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Division of Gastroenterology

Department of Medicine
Women's College Hospital

The Division of Gastroenterology at Women's College Hospital consists of 3 full-time faculty members. As general Gastroenterologists we provide consultative and endoscopic services in an outpatient setting. The focus of the division is on quality and innovation, colon cancer screening, Inflammatory Bowel Disease, Women’s health and the ambulatory clinical teaching of both medical students and residents.

Welcome to Gastroenterology

Our goal is to provide both exceptional clinical care and superior ambulatory teaching. The Division prides itself on providing support to both primary care physicians and other specialists requiring timely consultations for their patients.

Clinics & Clinical Care

The Gastroenterology Division sees a broad range of gastrointestinal diseases. Along with consultations and follow-up ambulatory visits we provide Endoscopic procedures including both colonoscopy and gastroscopy. Our program also has a keen interest in colorectal cancer screening, GI diseases in Women and Inflammatory Bowel disease.

Providing Expert Care in:

  • Acid-related gastrointestinal diseases:
    gastroesophageal reflux disease (GERD) & peptic ulcer disease
  • Management of common gastrointestinal symptoms:
    e.g., diarrhea, constipation, abdominal pain, weight loss, dysphagia etc.
  • Inflammatory bowel disease (IBD) – Crohn’s disease & Ulcerative Colitis
  • Irritable bowel syndrome (IBS)
  • Celiac Disease
  • Colorectal cancer screening
  • Hepatobiliary disorders

Making an appointment

Patients are seen only by referral from a physician.

Referring a patient

Download and complete the patient referral form from the Gastroenterology Clinic page.

Gastroenterology Team

Division Head

  • Dr. Jeff Stal (click to show/hide biography)

    Dr. Jeff Stal

    Dr. Stal received his medical degree from the University of Western Ontario in 1992. He completed his training in Internal Medicine at the University of Toronto in 1995 and then completed subspecialty training in Gastroenterology at the University of Western Ontario in 1997. Dr. Stal joined the Division of Gastroenterology at Women's College Hospital in 1998 as a clinician teacher. In 2004, he completed the two-year Master Teacher Program offered by the Department of Medicine at U of T. Dr. Stal is an Associate Professor of Medicine at the University of Toronto.

    In May 2013, Dr. Stal became the Division Head of Gastroenterology at WCH. He took on the role as Physician Champion of WCH’s ambulatory electronic patient record (aEPR) in April 2015.

    In 2005, Dr. Stal was the recipient of the Ambulatory Teaching Award from the Department of Medicine at Sunnybrook & Women’s College in recognition of excellence in teaching in the outpatient setting of both undergraduate students and postgraduate trainees. In 2007, he was the recipient of the WCH Pre-Clerkship Education Award for outstanding performance and lasting contribution to Pre-Clerkship Education. In 2012, he was the recipient of the WCH Undergraduate Education Award in recognition of excellence in teaching, educational leadership, and educational administration at the Undergraduate level. Also in 2012, Dr. Stal was awarded the Lou Cole Award for educational excellence in the GI Division at U of T.


  • Dr. Natasha Bollegala (click to show/hide biography)

    Dr. Natasha Bollegala

    Dr. Natasha Bollegala, BSc Hons, MD, MSc, FRCPC, is a staff gastroenterologist at Women’s College Hospital, Assistant Professor in the Department of Medicine, University of Toronto (UofT), and Fellow in the Institute of Clinical Evaluative Sciences (ICES). She is a clinician investigator in quality and innovation, Department of Medicine, UofT. She completed an Inflammatory Bowel Disease (IBD) fellowship at Mount Sinai Hospital, an MSc in clinical epidemiology and healthcare research at UofT in 2016, the Eliot Phillipson Clinician Scientist Training Program and UofT’s Clinician Investigator Program.

    Dr. Bollegala has an interest in the area of quality improvement and vulnerable populations in IBD. She conducts research related to IBD with a particular focus on pediatric to adult transition of care. She serves as the quality improvement advisor to the colonoscopy Quality Management Partnership, CPSO. She co-chairs the Canadian IBD Transition Network. She leads the QI primer initiative with the quality affairs board of the Canadian Association of Gastroenterology and is on the Board of Directors for the Ontario Association of Gastroenterology. 

