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Dr. John Wyatt Crosby was born in Sarnia, Ontario, Canada, in 1947. He attended medical school at Western University in London, Ontario, where he graduated on the Dean’s Honour List in 1973. He received his FRCP (C) (Fellowship of the Royal College of Physicians of Canada) and MCFP (Member of the College of Family Physicians) in Emergency Medicine in 1983.

He is a Supervisor for The College of Physicians and Surgeons of Ontario. Assistant Professor of Medicine, University of Toronto and Family Medicine McMaster and Queens Universities.


An Ontario Medical Association Peer Leader who has lectured worldwide.


Has published 5 books and over 500 blogs for The Medical Post.


Voted Blogger of the Year for The Medical Post in 2022.

He was the Medical Director of Hilltop and Riverbend long-term care.


He was a Medical Consultant for Emergency Medical Services for the Province of Ontario, Director of the Oakville ER, and a Family Physician for 30 years in Cambridge, Ontario, Canada.

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