In Memoriam: Professor Donald M. Hilty (1964-2026)

The World Psychiatric Association (WPA) and the WPA Digital Mental Health Section mourns the passing of Professor Donald M. Hilty (born 21st October 1964 – died 4 July 2026, United States), an outstanding psychiatrist, internationally recognised pioneer in telepsychiatry, and one of the world's leading experts in collaborative care and digital mental health.

Don spent the majority of his professional career on faculty at the University of California, Davis where he became known nationally as a pioneer in telepsychiatry. His other later leadership positions included Chief Medical Officer of United Health Services and Heritage Oaks Hospital and Associate Chief of Mental Health, Northern California VA Health Care System. His academic interests concerned all areas of telemedicine, mobile health, artificial intelligence and other digital health-related academic activities. In these areas, he made an outstanding contribution of global importance. He also played a defining role in developing the Journal of Technology in Behavioral Science, transforming it from a small start-up into an influential international and interprofessional journal serving clinicians, researchers, educators, and healthcare leaders worldwide.

Throughout his distinguished career, Don dedicated himself to improving access to mental health care through innovation, education, research, and international collaboration. He authored hundreds of scientific publications, mentored generations of clinicians, and was admired for his scientific excellence, kindness, generosity, and unwavering commitment to patients and colleagues.

Don was a founding and highly valued member of the WPA Digital Mental Health Section and was expected to take on a leading role in the Section following the upcoming elections. He had already contributed profoundly to its scientific, educational, and international activities since its inception.

We collaborated closely on numerous international initiatives, including co-editing two books, developing the WPA Telepsychiatry Global Guidelines, and organising many symposia and educational activities. Most recently, under Don’s leadership, we collaborated on the development of the WPA AI & mHealth Guidelines, bringing together experts from several WPA Scientific Sections to formulate comprehensive recommendations for the responsible use of artificial intelligence, mobile health, and digital technologies in psychiatry.

Beyond his remarkable professional achievements, Don will be remembered as an exceptional mentor, trusted colleague, and dear friend. His wisdom, humility, and generosity touched everyone who had the privilege of working with him.

The global psychiatric community has lost an extraordinary leader whose legacy will continue to inspire future generations.

On behalf of the WPA Digital Mental Health Section, we extend our deepest condolences to his family, friends, and colleagues.