BCBSIL is probably the largest in Chicago area. I ...

BCBSIL is probably the largest in Chicago area. I would stay away from their HMO's, it's just too complicated and an administrative blame game. It should be as easy is asking for a referral from your doctor and going but no, it's always messy. NO MEDICAL OFFICE in the USA will tell you they are 'in network' with your insurance, healthcare system is broken. I've had major billing issues with BCBSIL that were eventually solved due to computer systems issues on their end. That being said, they are like the Comcast of Chicago and the medical offices know how to work with them. Even with a two star rating, I would have to recommend BCBSIL over other providers in the Chicago area.