Theresa “Tessa” Matson, PhD, MPH is a Collaborative Scientist at Kaiser Permanente Washington Health Research Institute. Her research seeks to integrate addiction health services within primary care in patient-centered ways that reduce disparities and help patients feel valued and more informed about treatment options. Dr. Matson is a co-investigator on National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse-funded trials, including the C-DIAS Research Project 3, “Addressing Barriers to Care for Substance Use Disorder.” She is enthusiastic about applying her fellowship training to engage health system leaders, clinical staff, and patients in the design and implementation of these efforts. As part of her fellowship, Dr. Matson is also a member of the C-DIAS Design & Modeling research core. Currently, she is collaborating with her C-DIAS mentor, Dr. Sandro Galea, to better understand methodological approaches, challenges, and opportunities for evaluating inequities in healthcare.