Anyone know of a Gastrointestinal doctor in the DFW area in Texas that accepts AMERIGROUP?

Hi, I'm having a little bit of trouble trying to find a GI doc that accepts Amerigroup insurance. I have gallstones and have been told more than once that I need to get my gallbladder removed. Ive already had 2 gall bladder attacks..so i'm needing to do this soon, and unfortunately amerigroup is the only insurance I have right now. Does anyone know of a doctor in the Dallas Fort Worth area that accepts amerigroup? Also, I was wondering if anyone knows why the hospital can't do the surgery, if they accept my insurance? Or do they normally just do the surgery if it is an emergency? Thanks for your help!!