Joined UT Southwestern: 1998

Clinical Interests: Acute Stroke Care; Cerebral Venous Sinus Thrombosis; Treatment of patients with intracranial and extracranial atherosclerotic isease, cardiac Sources of stroke, small vessel disease; moyamoya; CADASIL and cerebrovascular Vessel Dissections;  The assessment of patients with Neurosonology techniques including: Transcranial and Carotid Doppler

Research: Acute Stroke Care; Cerebral Venous Sinus Thrombosis; Intracranial and Extracranial Vessel Disease; Cardiac Causes of Stroke, Small Vessel Disease, and applications of Transcranial Doppler in care of patients with radiation vasculopathy.

Education: In the past had been Fellowship Director for the Vascular Neurology Fellowship;  Dr Johnson participates regularly in the teaching of medical students, residents and advance practice providers.

Specialty Role/Leadership: Dr Johnson has had multiple administrative positions throhout his career including: Section and Co-Section chief; Hospitals Neurology Chief; Cerebrovascular Diseases and Stroke Comprehensive Stroke Center medical director and co-medical director; Cerebrovascular Diseases and Stroke Clinic Medical Director

Affiliations and Awards: Dr Johnson has twice received the coveted Trephined Cranium Award for best teaching from the UTSW Department of Neurology.



Medical School
Universidad Central del Caribe (1992)
George Washington University Hospital (1993), Internal Medicine
George Washington University Hospital (1996), Neurology
George Washington University Medical Center (1997), Vascular Neurology
UT Health Science Center (1998), Neurocritical Care

Research Interest

  • Large Vessel Disease Ischemia
  • Moyamoya
  • Neurosonology
  • Preventative agents in Stroke
  • Reactivation of Stroke Symptoms
  • Small Subcortical Strokes


Fitness Training-Associated Vertebral Artery Dissection
Karim N, Johnson M Current sports medicine reports 2023 May 22 158-160
The effects of aneurysmal subarachnoid hemorrhage on cerebral vessel diameter and flow velocity
Wang RL, Gingrich KJ, Vance A, Johnson MD, Welch BG, McDonagh DL Journal of Stroke and Cerebrovascular Diseases 2023 May 32
Red blood cells as glucose carriers to the human brain: Modulation of cerebral activity by erythrocyte exchange transfusion in Glut1 deficiency (G1D)
Wang RC, Lee EE, De Simone N, Kathote G, Primeaux S, Avila A, Yu DM, Johnson M, Good LB, Jakkamsetti V, Sarode R, Holland AA, Pascual JM Journal of Cerebral Blood Flow and Metabolism 2023 Mar 43 357-368
Analysis of Prescriptions for Dual Antiplatelet Therapy after Acute Ischemic Stroke
Xian Y, Xu H, Matsouaka R, Laskowitz DT, Maisch L, Hannah D, Smith EE, Fonarow GC, Bhatt DL, Schwamm LH, Mac Grory B, Feng W, Fosbøl EL, Peterson ED, Johnson M JAMA Network Open 2022 Jul 5 E2224157
Recent Trends in Electively Treated Unruptured Intracranial Aneurysms
Salahuddin H, Siddiqui NS, Castonguay AC, Johnson M, Zaidi SF, Jumaa MA Journal of Stroke and Cerebrovascular Diseases 2019 Jul 28 2011-2017
Final Results of the RHAPSODY Trial: A Multi-Center, Phase 2 Trial Using a Continual Reassessment Method to Determine the Safety and Tolerability of 3K3A-APC, A Recombinant Variant of Human Activated Protein C, in Combination with Tissue Plasminogen Activator, Mechanical Thrombectomy or both in Moderate to Severe Acute Ischemic Stroke
Author Collaboration tN, Lyden P, Pryor KE, Coffey CS, Cudkowicz M, Conwit R, Jadhav A, Sawyer RN, Claassen J, Adeoye O, Song S, Hannon P, Rost NS, Hinduja A, Torbey M, Lee JM, Benesch C, Rippee M, Rymer M, Froehler MT, Clarke Haley E, Johnson M, Yankey J, Magee K, Qidwai J, Levy H, Mark Haacke E, Fawaz M, Davis TP, Toga AW, Griffin JH, Zlokovic BV Annals of Neurology 2019 Jan 85 125-136
Rivaroxaban or aspirin for patent foramen ovale and embolic stroke of undetermined source: a prespecified subgroup analysis from the NAVIGATE ESUS trial
Author Collaboration NE, Kasner SE, Swaminathan B, Lavados P, Sharma M, Muir K, Veltkamp R, Ameriso SF, Endres M, Lutsep H, Messé SR, Spence JD, Nedeltechev K, Perera K, Santo G, Olavarria V, Lindgren A, Bangdiwala S, Shoamanesh A, Berkowitz SD, Mundl H, Connolly SJ, Hart RG, Abdelhamid N, Abdul Rahman D, Abdul-Saheb M, Abreu P, Abroskina M, Abu Ahmad F, Accassat S, Acciaresi M, Adami A, Ahmad N, Ahmed F, Alberto Hawkes M, Alemseged F, Ali A, Altavilla R, Alwis L, Amarenco P, Amaro S, Amaya Sanchez LE, Amelia Pinto A, Ameriso SF, Amin H, Amino T, Amjad AK, Gebreyohanns M, Johnson M, Magadan A, Shang T The Lancet Neurology 2018 Dec 17 1053-1060
An Audit of Thrombophilia Testing in Patients with Ischemic Stroke or Transient Ischemic Attack: The Futility of Testing
Gavva C, Johnson M, De Simone N, Sarode R Journal of Stroke and Cerebrovascular Diseases 2018 Nov 27 3301-3305
Amphetamine and other pharmacological agents in human and animal studies of recovery from stroke
Walker-Batson D, Mehta J, Smith P, Johnson M Progress in Neuro-Psychopharmacology and Biological Psychiatry 2016 Jan 64 225-230
Mechanical Thrombectomy in Cerebral Venous Thrombosis
Siddiqui FM, Dandapat S, Banerjee C, Zuurbier SM, Johnson M, Stam J, Coutinho JM Stroke 2015 May 46 1263-1268

Honors & Awards

  • Trephined Cranium Award
    Resident Award for Excellence in Teaching (2019)
  • Stroke Volunter Award
    Dallas/Fort Worth and East Texas AHA South Central Affiliate (2007)
  • Gold Level of service PACT
    Employee Recognition Program (2006)
  • Trephined Cranium Award
    Resident Award for Excellence in Teaching (2005)
  • American Academy of Neurology Scholarship for Residents
    Selected by faculty in residency program (1996)
  • Alpha Omega Alpha
    Since medical school cum laude graduation (1992)

Professional Associations/Affiliations

  • American Academy of Neurology
  • American Society of Neuroimaging
  • American Stroke Association (1997)
  • World Stroke Organization