Biographical summary
Gregory S. Day, M.D., is a neurologist, with special interest in the diagnosis and management of Alzheimer disease and related causes of dementia. He has additional expertise in the evaluation and treatment of patients with the following rare conditions:
    - Rapidly progressive dementia
- Autoimmune (inflammatory) encephalitis
- Reversible causes of dementia
- Early-onset dementia
In addition to clinical work, Dr. Day is active in clinical research. He conducts observational studies and clinical trials in Alzheimer disease, rapidly progressive dementia, autoimmune encephalitis, and autoimmune-causes of cognitive impairment. He has authored more than 70 indexed scientific publications, and is an active member of the American Academy of Neurology where he serves on a number of committees focused on improving neurology practice. His research is sponsored by the National Institute on Aging, National Institute of Neurological Disorders and Stroke, Alzheimer's Association, and Chan-Zuckerberg Initiative.
        Conditions treated
        Procedures performed
        Interests
- Rapidly progressive dementia
- Reversible dementias
- Autoimmune dementias / autoimmune encephalitis
- Creutzfeldt-Jakob disease
- Alzheimer disease and other dementias
- Early-onset dementias
Mayo Clinic locations
        Education
- 2020Master of Science - Clinical InvestigationWashington University in St. Louis 
- 2018Graduate Certificate - Clinical InvestigationWashington University in St. Louis 
- 2015Fellowship - Memory and AgingWashington University in St. Louis 
- 2014Residency - Adult NeurologyUniversity of Toronto 
- 2009MDQueen's University 
- 2006MSc - Neuroscience StudiesQueen's University 
- 2003BS - Life Sciences (Research Stream)Queen's University 
Activities and honors
Certifications
- 2017NeurologyAmerican Board of Psychiatry and Neurology 
Awards and honors
- 2024Fellow of the American Neurological AssociationAmerican Neurological Association 
- 2023Top Performing Provider Patient Experience AwardMayo Clinic 
- 2022Top Performing Provider Patient Experience AwardMayo Clinic 
- 20212020 Mayo Clinic Experience Award 
Mayo Clinic 
- 2021Fellow of the American Academy of NeurologyAmerican Academy of Neurology 
- 2019Sven Eliasson Award for Teaching Excellence; Department of NeurologyWashington University School of Medicine 
- 2019Emerging Leaders ProgramAmerican Academy of Neurology 
- 2018Alene & Meyer Kopolow AwardWashington University, Barnes Jewish Hospital Foundation 
- 2018Travel FellowshipAmerican Neurological Association 
- 2017Travel FellowshipAlzheimer's Association International Conference 
- 2016Fellow Scholarship to the Annual MeetingAmerican Academy of Neurology 
- 2015Distinguished Reviewer of the YearCanadian Journal of Neurological Sciences 
- 2015Travel FellowshipAlzheimer's Association International Conference 
- 2014André Barbeau Memorial PrizeCanadian Neurological Society 
- 2014J.T. Marotta Teaching Award University of Toronto 
- 2013Chief ResidentUniversity of Toronto 
- 2013John Wherrett AwardUniversity of Toronto 
- 2013Future Leader Award in DementiaPfizer 
- 2013Top Submission AwardHealth Science Inquiry Journal 
- 2012Joseph M West Family Memorial FundUniversity of Toronto 
Professional memberships
- 2025 - presentCommittee MemberAmerican Academy of Neurology 
- 2024 - presentMemberClinical Trials Committee, Mayo Clinic Research Committee, Mayo Clinic Committees 
- 2024 - presentFellowAmerican Neurological Association 
- 2023 - presentCo - ChairAmerican Neurological Association 
- 2023 - presentCommittee MemberAmerican Academy of Neurology 
- 2023ChairpersonAmerican Neurological Association 
- 2022 - presentChairClinical Research Operations Group 
- 2022 - presentCo-ChairAmerican Neurological Association 
- 2022Co-ChairAmerican Neurological Association 
- 2021 - presentVice ChairResearch Committee, Department of Neurology 
- 2021 - presentChairNeuroscience Research Committee, Department of Neurology 
- 2021 - presentDirectorNeurology, Staffing and Scheduling Committee, Division Committees 
- 2021 - presentFellowAmerican Academy of Neurology 
- 2021 - 2024Committee ChairAmerican Academy of Neurology 
- 2020 - 2023Committee ChairAmerican Academy of Neurology 
- 2019 - presentMemberCanadian Neurological Society 
- 2018 - presentFellowAmerican Neurological Association 
- 2018 - presentMemberAlzheimer’s Association International Society to Advance Alzheimer’s Research and Treatment 
- 2017 - 2019Medical Advisory Board - MemberAlzheimer's Association, Greater Missouri Chapter 
- 2016 - 2020Committee MemberAmerican Academy of Neurology 
- 2016 - presentCommittee MemberWashington University School of Medicine 
- 2015 - 2021Committee MemberAmerican Academy of Neurology 
- 2007 - presentMemberAmerican Academy of Neurology 
Publications
Research activities