Patient-Centred Healthcare

Education - Research - Healthcare

Our Team

Dr. Tharsan Sivakumar, MD, MPH, FRCPC



Tharsan Sivakumar completed his post-graduate residency training in Internal Medicine through the Mount Sinai School of Medicine program in New York and New Jersey. Subsequently, Dr. Sivakumar obtained his Master of Public Health degree at The Dartmouth Institute for Health Policy and Clinical Practice. He also completed a second residency program in Leadership & Preventive Medicine, as well as his fellowship training in Endocrinology, through Dartmouth Medical School in New Hampshire.

Dr. Sivakumar is board certified by the American Board of Internal Medicine in Endocrinology, Diabetes & Metabolism as well as Internal Medicine. He is also a diplomate of the American Board of Clinical Lipidology. In addition, he is certified by the Royal College of Physicians and Surgeons of Canada in Internal Medicine as well as Endocrinology and Metabolism.

Dr. Sivakumar is the Director of the Institute of Diabetes & Endocrinology, and the President Elect of the AACE (American Association of Clinical Endocrinologists) Canadian Chapter.  His areas of clinical and research interest include diabetes, lipidology, and general endocrinology. He has publications in a number of prominent peer-reviewed medical journals.

Dr. Sivakumar speaks English and Tamil.



Dr. Peter Wan

Internal Medicine Specialist


Dr. Peter Wan is a General Internist who received his medical degree and Internal Medicine Specialist qualifications from the University of Toronto. He is a Fellow of the Royal College in Canada and has practiced as a General internist for 18 years in both the community and hospital setting in the GTA.

As a true General Internist, he has wide interests in many areas within internal medicine (from endocrinology/diabetes and bone densitometry to cardiology and cardiac diagnostics ).

He has worked for over 20 years in both the hospital and community care setting at various locations throughout the GTA. He has also lectured at numerous CME events on a variety of topics within Internal Medicine including diabetes.




Dr. Vibushitha Narendra, MD, DABIM


Dr. Narendra completed her Honours Bachelor of Science degree at University of Toronto.  She completed her Internal Medicine residency training at Louisiana State University in Shreveport, Louisiana.   Subsequently she completed a fellowship in Endocrinology, Diabetes & Metabolism at Louisiana State University.

She is a diplomate of the American Board of Internal Medicine (ABIM) for Internal Medicine & Endocrinology and is recognized by the College of Physicians and Surgeons of Ontario (CPSO) to practice as a specialist in Ontario.  

She speaks Tamil and English.




Dr. Rahim Khorassani-zadeh, MD



Dr. Khorassani completed his residency in Internal Medicine and fellowship in Endocrine & Metabolism at Louisiana State University Health in Shreveport, Louisiana.
Dr. Khorassani is board certified by the American Board of Internal Medicine in Internal Medicine and as well Endocrinology & Metabolism.
Dr. Khorassani speaks English and Farsi.