Lionel Marks de Chabris, CCFP(EM), FCFP, DAAPM, CAAPM, DABAM
Dr. Marks de Chabris is an Ontario based physician and full-time clinician with a practice focus in Chronic Pain Management and Addiction Medicine.
A graduate of McGill University Medical School, he was board certified by the College of Family Physicians of Canada in Family Medicine and then in Emergency Medicine in
1991. He became a Fellow of the College in 2001.
In 2000 Dr. Marks de Chabris went on to obtain US board
certification in Emergency Medicine from the American Board of Emergency Medicine.
Dr. Marks de Chabris became an Assistant Professor at Northern Ontario School of Medicine and continues to teach at what has now become NOSM University, Canada's first
independent medical university.
Starting in 2006 he did further training in Addiction Medicine and Chronic Pain Management, sponsored by the College of Family Physicians of Canada and the Canadian Medical
In 2009, Dr. Marks de Chabris began limiting his work in Emergency Medicine and focused his practice in Chronic Pain Management and Addiction Medicine.
In 2012 he founded one of only 3 Chronic Pain Clinics in Northern Ontario.
He is a Diplomate of the American Academy of Pain Management and the Canadian Academy of Pain Management and a Diplomate of the American Board of Addiction
Dr. Marks de Chabris has been a Mentor in Addiction Medicine and Pain Medicine for the Ontario College of Family Physicians and a Medical Inspector and Clinical Supervisor for
the College of Physicians and Surgeons of Ontario.
In 2019 Dr. Marks de Chabris became the Chief Medical Officer (CMO) of ZYUS Life Sciences, an early stage pharmaceutical company. He continues to work as an Independent Medical
Examiner (previously certified by the American Board of Independent Medical Examiners) and is a member in good standing of the Canadian Society of Medical Evaluators.
In addition to his work as Chief Medical Officer for ZYUS Life Sciences, Dr. Marks de Chabris lectures widely, both nationally and
internationally on topics related to pain, addictions and cannabinoid medicine.