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Gastroenterology, Hepatology and Nutrition

Who we are

Our physicians, nurses, allied health professionals, research and administrative staff work closely as a team to achieve our objectives in patient care, research and education.

Faculty | Fellows | Nurse Practitioners | Clinic Nurses | Dietitians | Administrative Assistants | Clinic Clerks | Research Coordinators

Full Time Staff 

Simon Ling, MBChB, MRCP(UK)
Division Head
Phone: 416-813-8757

Margaret (Peggy) Marcon, MD, FRCPC 
Director of Ambulatory Services
Phone: 416-813-7734

Binita Kamath, MD, MBBChir, MRCP
Director of Fellowship Training Program
Phone: 416-813-6176

Part-time staff

  • Carol Durno, MD, Gastroenterologist
  • Paul Kortan, MD, Gastroenterologist
  • Gary May, MD, Gastroenterologist
  • Paul Pencharz, MD, Staff Nutritionist
  • Stanley Zlotkin, MD, Staff Gastroenterologist


  • Dr Akshay Kapoor
  • Dr Daniel Mulder
  • Dr Daniela Gattini Valdes
  • Dr Emma Greenaway
  • Dr Ibrahim Shamasneh
  • Dr Jasbir Dhaliwal
  • Dr Koen Huysentruyt
  • Dr Kristen Bortolin
  • Dr Liron Birimberg-Schwartz
  • Dr Michelle Gould
  • Dr Mohammed Ayoub
  • Dr Natascha Silva Sandy
  • Dr Rebecca Little
  • Dr Rilla Schneider
  • Dr Saleh AlQahtani

Nurse Practitioners

  • Karen Frost - BScN, RN(EC), MN, NP
  • Maria de Angelis - MScN, NP-Peds GI Transplant
  • Krista van Roestel - MN, NP-Peds Liver/Intestinal Transplant Program
  • Stacey Lira - BScN, MN, NP-Peds

Clinic Nurses

  • Ashley Cruden - BScN, RN IBD Clinic Nurse
  • Jennifer Stunguris - RN Liver and Bowel Transplant Program
  • Shonette Bhagwandin - RN Liver Clinic
  • Vikki Scaini - RN Clinic Nurse
  • Catherine Jewell - BScN RN General GI Clinic
  • Megan Hipson- BScN RN General GI Clinic
  • Brittany Lyn - BScN, RN IBD Clinic  


  • Inez Martincevic - MSc, RD
  • Veronik Connan - MSc, RD

Administrative Assistants

Margaret Johnson
Phone: 416-813-6555
Fax: 416-813-6531
email: margaret.johnson@sickkids.ca

Shawana Estwick
Administrative Assistant to: Drs. Yaron Avitzur, Vicky Ng and Peter Church 
Phone: 416-813-7654 
Fax: 416-813-4972
email: shawana.estwick@sickkids.ca 

Leann Turner
Administrative Assistant to: Drs. Simon Ling and Catharine Walsh
Phone: 416-813-8757 
Fax: 416-813-6531
email: leann.turner@sickkids.ca 

Clarisse Cacho
Administrative Coordinator to: Dr. Robert Bandsma
Phone: 416-813-5775
Fax: 416-813-5002
email: clarisse.cacho@sickkids.ca 

Thusiga Inderanathan
Administrative Assistant to:  Drs. Nicola Jones, Philip Sherman and Amanda Ricciuto
Fax: 416-813-6531
email: thusiga.inderanathan@sickkids.ca

Sherry Joy
Administrative Assistant to: Dr. Binita Kamath, and Fellowship Training and Residency Programs
Phone: 416-813-6176
Fax: 416-813-4972
email: sherry.joy@sickkids.ca

Suzanne Shek
Administrative Assistant to:  Drs. Thomas Walters, Anne Griffiths 
Phone: 416-813-7734
Fax: 416-813-6531
email: suzanne.shek@sickkids.ca

Sandra Layno
Administrative Assistant to: Drs. Tanja Gonska, Peggy Marcon and Jessie Hulst 
Phone: 416-813-7735
Fax: 416-813-6531 
email: karoline.fiedler@sickkids.ca

Karoline Fiedler 
Assistant to Dr. Aleixo Muise 
Phone: 416-813-6858
Fax: 416-813-6531
email: karoline.fiedler@sickkids.ca

Clinic Flow Coordinators 

Mary Christofi
Phone: 416-813-7282
Fax: 416-813-6526
email: mary.christofi@sickkids.ca

Johnson Le
Phone: 416-813-7270 ext. 1
Fax: 416-813-6526
email: johnson.le@sickkids.ca 

Research Coordinators

  • Claudia Quammie, Clinical Research Project Manager
  • Shannon Vandriel, Clinical Research Project Manager
  • Deepika Sharma, Clinical Research Project Assistant
  • Daniel Cui, Clinical Research Project Coordinator
  • Clarelle Gonsalves, Clinical Research Project Coordinator
  • Julianne Ling, Clinical Research Project Coordinator 

SickKids IBD Program

  • Brian Ngo, Clinical Research Project Assistant
  • Katie Leathem, Clinical Research Project Assistant

Canadian Children IBD Network

  • Ashley Wu, Clinical Research Project Assistant
  • Jeffrey Chow, Clinical Research Project Coordinator
  • Sahar Ehtesham, Clinical Research Program Manager *mat leave coverage for Michelle Ouzounis