GastroIntestinal Specialists, A.M.C. is the largest independent gastroenterology group in Northwest Louisiana. Our 13 physici ... ans and 11 mid-level practitioners are dedicated to providing personalized care for patients experiencing problems related to the digestive tract. Physicians: Humberto I. Aguilar, MD John N. Bienvenu, MD David F. Dies, MD James C. Hobley, MD Sathya N. Jaganmohan, MD Lawrence Webster Johnson, MD John A. Kirkikis, MD Nicolas T. LaBarre, MD Abby D. Linzay, MD David M. Philips, MD Arthur L. Poch, MD John Mark Provenza, MD Douglas E. Rimmer, Jr., MD read more