Based solely on national market share, the “top” (i.e. largest membership base) Medicare Supplement providers in the country in 2008-2009 were as follows:
1. United Healthcare (driven by AARP contract) 29% market share
2. Wellpoint 8%
3. Mutual of Omaha 6%
4. Health Care Services Corp. 5%
5. Conseco 4%
As you can see, the five largest carriers account for 52% market share, and the remaining 48% is captured by dozens if not hundreds of smaller companies.
When Medicare Advantage and other Medicare products are factored into the mix, like prescription drug plans (PDP), the top four companies would be AARP, Humana, Wellpoint and Universal American respectively.
