What Is The Number One Health Insurance Company In The Us? 
There really is not a `` Number 1 '' health insurance company in the US . Although UnitedHealthcare , Aetna , Wellpoint and Cigna are among the largest companies , everyone 's opinion regarding who is the `` best '' insurer will vary . For example , in Pennsylvania , Independence Blue Cross and Highmark are very popular . In Ohio , Medical Mutual is quite popular . So naturally , where you live will greatly influence your opinion . 