Amanda von Horn, MD
Amanda von Horn, MD joined the Vanderbilt faculty in 2025 and serves as Division Director of Addiction Psychiatry, Associate Program Director for the Vanderbilt Addiction Psychiatry Fellowship, and Assistant Professor of Psychiatry and Behavioral Sciences. She also serves as the co-Principal Investigator for the state-funded Middle Tennessee Opioid Addiction Treatment Hub at Vanderbilt.
Prior to joining the Vanderbilt faculty, Dr. von Horn served as the Division Director of Addiction Psychiatry for Tufts Medical Center in Boston, Mass. from 2021 to 2025. There, her clinical work included serving as the attending physician for the inpatient Addiction consult service. She also created and staffed the outpatient Addiction Bridge clinic to provide a continuum of care for underserved patients with substance use disorders, as well as a consultation clinic to provide collaborative SUD-focused evaluations for colleagues in Internal Medicine, Infectious Disease, Pain Medicine and Transplant Hepatology.
Dr. von Horn is a passionate clinician-educator. While at Tufts, she led, revised and expanded the Addiction and Substance Use Disorders curriculum for the general psychiatry residency program, and lectured regularly on substance-related and addictive disorders across numerous medical education contexts, including serving as a Course Director for the Tufts University School of Medicine in 2025. She has received numerous teaching awards for her work with residents, medical students, and fellows.
Dr. von Horn’s scholarly interests include Addiction consultation and liaison models of care, medical education, and physician health programs. She has served on the Board of Directors for the Massachusetts Physician Health Program from 2021-2025.
Dr. von Horn received her MD degree from the University of Wisconsin-Madison School of Medicine and Public Health. She went on to complete her training in General Psychiatry and Addiction Psychiatry at Boston University School of Medicine. She is board-certified in General Psychiatry, Addiction Psychiatry and Addiction Medicine.
Kelly Vance, LPC-MHSP
Research interests include clinical outcomes for individuals with psychosis receiving coordinated specialty care. More specifically, how this form of care impacts patients with differing racial backgrounds.
Kelly's clinical work focuses on cognitive interventions for individuals experiencing psychosis or related affective disorders.
Kelly is a Licensed Professional Mental Health Counselor who joined Vanderbilt Psychiatry in 2019 as the Supported Employment & Education Specialist. She has since completed her graduate degree in 2021 and has worked as a Mental Health Therapist and Team Lead for patients experiencing early psychosis. Kelly's background includes occupational case management for underserved young adults and refugee populations.
Anthony (John) Clausi, LPC/MHSP
Working with families that are struggling with trauma, mental health issues, or interpersonal issues.
After a first career as a professional musician, John completed a Masters Degree in professional counseling and joined the team at VUMC as a psychotherapist in 2006. John is a licensed LPC/MHSP with certifications in trauma counseling, grief counseling, eating disorders, depression, and anxiety disorders.
Katherine Musacchio Schafer, PhD, MS, MEd
Dr. Katherine Musacchio Schafer is a clinical psychologist and assistant professor with the Department of Biomedical Informatics and Department of Behavioral Sciences and Psychiatry at Vanderbilt University Medical Center. Clinically her work focuses on the treatment of PTSD through Prolonged Exposure Therapy, Cognitive Processing Therapy, and Written Exposure Therapy. Her research work centers on patient and provider centered care in the improvement of processes connecting high risk patients to mental health referrals. She completed a Master’s of Science and Doctorate of Philosophy in Clinical Psychology at Florida State University (Tallahassee, Florida). She subsequently completed her pre-doctoral clinical internship at the Southeast Louisiana Health Care (New Orleans, Louisiana VA) and post-doctoral fellowship in healthcare quality improvement with the VA Quality Scholars at the Tennessee Valley Healthcare Systems (Nashville, Tennessee VA). Dr. Schafer is broadly interested in using informatics tools to improve access to and delivery of mental health treatments.