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University Health Network (UHN)

University Health Network (UHN)
Toronto Western Hospital
The University Health Network (UHN) Toronto Western Hospital joined the University of Toronto Collaborative Bariatric Surgery Program in August 2009. A collaborative program is one in which several hospitals work together to provide patient care.
Potential bariatric surgery patients come to the Toronto Western Hospital for all assessment, education and follow-up appointments and are assigned to one of three hospitals for surgery; Toronto Western Hospital, Toronto East General Hospital, or St. Michael’s Hospital.

See diagram below. The team members from all three sites share resources, knowledge and expertise to provide exceptional patient care.

Toronto Western Hospital Toronto East General Hospital St. Michael's Hospital

The Toronto Western Hospital Bariatric Surgery Program aims to enhance bariatric surgery outcomes in terms of weight, quality of life and functioning.

Our mission is to:
  • Advance standards of excellence in bariatric surgery procedures and psychosocial outcomes
  • Enhance patient experiences and outcomes with bariatric surgery using a holistic model
  • Utilize a comprehensive, integrated interdisciplinary model fo care tailored to individual patient needs

The Bariatric Health Team

Bariatric patients like any other type of patient have many issues that range from their physical body to their mental health. Therefore, in order to achieve long-term weight loss success patients may require help in several areas of their life. For this reason, the Bariatric Health Team at Toronto Western Hospital is interdisciplinary. Members of the Bariatric Health Team include Surgeons, Nurse Practitioners, Dietitians, Social Workers, Psychologists, Psychiatrists, and Administrative Staff.


Toronto Western Hospital:
  1. Allan Okrainec, MDCM, MHPE, FACS, FRCSC
  2. Todd Penner MD
  3. David R Urbach MD MSc FRCSC FACS
  4. Dr. Timothy Jackson, BSc, MD, MPH, FRCSC
Toronto East General Hospital
  1. Dr. Jamie Cyriac, MD, FACS, FRCSC
  2. Dr. Mary-Anne Aarts, MD, MSc, FRCSC
St. Michael’s Hospital:
  1. Teodor Grantcharov MD, PhD
  2. Ori D. Rotstein, M.D. FRCSC, FACS
Pre-surgical Assessment and Education Appointments All patients must attend the following appointments prior to receiving a date for surgery. Some appointments can be done through Telehealth for patients who live outside of the GTA.
  • Bariatric Surgery Group Orientation Class
  • Nursing Assessment
  • Social Work Assessment
  • Bariatric Surgery Group Nutrition Education Class
  • Nutrition Assessment
  • Psychologist/Psychiatrist Assessment
  • Surgical Assessment
Important: Other assessments, medical tests and appointments may be required in order to determine if a patient is an appropriate candidate for surgery. These assessments may include but are not limited to endocrinology, medicine, sleep, nutrition or psychology. Also note that due to scheduling constraints appointments may not take place in this specific order.

Post-surgical Follow-up Appointments
Post-surgical follow-up appointments may include the Surgeon, Nurse Practitioner, Dietitian, Social Worker, Psychologist and Psychiatrist. Patients will have a minimum of 6 visits to the Toronto Western Hospital for follow-up in the first year after surgery and once yearly for the following 4 years. The bariatric health team is also available to answer any questions or address concerns by e-mail or telephone.

Contact Us
Toronto Western Hospital
Bariatric Surgery Program
4th Floor East Wing, Room 460
399 Bathurst St., Toronto, ON M5T 2S8
Tel: (416) 603-5800 ext. 6145