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Matthew J. Mosquera, MD

McLean Hospital Title
Harvard Medical School Title
  • Instructor in Psychiatry


Matthew J. Mosquera, MD, is medical director of the Alcohol, Drugs, and Addiction Inpatient Program at McLean Hospital. He is board-certified in general and addiction psychiatry. His clinical work focuses on the outpatient and inpatient treatment of individuals struggling with substance use disorder and other co-occurring psychiatric disorders.

Dr. Mosquera’s clinical and research interests include optimizing alcohol and drug withdrawal management, physician well-being, and addressing co-occurring psychiatric illness with substance use disorder for Spanish speaking patients. He is active in teaching fellows, residents, and medical students.


Education & Training

  • 2012 BSFS in Science, Technology, and International Affairs, Georgetown University
  • 2013 MS in Physiology, Georgetown University
  • 2017 MD, Northwestern University Feinberg School of Medicine
  • 2017-2021 Psychiatry Residency, Brigham and Women’s Hospital/Harvard Medical School
  • 2021-2022 Addiction Psychiatry Fellowship, Mass General Brigham/Harvard Medical School
Board Certifications:
  • 2020 Medical License, Board of Registration in Medicine, Commonwealth of Massachusetts
  • 2021 Psychiatry, American Board of Psychiatry and Neurology
  • 2022 Addiction Psychiatry, American Board of Psychiatry and Neurology
  • 2022 Medical License, State of New York


Phone: 617.855.3883
Office Address: Belmont campus - Proctor House, Room 305