I received the bill from the company Chicago Heart and Vascular Co. They stated that I owed them about $300 for the services, which I already paid off. I contacted them and the lady-agent told that my insurance company declined to pay. I knew that it was scam, because my insurance company informed me about everything. I checked the insurance company. Everything was ok. They are liars and thieves. They hope to get more money from you and tell you different stupid things. Don’t believe them and post comments about your situation with this company.