Ranier Reyes, M.D. joined UT Southwestern in 2020 as an Assistant Professor in the Division of Neurocritical Care. He primarily cares for patients in the neuroscience intensive care unit (ICU) at both Clements University Hospital and Parkland Memorial Hospital

Dr. Reyes was born in Houston, TX, and earned a B.S. in Neuroscience from Baylor University in Waco, TX. He obtained his medical degree from The University of Texas at Houston Medical School (now McGovern Medical School) and completed residency training in Neurology at Baylor College of Medicine, where he also served as a Chief Resident. He then completed a neurocritical care fellowship at UT Southwestern Medical Center.

He specializes in the care of critically-ill patients with neurological and neurosurgical disorders and has particular interests in cerebral edema, death by neurological criteria (brain death), and medical/simulation education and wellness. He is a diplomate of the American Board of Psychiatry & Neurology and is also ACGME board certified in neurocritical care. 

Dr. Reyes currently serves as the program director of the Neurocritical Care Fellowship and strives to mentor high-quality, compassionate physicians into expert, well-rounded clinicians and academicians who will make a positive impact in their future practice. 




Medical School
UT Health Science Center McGovern Medical School (2014)
Baylor College of Medicine (2018), Neurology
UT Southwestern Medical Center (2020), Neurocritical Care

Research Interest

  • Cerebral Edema & Brain Injury
  • Death by Neurological Criteria (Brain Death)
  • Intracerebral hemorrhage
  • Mentorship and Education, Simulation Education


Featured Publications LegendFeatured Publications

Arguments Supporting the Whole-Brain Criterion
Michael A. Rubin, Ranier G. Reyes 2023
Quantitative Pupillometry Values are Remarkably Similar Before and After Neuroimaging
DaiWai M. Olson RN, PhD, Sonja E. Stutzman PhD, Emerson B. Nairon BSA, Ranier Reyes MD 2023
Complications of small-bore feeding tubes: is newer technology necessarily better?
Campos Y, Kerin C, Reyes R, Trauma Surg Acute Care Open 2020 5 1 e000572
Bupropion overdose as a clinically significant confounder of the neurological examination
Reyes R, Figueroa S, J Neurocrit Care 2020 13 2
An update on neurocritical care for intracerebral hemorrhage.
Reyes R, Viswanathan M, Aiyagari V, Expert Rev Neurother 2019 06 19 6 557-578

Honors & Awards

  • Rolak Award - Academic and Education Excellence in Residency
    Department of Neurology, Baylor College of Medicine (2018)
  • Chief Resident
    Department of Neurology, Baylor College of Medicine (2017-2018)

Professional Associations/Affiliations

  • American Academy of Neurology (2014-2024)
  • European Society of Intensive Care Medicine (2019-2024)
  • Neurocritical Care Society (2017-2024)