In this issue of Clinics in Laboratory Medicine, guest editor Dr. Dina N. Greene brings her considerable expertise to the topic of Laboratory Testing and Health Disparities. Reflecting recent significant research on social determinants of health and impacts on health equity, this issue summarizes health disparities inside and outside of the lab for healthcare providers and laboratory professionals. Top experts in the field discuss laboratory professionals’ unique position in mitigating health disparities, raising awareness in this critical area and making recommendations for improvement. Contains 10 relevant, practice-oriented topics including literacy and language: improving accessibility of laboratory test results through patient portals; racism in drugs of abuse testing; inclusive clinical trials and research studies; designing laboratory utilization strategies to improve health equity; and more. Provides in-depth clinical reviews on laboratory testing and health disparities, 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.