Cognitive behavioral therapy for youth with autism spectrum disorder and anxiety is effective, but disparities exist in accessing these programs. Training school providers to deliver cognitive behavioral therapy may help to address these disparities. However, little is known about how cognitive behavioral therapy programs are implemented by interdisciplinary school providers and the broader impact of these programs. This study aimed to address this gap and was part of a larger trial that examined the effectiveness of Facing Your Fears–School-Based across 25 public schools. Study aims were to understand the impact of Facing Your Fears–School-Based and factors that impacted implementation. Thirty providers participated in exit interviews guided by the Reach, Effectiveness, Adoption, Implementation, and Maintenance framework. Primary themes included (1) the fit of Facing Your Fears–School-Based for diverse students; (2) the effects of Facing Your Fears–School-Based on students’ school participation; and (3) planned Facing Your Fears–School-Based maintenance. Participants also highlighted the program’s accessibility for non-mental health providers and reported adapting Facing Your Fears–School-Based in response to student needs. Results suggest that Facing Your Fears–School-Based may have a broader impact on students and highlight the importance of task sharing to overcome mental health staff shortages within public schools. Programs that can be implemented flexibly are also critical given variability in school structures and student needs. Lay abstract Cognitive behavioral therapy helps to treat anxiety symptoms in autistic youth, but it is difficult for families to access cognitive behavioral therapy in the community. Training school providers to deliver cognitive behavioral therapy may help autistic youth and their families to access these programs. Unfortunately, we do not know how cognitive behavioral therapy programs can be delivered by school providers and how these programs help the autistic students who access them. This study addressed this gap and was part of a larger study that looked at the effectiveness of Facing Your Fears–School-Based in 25 public schools. The study goals were to understand whether Facing Your Fears–School-Based helped students and the factors that made it easy or difficult to deliver Facing Your Fears–School-Based in schools. Thirty providers participated in interviews guided by the Reach, Effectiveness, Adoption, Implementation, and Maintenance framework. Participants shared information that fell into several major categories that included (1) delivering Facing Your Fears–School-Based to many different students; (2) the positive impact of Facing Your Fears–School-Based on students’ school participation; and (3) plans to continue using Facing Your Fears–School-Based. School providers also shared that Facing Your Fears–School-Based was easy to use for non-mental health providers and reported adapting Facing Your Fears–School-Based to meet student needs. The results of this study suggest that Facing Your Fears–School-Based may help autistic students and highlight the importance of using mental health programs in schools that are flexible, able to be adapted, and that are able to be used by many different types of school providers.