What Us States Have Best Access To Health Insurance / health Care?

My mother is trying to figure out somewhere she can move where she will be guaranteed access to health insurance regardless of her health problems. She lives on a very small budget and cannot afford outrageous premiums.

I have heard that some states guarantee access to health insurance regardless of medical conditions, and I am hoping someone can tell me if this is true, and which states do this.

Or if someone could point me in the direction of a website that has this information that would also be helpful.