First let me say thanks to the many on this board...There was lots of info flying around about getting a prescription for VX770 Kalydeco. I called Vertex Pharma and asked would they fill a prescription if I did not have the G155 mutation. The answer YES!. As long as my DR. will prescribe it and insurance or I am willing to pay for it ie. cash, they will fill that script through one of thier pharmacies that has it. Now when they put in the order there is a form that asks do you have g155...Feel free to check no if you don't have it. It is then up to your insurance company to go ahead and pay for it or not. Again this is coming from Vertex. The way I asked my question is by offering to pay cash.So taking all the insurance and financial asssitance out of the picture the company will sell it as long as you have a prescription....