Reuben Arasaratnam, M.D.

  • Internal Medicine - Infectious Diseases and Geographic Medicine
  • Infectious Disease
  • Infectious Complications Transplant Recipients


Reuben Arasaratnam, M.D., is an Associate Professor in the Department of Internal Medicine at UT Southwestern Medical Center, and a member of its Division of Infectious Diseases and Geographic Medicine. His clinical interests include infectious disease care of the immunocompromised host, viral infections, vaccination and non-tuberculous mycobacterial (NTM) infections.

Originally from Ascot, England, Dr. Arasaratnam holds a bachelor's degree in physiology from the University of Cambridge. He received his medical degree from the University of Oxford Medical School, where he graduated with honors, and obtained internal medicine residency training Oxford University Hospitals. He subsequently moved to the United States to pursue further internal medicine training at the University of North Carolina in Chapel Hill, and then completed advanced training through a fellowship program in infectious diseases at Baylor College of Medicine in Houston, where he focused on caring for patients who were immunocompromised. During his clinical training he obtained a master's degree in public health from the Harvard T.H. Chan School of Public Health in Boston, and pursued additional research in translational viral immunology, resulting in one of the first prospective multi-virus characterizations of T cell immunity in a pediatric solid organ transplant cohort, and another study identifying dominant T cell targets of Parainfluenza virus 3 (PIV-3).

Certified by the American Board of Internal Medicine in internal medicine and infectious diseases, Dr. Arasaratnam joined the UT Southwestern faculty in 2017.

In his role as Assistant to the Medical Services Chief for Education at the Dallas VA Medical Center, Dr. Arasaratnam supports the current educational activities of this training facility while also providing comprehensive inpatient and outpatient infectious disease care for veterans and attending physicians on the Internal Medicine Teaching Service. As a medical educator, Dr. Arasaratnam has a strong focus on teaching and assessing clinical reasoning, faculty development and fostering an inclusive clinical learning environment for the trainee.

Dr. Arasaratnam is an active member of several professional organizations, including the Royal College of Physicians, Society to Improve Diagnosis in Medicine, Texas Transplant Society, Infectious Diseases Society of America, and the American Society of Transplantation.

Education & Training
  • Medical School - , Medicine
  • Graduate School - Harvard University, International Health
Professional Associations & Affiliations
  • American College of Physicians (2011), Member
  • Infectious Disease Society of America (2013), Member
  • American Society of Transplantation (2013), Member
Honors & Awards
  • David Ontjes Award for Outstanding Performance During Residency 2012, University of North Carolina, Chapel Hill
  • First Place 2016, Department of Medicine Housestaff Research Symposium, Baylor College of Medicine, Houston
Books & Publications
  • Viral Immunology
  • Utility of Clinical Biomarkers to Predict Infections Following Solid Organ Transplant
  • Application of Cellular Therapies to Treat Viral Infections in Immunocompromised Recipients

Clinical Focus

  • Infectious Disease
  • Infectious Complications Transplant Recipients

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2021 Leaders in Clinical Excellence video: Dr. Reuben Arasaratnam