1-866-860-4062 is almost certainly 100% a scam. They call me all the time even after I've been asked to be removed from their list. Apparently they think I'm someone else because they ask for someone that is not me. They call at least 10 times a week. If this were a legitimate company they would hire people who could speak English well and would drop you from their call list if asked.
I encourage anyone who receives a call from this number to act very interested in their health insurance. If you can keep them on the line long enough, it will waste their resources and prevent them from reaching some old person who is about to be taken. If you have time, keep them on the phone as long as possible and drain the resources of these scammers. These people disgust me.
I selected "telemarketer" from the dropdown menu, but telemarketers are usually legitimate. These people are almost certainly crooks.