- 2020MemberAbstract Selection Committee, ISHLT Annual Meeting, International Society for Heart and Lung Transplantation (ISHLT) 
- 2020MemberAbstract Selection Committee, American College of Gastroenterology (ACG) 
- 2019MemberAbstract Selection Committee: Functional Dyspepsia, Nausea and Vomiting, Digestive Diseases Week, American Gastroenterological Association 
- 2018MemberAbstract Selection Committee: Functional Dyspepsia, Nausea and Vomiting, Digestive Diseases Week, American Gastroenterological Association 
- 2018MemberAbstract Selection Committee, American College of Gastroenterology (ACG) 
- 2017MemberAbstract Selection Committee: Functional Dyspepsia, Nausea and Vomiting, Digestive Diseases Week, American Gastroenterological Association 
- 2017 - presentFellowAmerican College of Gastroenterology (ACG) 
- 2017 - presentExpert Panel MemberFunctional GI Health and Nutrition Circle Expert Panel, American College of Gastroenterology (ACG) 
- 2016 - 2017Task Force MemberTask Force on Functional Bowel Disease, American College of Gastroenterology (ACG) 
- 2014 - presentMemberResearch Committee, American Neurogastroenterology and Motility Society 
- 2013 - 2014Task Force MemberTask Force on Functional Bowel Disease, American College of Gastroenterology (ACG) 
- 2012MemberAbstract Selection Committee: FGIDs, Digestive Diseases Week, American Gastroenterological Association 
- 2011OrganizerClinical Practice Symposia, Digestive Diseases Week, American Gastroenterological Association 
- 2011 - presentAdvisorBoard of Advisors, IBS Centers of Education and Expertise, Regional IBS Expert, Gastrointestinal Health Foundation 
- 2010OrganizerClinical Practice Symposia, Digestive Diseases Week, American Gastroenterological Association 
- 2010MemberAbstract Selection Committee: Gastroparesis, Digestive Diseases Week, American Gastroenterological Association 
- 2009Grant Application ReviewerInternational Rome Committee 
- 2007 - 2011MemberExecutive Committee, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2007 - presentDirectorGI Epidemiology/Outcomes Unit, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2007 - presentMemberDivision of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2006 - 2010Co-DirectorGI Diagnostic Laboratory, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2006 - 2009MemberResearch Committee, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2006Grant ReviewerSeed Grant Proposals, University of North Carolina 
- 2004MemberEducation Committee, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2002 - 2008Protocol ReviewerResearch Committee, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2002 - 2007MemberEsophageal Interest Group, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2002 - presentMemberMotility Interest Group, Division of Gastroenterology and Hepatology, Department of Internal Medicine 
- 2001 - presentMemberAmerican Neurogastroenterology and Motility Society 
- 2001 - presentMemberGastroenterology Research Group, American Gastroenterological Association 
- 2000MemberAmerican Society for Gastrointestinal Endoscopy 
- 2000 - presentMemberSigma Xi, The Scientific Research Society 
- 2000 - presentMemberAmerican Gastroenterological Association 
- 2000 - presentMemberFunctional GI Research Group, American Gastroenterological Association 
- 2000 - presentMemberAmerican College of Gastroenterology (ACG) 
- 1999 - presentMemberDelta Omega Honorary Public Health Society, Alpha Chapter, Johns Hopkins Bloomberg School Of Public Health 
- 1998 - presentParticipantDigestive Diseases Week, American Gastroenterological Association 
- 1998 - presentParticipantAmerican College of Gastroenterology (ACG) 
- 1996 - 1998MemberCommunity Medicine Primary Care Clinic Committee, Department of Internal Medicine 
- 1995 - presentMemberAmerican Medical Association 
- 1995 - presentMemberAmerican College of Physicians-American Society of Internal Medicine 
- 1995 - presentMemberMinnesota Medical Association 
- 1995 - presentMemberZumbro Valley Medical Society, Minnesota Medical Association 
- 1994 - 1995Student RepresentativeAdmissions Committee, The Johns Hopkins University School of Medicine