In this issue of Pediatric Clinics of North America, guest editors Drs. Roger W. Apple and Ethel G. Clemente bring their considerable expertise to the topic of Role of Psychologists in Pediatric Subspecialties. Top experts in the field highlight the interdisciplinary nature of primary care of children where psychology is a factor, placing emphasis the clinical topics, disease states, or medical specialties where mental health has a significant impact on the outcome and successful treatment of clinical issues in children. This issue offers a unique focus on collaboration between the psychologist and pediatrician to optimize outcomes. Contains 16 practice-oriented topics including helping physicians collaborate with psychologists;  psychologists' experiences in pediatric hematology-oncology; the role of psychologists in child abuse pediatrics; the critical role of psychologists in pediatric gastroenterology; the role of psychologists in pediatric sports medicine practice; and more.  Provides in-depth clinical reviews on the role of psychologists in pediatric subspecialties, offering actionable insights for clinical practice.  Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.