Dr. Stephen is board certified in neurology and is an attending neurologist at the Massachusetts General Hospital and Brigham & Women’s Hospital and an Instructor in Neurology at Harvard Medical School. He obtained his medical degree at the University of Aberdeen in Scotland, UK and completed internal medicine residency training in the UK at the University of Edinburgh and University of Nottingham programs. After attaining his Membership of the Royal College of Physicians in 2009, he pursued further training as a specialist registrar in neurology at the University of Cambridge and was an Honorary Specialist Registrar at the National Hospital for Neurology and Neurosurgery, Queen Square, London, UK. He completed his internship and Neurology residency at the Beth-Israel Deaconess Medical Center/Children’s Hospital Harvard neurology program followed by a Fellowship in Movement Disorders and Ataxia at the combined Partners Mass General Brigham Massachusetts General Hospital and Brigham and Women's Hospital program with additional pediatric experience at Boston Children’s Hospital.

In the Division of Movement Disorders, Dr. Stephen treats patients with Parkinson's disease, tremor and other movement disorders, with a special interest in dystonia and ataxia. He has also been involved with the Brigham & Women’s Hospital Performing Arts Clinic since 2010, where he has been treating musicians since 2014. His research interests lie in the overlap between dystonia and ataxia and especially the spinocerebellar ataxias. He is also conducting research on neurological problems in musicians and is part of an international research collaborative on musician’s dystonia. He is a member of the clinical and research team at the Massachusetts General Hospital Collaborative Center for X-linked Dystonia Parkinsonism and a member of the MGH Center for Rare Neurological Diseases.