The Detroit-based insurer operates its own Medicare Advantage plans, as well as plans in Iowa, North Dakota, South Dakota and Vermont through partnerships with other BCBS plans.
Overall Medicare Advantage growth slowed in 2025. The program added only 1.3 million members year over year in 2025, a smaller number than in pervious years.
Here are the 10 largest BCBS plans by Medicare Advantage enrollees in 2025. This list does not include plans owned by Elevance Health, which has 2.3 million members.
Note: This list does not include non-BCBS-branded plans owned by the same parent company, or Medicare Part D plans.
- Blue Cross Blue Shield of Michigan: 787,763
- Highmark Health: 436,509
- Blue Cross Blue Shield of Minnesota: 248,400
- Health Care Service Corp: 235,617
- BlueCross BlueShield of Tennessee: 202,022
- Excellus Blue Cross Blue Shield only: 195,701
- Blue Cross and Blue Shield of North Carolina: 156,561
- Florida Blue: 147,802
- Blue Shield of California: 135,835
- Independence Blue Cross: 118,424