Overview
Dr. Justin McArthur is nationally and internationally recognized for his work in studying the natural history, development and treatment of the neurological complications of HIV/AIDS, multiple sclerosis and other neurological infections and immune-mediated neurological disorders. Dr. McArthur has also developed a technique to use cutaneous nerves to study sensory neuropathies, including those associated with chemotherapy, HIV and diabetes. Currently his clinical practice includes neuroimmunological disorders including MS, neurological infections, and complex undiagnosed neurological disorders. Dr. McArthur was the founding director of the Johns Hopkins/National Institute of Mental Health Research Center for HIV-associated Cognitive Disorders. The Center is an experienced interdisciplinary research team who have pooled their talents to study the nature of HIV-associated cognitive disorders. he is also the founding director of the Johns Hopkins Sheikh Khalifa Stroke institute. Dr. McArthur received his medical degree from Guys Hospital Medical School in London, UK. He then completed an internship and residency in internal medicine at The Johns Hopkins Hospital in Baltimore, MD. Dr. McArthur stayed with Johns Hopkins to complete a residency in neurology and achieve his Master's in public health. He is the current Director of the Johns Hopkins Department of Neurology and holds the John W. Griffin Professorship in neurology which was established in 2015 by Jeffrey and Harriet Legum. In April 2017 Dr. McArthur was elected to the Association of American Physicians. In 2020 he was inducted into the National Academy of Medicine.
Dr. Mcarthur is rated as an Experienced provider by MediFind in the treatment of Beta-Ketothiolase Deficiency. His top areas of expertise are Progressive Multifocal Leukoencephalopathy, Multiple Sclerosis (MS), Relapsing Multiple Sclerosis (RMS), and Encephalitis.
His clinical research consists of co-authoring 136 peer reviewed articles. MediFind looks at clinical research from the past 15 years.
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Locations
601 North Caroline Street, Floor 5, Floor 5, Baltimore, MD 21287
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
Johns Hopkins Outpatient Center
Dr. Sarah Kelley focuses on treating children with epilepsy with an emphasis on those who continue to have seizures after trying multiple medications. Dr. Kelley is the director of the Pediatric Epilepsy Monitoring Unit where she oversees the evaluation and management of children with difficult to control or difficult to diagnose epilepsy. She evaluates and manages patients who may be candidates for epilepsy surgery. Dr. Kelley has additional expertise in the treatment of children with electrical status epilepticus of sleep (ESES). Dr. Kelley is also very involved with teaching and education and in addition to attending in the Epilepsy Monitoring Unit is one of the Attending Physicians on the Pediatric Neurology Inpatient Service. Dr. Kelley received her medical degree from SUNY at Buffalo Medical School in New York. She then went on to complete her pediatrics residency training followed by her Child Neurology training at The Johns Hopkins Hospital in Baltimore. She then completed her fellowship in clinical neurophysiology/pediatric epilepsy at Johns Hopkins. Dr. Kelley sees patients with seizures/epilepsy on Tuesday afternoons and Wednesday and Thursday mornings in the Johns Hopkins Outpatient Center. Telemedicine visits with Dr. Kelley are available in some circumstances. Dr. Kelley is rated as an Advanced provider by MediFind in the treatment of Beta-Ketothiolase Deficiency. Her top areas of expertise are West Syndrome, Status Epilepticus, Seizures, Epilepsy, and Endovascular Embolization.
Johns Hopkins Outpatient Center
Arens Taga is a neurologist specializing in neuromuscular diseases, with a particular focus on amyotrophic lateral sclerosis (ALS) and other motor neuron diseases. His clinical work aims to improve the quality of care for patients with ALS through biomarker-based, precision medicine approaches that refine disease stratification and facilitate more targeted and efficient enrollment in clinical trials. As a clinician-scientist, Dr. Taga uses patient-derived induced pluripotent stem cells to model ALS, uncover novel disease mechanisms and identify therapeutic targets that are translatable to clinical trials. In recognition of his work in ALS, Dr. Taga was awarded the 2025 Richard Olney Clinician Scientist Development Award, which honors early-career physician-scientists dedicated to advancing ALS research. Dr. Taga earned his medical degree from the School of Medicine and Surgery at the University of Parma, Italy, where he also completed his neurology residency. He subsequently trained at The Johns Hopkins University, completing a postdoctoral research fellowship in the neuromuscular division, an internal medicine internship, a neurology residency and a neuromuscular clinical fellowship. Dr. Taga is rated as a Distinguished provider by MediFind in the treatment of Beta-Ketothiolase Deficiency. His top areas of expertise are 15q11.2 Microdeletion, Primary Lateral Sclerosis, Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig's Disease), and Cluster Headache.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Advanced
- EncephalitisDr. Mcarthur isAdvanced. Learn about Encephalitis.
- Multiple Sclerosis (MS)Dr. Mcarthur isAdvanced. Learn about Multiple Sclerosis (MS).
- Peripheral NeuropathyDr. Mcarthur isAdvanced. Learn about Peripheral Neuropathy.
- Progressive Multifocal Leukoencephalopathy
- Relapsing Multiple Sclerosis (RMS)Dr. Mcarthur isAdvanced. Learn about Relapsing Multiple Sclerosis (RMS).
- Experienced
- Adult Polyglucosan Body DiseaseDr. Mcarthur isExperienced. Learn about Adult Polyglucosan Body Disease.
- Andersen DiseaseDr. Mcarthur isExperienced. Learn about Andersen Disease.
- Anti-NMDA Receptor EncephalitisDr. Mcarthur isExperienced. Learn about Anti-NMDA Receptor Encephalitis.
- Beta-Ketothiolase DeficiencyDr. Mcarthur isExperienced. Learn about Beta-Ketothiolase Deficiency.
- Brachial PlexopathyDr. Mcarthur isExperienced. Learn about Brachial Plexopathy.
- CACH SyndromeDr. Mcarthur isExperienced. Learn about CACH Syndrome.