Ahmed M. Bayoumi

MD, MSc

Scientist

Biography

Dr. Ahmed Bayoumi is a Scientist at MAP Centre for Urban Health Solutions at the Li Ka Shing Knowledge Institute of St. Michael’s Hospital, where he is also a general internist and Human Immunodeficiency Virus (HIV) physician. He holds the Fondation Baxter and Alma Ricard Chair in Inner City Health at St. Michael’s Hospital and the University of Toronto and is a Professor in the Department of Medicine and in the Institute of Health Policy, Management and Evaluation at the University of Toronto. He is a Senior Adjunct Scientist at ICES. He has extensive experience in translating research to policy (member of the Canadian Drug Expert Committee, past Scientific Director of Converge3, past president of the international Society for Medical Decision Making, and past Director of Clinical Epidemiology and Health Care Research at the University of Toronto). He has co-led large multi-method studies, including the highly impactful Toronto and Ottawa Supervised Consumption Assessment (TOSCA) and the Marginalization and COVID-19 (MARCO) studies. His research interests include the delivery of health services, particularly to people who use drugs, people living with HIV, and other marginalized populations. He is a member of HMRAC (the Homelessness, Mortality, Research and Advocacy Coalition), an academic – community collaboration that meets regularly to discuss how research can address issues related to homelessness.

Recent Publications

  1. Gomes, T, McCormack, D, Kolla, G, Young, S, Bayoumi, AM, Smoke, A et al.. Comparing the effects of prescribed safer opioid supply and methadone in Ontario, Canada: a population-based matched cohort study. Lancet Public Health. 2025;10 (5):e412-e421. doi: 10.1016/S2468-2667(25)00070-2. PubMed PMID:40280140 .
  2. Firestone, M, Khoee, K, Kolla, G, O'Campo, P, Nisenbaum, R, Holness, DL et al.. COVID-19 isolation and recovery sites evaluation: Lessons learned for systems innovation. Can J Public Health. 2025; :. doi: 10.17269/s41997-025-01031-7. PubMed PMID:40279072 .
  3. Ledlie, S, Tadrous, M, Bayoumi, AM, McCormack, D, Besharah, J, Munro, C et al.. Pathways of care following opioid overdose among people with opioid use disorder: A multilevel cohort study. Drug Alcohol Depend. 2025;271 :112643. doi: 10.1016/j.drugalcdep.2025.112643. PubMed PMID:40106957 .
  4. Young, S, Raboud, J, Dodd, Z, DeBeck, K, Milloy, MJ, Wilson, D et al.. Examining the association between fentanyl use and perceived adequacy of methadone dose: A retrospective cohort study. Drug Alcohol Depend. 2025;267 :112547. doi: 10.1016/j.drugalcdep.2024.112547. PubMed PMID:39793366 .
  5. Persaud, S, Fitzgerald, M, Hawken, S, Tanuseputro, P, Boucher, L, Petrcich, W et al.. The association of combinations of social factors and SARs-CoV-2 infection: A retrospective population-based cohort study in Ontario, 2020-2021. Dialogues Health. 2024;5 :100197. doi: 10.1016/j.dialog.2024.100197. PubMed PMID:39717675 PubMed Central PMC11664076.
  6. Saleh, MA, Abdelhamid, HM, Bayoumi, AM. Thermal, mechanical, and electrical properties of Si-stacked nanosheet transistors using machine learning interatomic potentials. Nanotechnology. 2024; :. doi: 10.1088/1361-6528/ad8357. PubMed PMID:39366407 .
  7. Torres, S, Bayoumi, AM, Abrahao, ABK, Trudeau, M, Pritchard, KI, Li, CN et al.. Implementing routine collection of EQ-5D-5L in a breast cancer outpatient clinic. PLoS One. 2024;19 (8):e0307225. doi: 10.1371/journal.pone.0307225. PubMed PMID:39190702 PubMed Central PMC11349211.
  8. Refaie, MMM, El-Hussieny, M, Bayoumi, AMA, Abdelraheem, WM, Abdel-Hakeem, EA, Shehata, S et al.. Sacubitril/valsartan alleviates sepsis-induced myocardial injury in rats via dual angiotensin receptor-neprilysin inhibition and modulation of inflammasome/caspase 1/IL1β pathway. Eur J Pharmacol. 2024;979 :176834. doi: 10.1016/j.ejphar.2024.176834. PubMed PMID:39038638 .
  9. Emad, D, Bayoumi, AMA, Gebril, SM, Ali, DME, Waz, S. Modulation of keap-1/Nrf2/HO-1 and NF-ĸb/caspase-3 signaling pathways by dihydromyricetin ameliorates sodium valproate-induced liver injury. Arch Biochem Biophys. 2024;758 :110084. doi: 10.1016/j.abb.2024.110084. PubMed PMID:38971420 .
  10. Kolla, G, Khorasheh, T, Dodd, Z, Greig, S, Altenberg, J, Perreault, Y et al.. "Everybody is impacted. Everybody's hurting": Grief, loss and the emotional impacts of overdose on harm reduction workers. Int J Drug Policy. 2024;127 :104419. doi: 10.1016/j.drugpo.2024.104419. PubMed PMID:38599035 .
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Affiliations & Other Activities

  • Scientist, MAP Centre for Urban Health Solutions, St. Michael’s Hospital
  • Professor, Department of Medicine, University of Toronto
  • Professor, Institute of Health Policy, Management and Evaluation, University of Toronto