Central States Indemnity Medicare supplemental insurance gets the rating of A+ from the independent AM Best. Central States new rating is effective as of June 14th 2013. For those who compare the financial strength of the Medicare Supplemental insurance companies when shopping for a Medigap plan this may push you towards purchasing a CSI Medicare supplement. Central States is a Berkshire Hathaway Company and well know in the Medicare Supplement insurance industry. Enter your zip code and request quotes today to see who has the best rate in your area. Maybe a Central States Medicare supplement plan is the right plan for you.