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We are surgeons specialized in treating diseases of the liver, pancreas and biliary system. We operate at Health Sciences North Hospital in Sudbury, Ontario which serves the catchment area of Northeastern Ontario. We are affiliated with the Northern Ontario School of Medicine and are involved in training medical students and residents. 

Dr. Jeffrey Shum MD, FRCSC, FACS

Dr. Jeffrey Shum is from London, ON. He completed his MD at Queen's University in Kingston before returning to London and completing a General Surgery and Critical Care Fellowship at Western University. He then completed a Multi-Organ Transplant Fellowship in 2012. ​

Dr. Kengo Asai MD, PhD, FRCSC

Dr. Kengo Asai is from Saskatoon, SK. He completed his MD/PhD followed by General Surgery at the University of Toronto. He then completed a Fellowship in HPB Surgery at the Mayo Clinic in Rochester MN.  

Dr. Sanjay Patel MBBS, MSc, FRCSC

Dr. Sanjay Patel is from London ON. He attended the Royal College of Surgeons in Ireland completing a degree in Medicine. Dr. Patel continued his training in General Surgery, Multi-Organ Transplant and Hepato-Pancreato-Biliary Surgery.

at Western University.

Ms. Tammy Gravelle

Tammy Gravelle graduated from the Medical Office Administration program in 2006. She worked at Health Sciences North and for family physicians before joining HPB Surgery in 2018.

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