About Thomas-Spann Clinic. Thomas-Spann Clinic is a group practice with 1 location. Currently, Thomas-Spann Clinic's 22 physicians cover 16 specialty areas of medicine. Thomas-Spann Clinic Office Locations. Thomas Spann Clinic Pa. 7121 S Padre Island Dr Ste 300 Corpus Christi, TX 78412 (361) 696-6200. Monday :.