Dr Janssen is an experienced neurologist with broad interests including headache, migraine, TIA, stroke, memory disorders and all general neurological symptoms ranging from tingling/numbness to tremor. 

Dr Janssen has been a consultant neurologist at Chelsea and Westminster, Royal Brompton, and Charing Cross Hospitals since 2005. Having been clinical lead for TIA and neurology in 2015, he was appointed service director for neurology and stroke at Chelsea and Westminster Hospital. He leads the clinical team at Chelsea and Westminster, personally provides acute neurology input to the Royal Brompton Hospital, and contributes to stroke services at Charing Cross Hospital, the leading hyperacute stroke service in the UK. He is a GMC recognised trainer and keen teacher of medical students and junior staff.

In the independent sector, he prides himself on providing a personal service with clinics at HCA's Lister Hospital Chelsea Outpatient Centre and Chiswick Medical Centre. He is also co-chair of HCA joint neurology and neuro-rehabilitation council, part of HCA's Neurosciences department.

Diseases, Medical Tests and Treatments

• Headache
• TIA
• stroke
• memory disorders
• Alzheimer's disease
• cognitive impairment
• general neurology