Research has pointed to the importance of interprofessional collaboration (IPC) between school psychologists and medical providers in the provision of quality mental health care for youth with chronic health conditions. However, little is known about current IPC practices among school psychologists. This study examined school psychology trainees' and professionals' perceptions of training, preparedness, and current practices related to IPC with medical providers. Survey results indicated that participants (N = 317) endorse relatively low levels of training and preparedness and limited practice of IPC with medical providers. Additionally, results indicated that perceptions of training and preparedness were associated with current practices in IPC with medical providers. Findings demonstrated the impact of training and preparedness on subsequent engagement in IPC and have implications for the future training of school psychologists as they seek to address the needs of youth with chronic health conditions. K E Y W O R D S interprofessional collaboration, preparedness, school psychology, training