San Antonio, Texas 78229. Stone Oak 1434 East Sonterra Blvd, Suite 210 San Antonio, Texas 78258. Texsan - Heart Plaza Location 6800 IH10 West Suite 375 San Antonio, Texas 78201. Boerne 34910 IH10 West Boerne, Texas 78006 Phone: (210) 690-7400 Fax: (210) 690-7405.