Using an innovative mystery shopper methodology, three women (White, Latina, and Black voice actresses) called community mental health centers (CMHCs) and federally qualified health centers (FQHCs) (N=229) in Cook County, Illinois, posing as mothers requesting to schedule a mental health appointment for their adolescent child who had witnessed a traumatic event. Fewer than one in five contacts with mental health centers resulted in a mental health appointment, regardless of the caller’s insurance type. We identified significant capacity and administrative barriers associated with reduced access to urgently needed youth mental health services. Our results also raise the concern that racial-ethnic discrimination may occur at the time of scheduling. Of note, it is concerning that fewer than half of health centers reported offering trauma-informed therapy and that schedulers could name a specific type of trauma treatment that their center offered in only 15% of completed calls. Our results add to research calling for greater financial investments in mental health resources, particularly in safety-net systems of care.