What Slimmer said for sure!
But also to add to this, I've called many a doctors and have one thing that's consistent among all of them. Unless you have a life threatening or terminal disease the doctor will not help you get your insurance to cover it as they can lose their license. NOW there are plenty of docs who will and they don't care. If you know one, well good for you.
If you don't getting a script is simple as calling an anti aging doc and paying the nice premium they charge. Then you have to call the lab and they can actually help you create a case to get your insurance to cover it. You have to get the script then work through the lab. It's also my understanding that due to the price of HGH, that line is very long with most major US labs.
But again what Slimmer said!!