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Addiction Faculty

​Carla Marienfeld, MD


Carla Marienfeld, MD, is a board-certified addiction psychiatrist who specializes in treating individuals with substance use disorders and co-occurring mental health conditions, such as anxiety and depression. She supports recovery in a harm-reduction approach that uses therapy, motivational interviewing, and medication-assisted treatment. 

An associate professor in the Department of Psychiatry, her research looks at health outcomes for individuals with substance use disorders and involves monitoring implementation of evidence based practices in treatment of substance use disorders. She has been highly involved in educating colleagues and trainees about addiction psychiatry and effective interventions, including buprenorphine treatment and motivational interviewing.

She is a member of many professional organizations, including the American Society of Addiction Medicine, the American Association of Addiction Psychiatry, and the American Psychiatric Association.

​Kara Bagot, MD

Clinical Associate Professor of Psychiatry

Faculty Research Interest/Specialization: child and adolescent psychiatry, adolescent substance use disorders, dual diagnosis

Stephen Groban, MD

Clinical Professor of Psychiatry
​​Dr. Groban has been the medical director of SARRTP, a residential alcohol and drug treatment program at the VA for 17 years. This is a 28 day program with a strong emphasis on training.The program includes UCSD and Navy psychiatric residents, medical students, and psychology fellows. It is a truly multidisciplinary treatment program.

Binh Ly, MD

Clinical Professor of Emergency Medicine
​Binh Ly, MD is the Emergency Medicine Vice-Chair of Education and Medical Toxicology Fellowship Director at UC San Diego. He completed his residency training in Emergency Medicine at UCSF-Fresno and fellowship training in Medical Toxicology at UC San Diego and has been a faculty member in the Department of Emergency Medicine at UC San Diego since 1999. In addition to being a reviewer for major publications in the fields of emergency medicine, toxicology, and pharmacology, Dr. Ly is the Editor for the Pharmacology Section of the Journal of Emergency Medicine (JEM) and is a member of the JEM's editorial board. His scholarly work includes authorship of numerous chapters in major textbooks in the specialties of emergency medicine and toxicology. His areas of interest include drugs of abuse, poisonous mushrooms, cardiovascular toxicology, ethanol withdrawal, and marine toxins.


Scott Matthews, MD

Clinical Professor of Psychiatry
​​Co-Director of the Interprofessional Advanced Fellowship in Addiction Treatment. Dr. Matthews is also a Staff Psychiatrist at VA San Diego Healthcare System where he is Chief of the Consultation Liaison Division of the VA Psychiatry Service. He also provides care for veterans in one of the VA’s outpatient mood clinics. Dr. Matthews is actively involved in teaching residents and medical students.

Nick Mellos, MD

VA Site Training Director
​Dr. Mellos is the Acting Chief of Psychiatry at the VA and the VA Site Training Director. He completed his Addiction Psychiatry Fellowship at Yale University and is double Board Certified in General Psychiatry and Addiction Psychiatry.

Alicia Minns, MD

Associate Clinical Professor

​Dr. Alicia Minns grew up outside of Detroit, MI. She attended college at the University of Michigan and completed medical school at Tufts University in Boston. She then came to UCSD where she did her Emergency Medicine residency followed by a two-year fellowship in Medical Toxicology. Alicia is currently an Assistant Professor and serves as faculty in both Emergency Medicine and Medical Toxicology. She participates in research in both areas, and is the fellowship director for Medical Toxicology.

Maria Tiamson-Kassab, MD

Clinical Professor of PSychiatry

Maria Tiamson-Kassab, MD, is a board-certified psychiatrist and the director of Moores Cancer Center’s Patient & Family Support Services, which treats people who may be experiencing depression, anxiety, insomnia or other psychiatric symptoms that are either a result of the cancer experience or are interfering with cancer treatment. She can provide psychiatric assessment, treatment and medication management. 

She a distinguished fellow of the American Psychiatric Association and a fellow of the Academy of Psychosomatic Medicine. Dr. Tiamson-Kassab has co-authored two editions of Practical Guide to Consultation-Liaison Psychiatry and Psychosomatic Medicine, and written book chapters and articles on various topics in psychosomatic medicine.

Douglas Ziedonas, MD, MPH

Professor and Associate Vice Chancellor, Health Sciences

​Associate Vice Chancellor for Health Sciences University of California San Diego

Patricia Judd, PhD

Patricia A. Judd, PhD, is a licensed clinical psychologist who specializes in evaluating and assessing mental health conditions. She focuses on individual and couples therapy for those struggling with substance use and other mental health disorders. She also works with individuals and couples with personality disorders. 

She can help connect patients to additional services, such as residential treatment (live-in mental health care), self-help groups and sober living that can further recovery and treatment.

Dr. Judd earned her doctorate in clinical psychology from the California School of Professional Psychology, San Diego. She is a member of several professional societies, including the North American Society for the Study of Personality Disorders, International Society for the Study of Personality Disorders, the American Psychological Association, and the California Psychological Association.

Brian Couey, PsyD, LAADC, CATC-IV, CAMF

​​ Brian Couey, PsyD, LAADC, CATC-IV, CAMF, has held several leadership roles in the addiction treatment field, including program manager at Valley Women's Center from 2009 to 2015, clinical coordinator at the Inter-Agency Drug Abuse Recovery Programs and manager at Center for Living and Learning, Inc. He earned a Doctor of Psychology in Clinical Psychology from the California School of Professional Psychology at Alliant University. A Licensed Advanced Alcohol and Drug Counselor, a Certified Treatment Counselor Level IV, and a Certified Anger Management Facilitator, Brian holds a Domestic Violence Counselor Certification and is certified in Seeking Safety and Nonviolent Crisis Intervention.