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Natasha Tobarran, DO

Natasha Tobarran

Assistant Professor of Emergency MedicineProgram Director, Medical Toxicology Fellowship

Dr. Tobarran is a board-certified emergency physician and medical toxicologist and an Assistant Professor of Emergency Medicine at the George Washington University School of Medicine and Health Sciences. She serves as Program Director of the GW Medical Toxicology Fellowship and practices emergency medicine at George Washington University Hospital and Walter Reed National Military Medical Center.

Bachelor's degree

BA, College of the Holy Cross

Medical degree

DO, University of New England College of Osteopathic Medicine

Residency and fellowship training

  • Residency in Emergency Medicine, WellSpan York Hospital
  • Fellowship in Medical Toxicology, Virginia Commonwealth University

Special interests

Medical toxicology education, management of critically ill poisoned patients, mentorship of medical students, residents, and fellows

Publications

Abstracts and poster presentations

  1. Doan A, Lee M, Tobarran N, King JD. Mind the gap: severe mixed ethanol-isopropanol toxicity in a pediatric patient. Poster accepted, American College of Medical Toxicology Annual Scientific Meeting; 2026.
  2. Markin K, Khatib M, Bourgeois K, Tobarran N, King JD. Unusual presentation of diethylene glycol toxicity: severe metabolic acidosis without renal or neurologic sequelae. Poster accepted, American College of Medical Toxicology Annual Scientific Meeting; 2026.
  3. Markin K, Tobarran N, King JD. Severe ethylene glycol poisoning presenting with early hypernatremia and polyuria. Poster accepted, American College of Medical Toxicology Annual Scientific Meeting; 2026.
  4. Doan A, Berle L, Tobarran N, King JD. Substantial toxicity after intralesional injection of methotrexate for skin cancer in a patient with end-stage renal disease. Poster accepted, North American Congress of Clinical Toxicology Annual Meeting; October 2026.
  5. Markin K, Khatib M, Tobarran N, Schultz B, King JD. Into the wrong space: a case of intrathecal gadolinium neurotoxicity. Poster accepted, North American Congress of Clinical Toxicology Annual Meeting; October 2026.

Online reference chapters

  1. Tobarran N, Wills B. Black widow spider envenomation. ClinicalKey. Elsevier BV. Released March 15, 2023.
  2. Tobarran N, Michienzi A. Gamma hydroxybutyrate toxicity. ClinicalKey. Elsevier BV. Updated November 19, 2023.
  3. Michienzi AE, Tobarran N. Cadmium toxicity. ClinicalKey. Elsevier BV. Updated August 26, 2024.
  4. Singh S, Tobarran N. Thyroid supplement toxicity and poisoning. In: Swadron S, Nordt S, Mattu A, eds. CorePendium. 6th ed. CorePendium, LLC; updated July 31, 2026.