Highmark Health proposes affiliation with BCBS Kansas City Modern HealthcareHighmark announces affiliation with Blue Cross Blue Shield of Kansas City TribLIVE.comPittsburgh-based Highmark’s Midwest acquisition promises $3.1 billion in new revenue Pittsburgh Post-GazetteHighmark, Blue Cross KC announce affiliation plans Fierce HealthcareKansas City’s largest nonprofit health insurer joins forces with national Blue Cross operator The Business Journals