UnitedHealthcare is the largest insurer in both the commercial and Medicare Advantage markets with 51.3 million members, while Blue Cross and Blue Shield companies collectively have the largest geographic footprint.
Elevance Health, formerly Anthem, is the largest insurer by market share in 82 of 383 metro areas, according to the study. Health Care Service Corp.. which sells Blue Cross and Blue Shield plans in Illinois, Montana, New Mexico,…