2009 GastroenterologyThai Medical Council, Thailand.
2009 Internal MedicineThai Medical Council, Thailand.
2008 GastroenterologyAmerican Board of Internal Medicine, United States.
2007 GastroenterologyRoyal College of Physicians and Surgeons of Canada, University of British Columbia, Canada.
2006 Internal MedicineRoyal College of Physicians and Surgeons of Canada, University of British Columbia, Canada.
2005 Internal MedicineAmerican Board of Internal Medicine, United States.