Marsha Linehan Obituary: Creator of Dialectical Behavior Therapy (DBT) Dies at 83, Leaving a Lasting Legacy in Mental Health Treatment
Marsha Linehan, the influential American psychologist whose work transformed the treatment of borderline personality disorder and suicidal behavior, has died at the age of 83. Her passing on November 10, 2026, was shared in a message from Portland DBT Institute director Linda Dimeff and other members of the clinical community.
According to the message, Linehan died peacefully while surrounded by the love of her daughter, Geri. She had been admitted to UW Medical Center on October 31 with pneumonia and was later moved to comfort care. Her favourite Gregorian chant music was playing in the background during her final moments.
Linehan was best known for developing Dialectical Behavior Therapy (DBT), an evidence-based treatment initially created to help people experiencing suicidal behaviours. The approach later became widely used in treating borderline personality disorder and other conditions involving severe emotional difficulties.
As a professor emeritus at the University of Washington, she made lasting contributions to psychological research, clinical practice and professional training. She also founded Behavioral Tech and helped establish the DBT-Linehan Board of Certification to support the quality and consistency of DBT treatment.
Her influence extended far beyond academic research. In their message, colleagues described her as a mentor, a model of clinical courage and excellence, and a source of hope for patients and professionals alike.
The announcement also acknowledged that her death would deeply affect current and former clients whose lives had been changed by her work. Colleagues encouraged the DBT community to support one another while respecting the privacy of her daughter and family.
Linehan’s legacy is closely connected to the belief that people can move beyond profound suffering and build meaningful lives, one step and one skill at a time.
Further information about memorial arrangements and opportunities to honour her life is expected to be shared by her community.
