The Blue Cross Blue Shield Tower (BCBS) is located on the north end of Millennium Park along E. Randolph Street at the NE corner of Randolph and Columbus Drive, in Chicago, Illinois, United States of America. It is home to the headquarters of Health Care Service Corporation. The building's address is 300 E. Randolph and is located next to the Aon Center. Original plans had hoped to connect the two buildings via an underground pedway, but the plans never came to fruition.