Vermont drug abuse expert witnesses assess substance use disorders, addiction medicine standards, and treatment outcomes across clinical and community settings. They often come from psychiatry, toxicology, emergency medicine, and licensed counseling, with experience in hub-and-spoke care and rural access challenges. Many have worked with UVM Medical Center or regional opioid treatment programs. They evaluate impairment, overdose causation, prescribing practices, and adequacy of detox, MAT, and monitoring.