I used a company called aeroflow, go to the website aeroflow.com fill in your doctors info and insurance and they do the rest they contact you to select the pump option you want once approved then it gets shipped to you all free of charge.
call your Insurrance company. they can tell you. because not all of them have the same,ways to get one
I have blue cross blue shield and I called them and they gave them the names of medical equipment supplier vendors that they work with. I then called the vendor and placed the order and had my pump 2 weeks later and it was free. Call your insurance and go from there :) @afa2015