Michael Ordon


Associate Scientist, Li Ka Shing Knowledge Institute


Dr. Michael Ordon is a Staff Urologist at St. Michael’s Hospital and an Associate Scientist in Li Ka Shing Knowledge Institute. Following his residency training at the University of Toronto, he completed a two-year fellowship at St. Michael’s Hospital specializing in kidney stones, minimally invasive urologic surgery and renal transplantation. During this time, he also completed a Master of Science in Clinical Epidemiology and Health Care Research through the Institute of Health Policy Management and Evaluation, at the University of Toronto. He also completed a second fellowship at the University of California Irvine focusing on image-guided ablation for small kidney tumours. His clinical practice focuses on the surgical management of complex kidney stones, renal transplantation, laparoscopic urology, and robotic-assisted surgery, as well as image guided cryoablation of small renal tumours. His primary research interest is in health services research and he holds an appointment as an Adjunct Scientist at the Institute for Clinical Evaluative Sciences (ICES). In particular, his research focuses on the epidemiology and treatment of kidney stone disease and outcomes research for renal transplantation.

Recent Publications

  1. Welk, B, McArthur, E, Ordon, M, Dirk, J, Dixon, S, Garg, AX et al.. Risk of rhabdomyolysis from 5-α reductase inhibitors. Pharmacoepidemiol Drug Saf. 2018;27 (3):351-355. doi: 10.1002/pds.4383. PubMed PMID:29368380 .
  2. Goldenberg, MG, Fok, KH, Ordon, M, Pace, KT, Lee, JY. Simulation-Based Laparoscopic Surgery Crisis Resource Management Training-Predicting Technical and Nontechnical Skills. J Surg Educ. 2017; :. doi: 10.1016/j.jsurg.2017.11.011. PubMed PMID:29273339 .
  3. Welk, B, McArthur, E, Ordon, M. Women Also Use 5α-Reductase Inhibitors-Reply. JAMA Intern Med. 2017;177 (11):1702. doi: 10.1001/jamainternmed.2017.6090. PubMed PMID:29114803 .
  4. Butz, H, Nofech-Mozes, R, Ding, Q, Khella, HWZ, Szabó, PM, Jewett, M et al.. Exosomal MicroRNAs Are Diagnostic Biomarkers and Can Mediate Cell-Cell Communication in Renal Cell Carcinoma. Eur Urol Focus. 2016;2 (2):210-218. doi: 10.1016/j.euf.2015.11.006. PubMed PMID:28723537 .
  5. Welk, B, McArthur, E, Ordon, M, Morrow, SA, Hayward, J, Dixon, S et al.. The risk of dementia with the use of 5 alpha reductase inhibitors. J. Neurol. Sci. 2017;379 :109-111. doi: 10.1016/j.jns.2017.05.064. PubMed PMID:28716218 .
  6. Welk, B, McArthur, E, Ordon, M, Anderson, KK, Hayward, J, Dixon, S et al.. Association of Suicidality and Depression With 5α-Reductase Inhibitors. JAMA Intern Med. 2017;177 (5):683-691. doi: 10.1001/jamainternmed.2017.0089. PubMed PMID:28319231 PubMed Central PMC5818776.
  7. Ordon, M, Welk, B, Li, Q, Wang, J, Lavigne, E, Yagouti, A et al.. Ambient Temperature and the Risk of Renal Colic: A Population-Based Study of the Impact of Demographics and Comorbidity. J. Endourol. 2016;30 (10):1138-1143. doi: 10.1089/end.2016.0374. PubMed PMID:27538756 .
  8. Barrett, K, Foell, K, Lantz, A, Ordon, M, Lee, JY, Pace, KT et al.. Best Stent Length Predicted by Simple CT Measurement Rather than Patient Height. J. Endourol. 2016;30 (9):1029-32. doi: 10.1089/end.2016.0105. PubMed PMID:27338649 .
  9. Lantz, AG, McKay, J, Ordon, M, Pace, KT, Monga, M, Honey, RJ et al.. Shockwave Lithotripsy Practice Pattern Variations Among and Between American and Canadian Urologists: In Support of Guidelines. J. Endourol. 2016;30 (8):918-22. doi: 10.1089/end.2016.0153. PubMed PMID:27246189 .
  10. Welk, B, Liu, K, Al-Jaishi, A, McArthur, E, Jain, AK, Ordon, M et al.. Repeated Diagnostic Imaging Studies in Ontario and the Impact of Health Information Exchange Systems. Healthc Q. 2016;19 (1):24-8. . PubMed PMID:27133604 .
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Affiliations & Other Activities

  • Staff Urologist, Department of Medicine, St. Michael’s Hospital
  • Adjunct Scientist, Institute For Clinical Evaluative Sciences