Dr. Stefan Hasler

Dr. Stefan Hasler is a senior consultant neurologist serving the Principality of Liechtenstein through a dual appointment at the Liechtensteinisches Landesspital in Vaduz and the Kantonsspital St. Gallen in Switzerland. With over 20 years of clinical experience in neurology, Dr. Hasler is the principal specialist responsible for neurological care in Liechtenstein, a sovereign microstate of approximately 38,000 people that, by necessity of scale, integrates closely with Switzerland's healthcare infrastructure.

Dr. Hasler's primary clinical interests are multiple sclerosis, epilepsy, and headache disorders including chronic migraine and cluster headache. His appointment at the Kantonsspital St. Gallen — one of the largest cantonal hospitals in eastern Switzerland with a well-established neurology department — enables him to access high-volume inpatient neurology care, advanced neurodiagnostic facilities, and collegial support from a team of specialist neurologists, which complements the more limited resources of the Landesspital in Vaduz.

Dr. Hasler trained at the Universität Zürich before undertaking his neurology residency at the Universitätsspital Zürich (USZ), Switzerland's foremost academic teaching hospital. He subsequently completed a fellowship in multiple sclerosis and neuroimmunology at the Inselspital Bern, working within the Swiss Multiple Sclerosis Registry and gaining expertise in the full range of disease-modifying therapies available for MS.

In Liechtenstein, Dr. Hasler has established a comprehensive outpatient neurology clinic at the Landesspital, providing local residents with access to specialist neurological assessment, EEG, nerve conduction studies, and MS monitoring without requiring travel to Switzerland. For complex inpatient neurological conditions, advanced neuroradiological procedures, or epilepsy surgery evaluations, he coordinates referrals to the Kantonsspital St. Gallen or Universitätsspital Zürich.

Dr. Hasler completed his medical degree at the Universität Zürich, Faculty of Medicine, one of Switzerland's leading research-intensive universities. He undertook his neurology residency at the Universitätsspital Zürich (USZ), receiving comprehensive training in all aspects of clinical neurology including acute stroke management, epilepsy, movement disorders, neuroimmunology, and neuromuscular diseases. He completed a subspecialty fellowship in multiple sclerosis and neuroimmunology at the Inselspital Bern (Universitätsspital Bern), working within the Swiss Multiple Sclerosis Centre and contributing to the Swiss MS Registry. He holds board certification in neurology from the Schweizerische Neurologische Gesellschaft (SNG) and is a credentialled member of the European Academy of Neurology (EAN). He completed advanced training in clinical neurophysiology — including EEG and EMG — through the SNG postgraduate programme and holds ATLS certification. He participates regularly in ECTRIMS and SNG educational activities to maintain currency in MS treatment advances.

Dr. Hasler's clinical practice encompasses the broad spectrum of neurological conditions encountered in a small-country neurology service. In multiple sclerosis, he manages patients through all disease phases — relapsing-remitting, secondary progressive, and primary progressive MS — selecting and monitoring disease-modifying therapies (DMTs) including interferon beta, natalizumab, ocrelizumab, cladribine, and fingolimod, with careful attention to PML risk stratification and JC virus antibody monitoring in patients on high-efficacy therapies.

For epilepsy, Dr. Hasler provides diagnostic evaluation using EEG (routine and ambulatory), video-EEG where indicated, and brain MRI interpretation. He manages anti-epileptic drug selection and optimisation, including the transition to newer agents such as lacosamide, brivaracetam, and perampanel for drug-resistant epilepsy, and coordinates referral to epilepsy surgery programmes at St. Gallen or Zurich for appropriate candidates.

In headache medicine, Dr. Hasler has a specialised interest in chronic migraine and cluster headache. He provides botulinum toxin injection therapy for chronic migraine prevention and manages CGRP-pathway antagonists — including erenumab, fremanezumab, and galcanezumab — for refractory migraine. He also manages peripheral neuropathy, Parkinson's disease, dizziness disorders, and cognitive impairment evaluations within his general neurology practice.

Dr. Hasler has contributed over 30 peer-reviewed publications to neurological journals including Multiple Sclerosis Journal, the European Journal of Neurology, and the Swiss Medical Weekly. His research is focused on MS disease registries and treatment outcomes in smaller European populations, and on cross-border neurology service coordination between Liechtenstein and eastern Switzerland. He has collaborated with the Swiss MS Registry coordinated by the Inselspital Bern, contributing Liechtenstein patient data to pan-Swiss and pan-European MS outcome analyses. His epilepsy research includes a retrospective analysis of anti-epileptic drug prescribing patterns in the Liechtenstein-St. Gallen catchment area. He has presented his findings at SNG annual meetings and has been invited to contribute to Swiss Society of Epileptology educational symposia. He is a co-author on a multicentre EAN-coordinated study examining MS treatment outcomes in small European nations.

Dr. Hasler treats patients from Liechtenstein, Switzerland, Austria, and southern Germany who access neurological services in the region. Liechtenstein's integration with the Swiss healthcare system means that Swiss-insured patients can access Dr. Hasler's services at the Kantonsspital St. Gallen under standard Krankenkasse provisions. Liechtenstein residents access neurological care through the national health insurance system. EU and EEA residents can access services under applicable cross-border healthcare regulations. Non-European private patients are accommodated at both the Landesspital and Kantonsspital St. Gallen. Consultations are conducted in German and English. For international patients seeking an independent neurological second opinion — particularly for MS diagnosis or treatment decisions — Dr. Hasler can arrange consultations with access to the full diagnostic resources of the Kantonsspital St. Gallen or, where appropriate, the Universitätsspital Zürich.

Dr. Hasler has been recognised by the Liechtensteinische Ärztekammer (LAeK) with its Clinical Excellence Recognition for his leadership of neurology services at the Landesspital and his role in establishing comprehensive local neurological care for Liechtenstein's population. He has been invited to present his research on MS management in small-country populations at SNG annual meetings and has contributed to EAN educational workshops on MS treatment initiation. He maintains active membership in the Schweizerische Neurologische Gesellschaft (SNG) and the European Academy of Neurology (EAN), participating in the continuing medical education programmes of both organisations.