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Leadership
James Weber, M.D.
Chief Executive OfficerChief Executive Officer, Chairman of the Board
Benjamin Griffith
President
Paul J. Berggreen, M.D.
Chief Strategy Officer
J. Casey Chapman, M.D.
GastroenterologistChief Medical Officer
Physician Executive
Chief Medical Officer
Physician Executive
Chief Medical Officer
Kate Conklin
Chief Ethics and Compliance Officer
Dina Dunn
Chief People Officer
Patric Edmondson
Chief Information Officer
Stephanie Morris
Chief Financial Officer
Gregory TenBarge
Chief Revenue Officer
James Weber, M.D.
Chief Executive OfficerChief Executive Officer, Chairman of the Board
Paul J. Berggreen, M.D.
Chief Strategy Officer
Mitchell Bernsen, M.D.
GastroenterologistGovernor of Midwest Division (IGG)
Joseph Cappa, M.D.
GastroenterologistGovernor of Northeast Division (CTGI)
J. Casey Chapman, M.D.
GastroenterologistChief Medical Officer
Physician Executive
Chief Medical Officer
Physician Executive
Chief Medical Officer
Harish Gagneja, M.D.
GastroenterologistGovernor of South Texas Division (AG)Physician Executive
Kumar Gutta, M.D.
GastroenterologistGovernor of Central Division (TDDC)Physician Executive
L. Phillips Jenkins, M.D.
Member At-Large (GGE)
Steven Kaptik, M.D.
GastroenterologistMember At-Large (WAGI)
Omer Khalid, M.D.
GastroenterologistMember At-Large (GSI)
Ronald P. Kotfila, M.D.
GastroenterologistGovernor of Southeast Division (GIA-MS)
Kevin Liebovich, M.D.
GastroenterologistMember At-Large (IGG)
Jeffry Nestler, M.D.
GastroenterologistGrowth and Development Officer
Zarema Singson, M.D.
GastroenterologistMember At-Large (GCSA)
Jason Sugar, M.D.
GastroenterologistMember At-Large (WAGI)
Karlee Ausk, M.D.
Gastroenterologist
Sarah Canavan, M.D.
Gastroenterologist
Joseph Cappa, M.D.
GastroenterologistGovernor of Northeast Division (CTGI)
Vernon J. Carriere Jr., M.D.
Gastroenterologist
J. Casey Chapman, M.D.
GastroenterologistChief Medical Officer
Physician Executive
Chief Medical Officer
Physician Executive
Chief Medical Officer
William Chen, M.D., FACG, AGAF
Gastroenterologist
Ryan Cho, M.D.
Gastroenterologist
Nancy Farrar, P.A.
Clinical Information Executive
Karthik Garapati, M.D.
Gastroenterologist
Adam B. Gluskin, M.D.
Gastroenterologist
Omer Khalid, M.D.
GastroenterologistMember At-Large (GSI)
Jeffry Nestler, M.D.
GastroenterologistGrowth and Development Officer
Neil Parikh, M.D.
Gastroenterologist
Bhavin Patel, M.D.
Gastroenterologist
Jason Roberts, M.D.
GastroenterologistPhysician Executive
Rushikesh Shah, M.D.
Gastroenterologist
James A. Underwood Jr., M.D.
Gastroenterologist
Our GI Alliance Research Team is comprised of individuals motivated to do what is best for our patients and lead a highly skilled team to address your specific needs.
Physician Leadership
George E. Catinis, M.D.
Gastroenterologist
Education Program Director
Education Program Director
J. Casey Chapman, M.D.
GastroenterologistChief Medical Officer
Physician Executive
Chief Medical Officer
Physician Executive
Chief Medical Officer
Timothy Ritter, M.D.
GastroenterologistPhysician Executive
Senior Medical Research Director
Senior Medical Research Director
Jonathan Rosenberg, M.D.
GastroenterologistPhysician Executive
Regional Medical Research Director
Regional Medical Research Director
Harry Sarles, M.D.
GastroenterologistSenior Associate Medical Director
Physician Executive
Senior Associate Medical Director
Physician Executive
Senior Associate Medical Director
Chirag D. Trivedi, D.O.
Gastroenterologist
Regional Medical Director
Regional Medical Director
Administrative Leadership
Matthew Burkemper
Senior Research Director
Melinda Dollar-Wilson
Director of QA/QC
Rosanna Vazquez
Director of Finance
Nicole Rodriguez
Program Coordinator
Milhen James
Contracts Manager
Amanda Hatley
Education Coordinator
Jo Ann Gilbert
Regulatory Manager
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