Are rental cars at airport facilities automatically covered for Primary auto insurance?

renting at LAXAre rental cars at airport facilities automatically covered for Primary auto insurance?
You can get coverage using your own insurance or you can pay extra to use the coverage they offer. It's usually around $20 a day. If you use your coverage just make sure you have more than liability and you have your insurance card with you. Sometimes they call and ask what kind of coverage you have. I think you also have the option not to purchase any insurance at all. But it will be painful if you have an accident.