GastroIntestinal Specialists, A.M.C. is an independent digestive health clinic that aims to provide personalized care for our patients. Skip to content PAY BILL ONLINEPATIENT PORTAL318-631-9121 Search for: ABOUT HOSPITAL AFFILIATIONS CAREERS PHYSICIANS Dr. HUMBERTO AGUILAR Dr. JOHN BIENVENU Dr. DAVID DIES Dr. JAMES HOBLEY Dr. SATHYA JAGANMOHAN.