The present study examined 115 service providers' adherence to components of cognitive-behavioral therapy (CBT) for youth anxiety before training, postworkshop training, and after 3 months of weekly consultation. Adherence was measured using a role play with a trained actor. We examined differences in individual adherence to CBT components across time and the relationship between number of consultation sessions attended and adherence ratings after consultation. Findings indicated that somatic arousal identification and relaxation were the most used treatment components before training. Adherence to all components of CBT increased after workshop training, except the usage of problem-solving. Adherence to problem-solving, positive reinforcement, the identification of anxious self-talk, and the creation of coping thoughts increased after consultation but usage of problem-solving remained low compared with other treatment components. Overall adherence remained less than optimal at the final measurement point. The number of consultation sessions attended predicted postconsultation adherence to identification of somatic arousal, identification of anxious self-talk, and positive reinforcement. Implications include tailoring future training based on baseline levels of adherence and spending more time during training and consultation on underutilized CBT components, such as problem-solving. Limitations of the present study, including how adherence was measured, are discussed. This study adds to the implementation science literature by providing more nuanced information on changes in adherence over the course of training and consultation of service providers.