  • Dr. Talia Zenlea (click to show/hide biography)

    Dr. Talia Zenlea

    Dr. Talia Zenlea received her medical degree from the University of Vermont in 2006. She completed her residency in internal medicine at Yale University/Yale-New Haven Hospital, where she served as Chief Resident. She completed three years of subspecialty training in gastroenterology at Harvard University/Beth Israel Deaconess Medical Center, where she had a clinical focus in Inflammatory Bowel Diseases (IBD). Thereafter, she joined the faculty at Brown University as an Assistant Professor of Medicine at Alpert Medical School, and acted as the Director of the Inflammatory Bowel Diseases Center at the Women’s Medicine Collaborative.

    Dr. Zenlea joined the Division of Gastroenterology at Women's College Hospital in 2014 as an Assistant Professor of Medicine at the University of Toronto. She was appointed the Associate Program Director for the GI Training Program in 2018. She is otherwise a full-time clinician, with a clinical interest in inflammatory bowel disease, particularly in pregnancy.

The Gastroenterology Division at Women’s College Hospital is actively involved in a variety of research initiatives both at our institution and through partnerships with other University of Toronto hospitals.

Models of Care

The division is committed to the development of new models of care to keep up with the ever-changing health care system and developing innovative ways to better serve patients. Through a collaboration with Mount Sinai Hospital, Dr. Bollegala is currently co-leading the IMPACT-IBD (Improving outcomes in the pediatric to adult transition – IBD) study, an ambulatory initiative whereby patients with pediatric onset Inflammatory Bowel Disease (IBD) have access to a transition nurse, helping to provide comprehensive continuous IBD-focused care as adolescents move from pediatric to adult care. We hope this initiative will improve both disease activity and quality of life during this period of change. Dr. Bollegala is also involved in the development of quality indicators in IBD transitional care and an IBD-specific transition-focused curriculum aimed at building knowledge, independence and confidence in the context of complex chronic disease. She is also committed to the development of novel methods in studying health resource utilization and patient centered healthcare outcomes through an electronic medical record system based at Women's College Hospital.

Dr. Zenlea recently launched bellyblog.ca, a site dedicated to providing high-quality GI heath information from an international team of experts. She and her collaborators at the University of Toronto are studying the ways in which social media can be used as a far-reaching patient education tool. You can follow Dr. Zenlea's Bellyblog on Facebook, Twitter, Pinterest and Instagram.

Inflammatory Bowel Disease

In addition to the development of new models of care in managing patients with inflammatory bowel disease, we are also involved in clinical and genetic research as we strive to learn more about this disease that affects over 230,000 Canadians. Through our partnerships, we are currently involved in research that explores different disease phenotypes, genetics, and extra-intestinal manifestations.

Clinical Trials

We actively participate in studies evaluating new therapies to treat patients with chronic diseases and the utility of new tests to help monitor these patients.

Our unique GI teaching program offers outstanding clinical teaching for medical students and Internal Medicine, Family Practice and GI residents in the ambulatory setting. We also provide excellent formal teaching at both the undergraduate and postgraduate levels.

Teaching clinics in GI at WCH are general Gastroenterology clinics offering extensive opportunities for trainees to see both new and follow-up patients on their own, followed by staff review, clinical and evidence-based teaching and valuable educational feedback.

Students and residents who are interested in an ambulatory Gastroenterology elective rotation at WCH should email Maria Almeida, the Academic Education Coordinator for the GI division at the following address: maria.almeida@wchospital.ca

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Location & Contact Information

Women's College Hospital
76 Grenville Street
4th floor
Toronto, ON M5S 1B2

Phone: 416-323-7543

Fax: 416-323-7549

The hospital is fully accessible. All clinics have wheelchair accessible washrooms.

Division Head: Dr. Jeff Stal

Manager: Lynn Carter

Clinic Coordinator: Paula Fuller

Our Publications

  • Fully affiliated with:
  • University of Toronto

  • A member of:
  • Council of Academic Hospitals of Ontario (CAHO)