How Many Health Insurance Companies Are There In The US? 
There are quite a few health insurance companies in the US . The biggest ones -LRB- or some of them -RRB- are UnitedHealthcare , Wellpoint , Cigna , Humana , Aetna and Independent Blue Cross . There are many smaller carriers such as Assurant and Celtic and regional carriers such as Geisinger . UPMC and Highmark are two big companies in Pa. . The number of top-notch carriers to consider is between 50 and 100 as a rough estimate . 