AMEXCARE is the new insurance billing company for Hospital San Antonio, one of many in their worldwide network. Their local representatives (Kate or Gabriel) are physically located directly inside the hospital. Both are extremely helpful.
Contact info: 55 9161 9998 (Kate); 55 4810 9903 (Gabriel)
*On a separate note, for those who are already members of Lakeside Medical, they still function locally and now handle the billing services for Ribera Medical Center, located directly across from El Dorado on the Libramiento.
Hope this info helps everyone!