit and referrer survey of the Eastern Health Child and Youth Mental Health Service neuropsychology service. Results A total of 45 clients were seen for assessment during the audit period with an age range of 7–25 years. Neuropsychological involvement identified DSM diagnoses in 42% of clients, as well as findings that were considered to be of neuropsychological importance in a further 51%. Case manager referrer surveys were returned at a rate of 58%, with 100% of responses indicating that the neuropsychological input had assisted with treatment planning, and that 79% of responders had altered their therapeutic approach after receiving the neuropsychological results. Conclusions Neuropsychology input in youth mental health services is useful from both a diagnostic and treatment planning perspective and often results in alterations in the therapeutic approach of case managers.