What Are The Largest Health Insurance Companies In The US? 
Among the largest health insurance companies in the United States are UnitedHealthcare , Wellpoint , Aetna , Cigna and Independent Blue Cross . Of course , there are many reputable carriers that offer affordable medical coverage to individuals , families and businesses . There are also many regional insurers -LRB- such as Medical Mutual in Ohio -RRB- that offer very competitive rates to local customers . Is largest the best ? Not always , although it never hurts to start the quote process with a large company . They do tend to have large -LRB- sometimes countrywide -RRB- Networks of physicians and hospitals . 