Marshall Thomas, MD, President and CEO
Marshall Thomas, M.D., president and chief executive officer, is responsible for advancing the Colorado Access corporate mission and provides executive oversight for all programs.
Dr. Thomas has been with Colorado Access for two decades, with increasing levels of executive responsibility culminating in his appointment as president and chief executive officer in 2006. Throughout his career, Dr. Thomas has worked to develop systems of care that are inclusive, responsive and create synergies between patients and providers. He is a recognized national expert on improving patient health outcomes by integrating medical and behavioral health care. Under his leadership, Colorado Access has created strong business practices, expanded its client base and reoriented internal practices to support clients and providers and strengthen the safety net. In addition to his position at Colorado Access, Dr. Thomas is a professor of psychiatry and family medicine, holds the Marisco Chair for Excellence, and is the executive director of the Helen & Arthur E. Johnson Depression Center at the University of Colorado Anschutz Medical Campus.
He is a practicing psychiatrist and has been involved in the system of care development in Colorado since 1980. Dr. Thomas earned his medical degree from Baylor College of Medicine and completed his psychiatry residency at the University of Colorado Health Sciences Center.
Alexis Giese, MD, Senior Vice President of Healthcare Systems and Chief Medical Officer
Alexis Giese, M.D., senior vice president of healthcare systems and chief medical officer, provides executive oversight of enterprise-wide health strategy, clinical operations, long-term services and supports, population health, care coordination and quality management. She has served at Colorado Access since 2008.
Dr. Giese has nearly 30 years of experience in innovative service delivery leadership and as a practicing psychiatrist. Her experience includes 10 years as psychiatry consultant to the Colorado Department of Human Services’ Office of Behavioral Health, community psychiatry program consultation, and health services research. Dr. Giese earned her Bachelor of Science degree from West Virginia University and her Doctor of Medicine degree from The University of Texas Health Science Center at Houston. She completed the psychiatry residency program at Georgetown University.
Dr. Giese is also a clinical professor in the departments of psychiatry and family medicine at the University of Colorado School of Medicine and serves as the director of community programs at the Helen & Arthur E. Johnson Depression Center.
Scott Humphreys, MD, Senior Medical Director
Scott Humphreys, MD, is the senior medical director providing clinical oversight to the behavioral health programs in Denver and Northeast Colorado and oversees the utilization department at Colorado Access.
Dr. Humphreys received his medical degree from the University of Oklahoma. He completed his residency in general psychiatry at Johns Hopkins Hospital where he was the chief resident. He came to Denver for his fellowship in forensic psychiatry through the University of Colorado Denver. He is also certified in addiction medicine.
For nearly 10 years, Dr. Humphreys was an inpatient and consult-liaison psychiatrist for the HealthONE hospital system. In addition to his work at Colorado Access, Dr. Humphreys is an associate medical director at the Colorado Physician Health Program. He continues to be affiliated with the forensic psychiatry training program and maintains a small private practice.
Dr. Kimberly Nordstrom received her medical and legal degrees at Southern Illinois University, School of Medicine and School of Law, respectively. She trained in psychiatry at the University of Colorado Denver, School of Medicine where she also served as chief resident. Dr. Nordstrom has worked in the fields of general adult, emergency, and forensic psychiatry.
Dr. Nordstrom joined Colorado Access in 2018 as medical director for behavioral health. Before Colorado Access, she was medical director of the office of behavioral health and the division director for the Colorado Mental Health Institutes for the State of Colorado. For years, she worked as the medical director for psychiatric emergency services at Denver Health Medical Center which was an administrative, clinical and teaching position. She is an associate clinical professor of psychiatry with the University of Colorado, Denver and board certified in general adult psychiatry. Dr. Nordstrom has researched and written extensively in the field of behavioral emergencies. Her work can be found in both psychiatry and emergency medicine journals and texts. Dr. Nordstrom has spoken on various behavioral emergency topics nationally and internationally. She has served as the chair of the Coalition on Psychiatric Emergencies and President of the American Association for Emergency Psychiatry. She is a distinguished fellow of the American Psychiatric Association.
Dr. William Wright currently serves as the program medical director for Colorado Access. Before joining Colorado Access, Dr. Wright served as executive medical director of the Colorado Permanente Medical Group. Dr. Wright currently serves on the board of CIVHC, the Colorado Physician Health Program, the Colorado Institute of Family Medicine and the PAC for the Colorado Medical Society. He was a trustee for the Colorado Trust. Current memberships include the American Academy of Family Practice, the Colorado Academy of Family Practice and the Colorado Medical Society.
After medical school, Dr. Wright completed a family medicine residency at St. Joseph’s Hospital in Denver. Dr. Wright also earned a master’s degree in public health from the University of Colorado Health Sciences Center, where his thesis project focused on factors that affect health care utilization. Dr. Wright has previously worked in assessing and developing community network relationships, spending six years as the chief of primary care for Kaiser Permanente, having responsibility for meeting the goals of the quadruple aim.
Jay H. Shore, MD, MPH, is the chief medical officer for AccessCare Services and provides oversight and strategic leadership for that company, focusing on telemental health and other technologies for Colorado Access members. He has been with AccessCare and Colorado Access since 2014.
Throughout his career, Dr. Shore has focused the use of technology in mental health, which include ongoing development, implementation, and assessment of programs in native, rural, and military settings aimed at improving both quality and access to care. He has consulted for tribal, state and federal agencies and served on planning and/or grant review committees for several federal agencies including the Department of Veterans Affairs, the Department of Defense, the Indian Health Service and the National Institutes of Health. In addition to his work with Colorado Access, he is a professor in the department of psychiatry and family medicine and Centers for American Indian and Alaska Native Health, director of telemedicine at the Helen and Arthur E. Johnson Depression Center and director of telemedicine programming in the department of psychiatry at the University of Colorado Anschutz Medical Campus. Dr. Shore is a fellow in the American Telemedicine Association, served on its board of directors, and is an active member in its TeleMental Health Special Interest Group for which he served as chair. He is a distinguished fellow of the American Psychiatric Association and serves as the current chair of the APA Telepschiatry Committee.
Dr. Shore earned is medical and public health degrees from Tulane University School of Medicine and Public Health and completed residency at the University of Colorado Anschutz Medical Campus.
Leah Honigman Warner, MD, MPH, is a program medical director at Colorado Access. Dr. Warner received her medical degree from the University of Colorado School of Medicine in Aurora, Colorado. She trained at the Harvard Affiliated Emergency Medicine Residency at Beth Israel Deaconess Medical Center in Boston, MA. Following clinical training, she obtained a Master of Public Health with a focus in clinical effectiveness and health policy at Harvard School of Public Health. Dr. Warner has worked at a number of academic and community Emergency Departments in Massachusetts, Washington DC and outside of New York City. Prior to moving to Colorado, she was an Assistant Professor at the Hofstra Northwell School of Medicine in the Department of Emergency Medicine and the Medical Director for Emergency Medicine Integration at Norwell Health Solutions. Dr. Warner is board-certified in Emergency Medicine and works clinically at the San Luis Valley Regional Medical Center in Alamosa Colorado.
Through her work, Dr. Warner is committed to advancing innovative strategies to improve the delivery of health care. As the health care system shifts towards more value-based care, she is dedicated to redefining the role that population health strategies can play in containing costs while providing high quality health care. Dr. Warner has previously published on health care quality, operations and cost effectiveness.