Kelly Johnson-Arbor, MD, FACEP, FUHM, FACMT, is board-certified in emergency medicine, medical toxicology, and undersea and hyperbaric medicine. She serves as the medical director of hyperbaric medicine at MedStar Georgetown University Hospital and is also the co-medical director at National Capital Poison Center. She is an associate faculty member at the MedStar Institute of Quality and Safety and has extensive experience in the specialties of medical toxicology and hyperbaric oxygen therapy, including the diagnosis, treatment, and prevention of carbon monoxide poisoning.