It must depend on your location? My neurologists office works with a medical O2 supply company and even though our health insurance which normally covers almost everything won't pay so the supply company was perfectly willing to accept payment via credit card. In other words, my script for oxygen didn't go though our pharmacy at all but rather directly to the company that supplies the oxygen --- The big plus for me was that they delivered it directly to our home.
And I even got an extra tank so I can have one to keep in my office.
To me the expense was nominal as $25 per tank and a one time $25 fee for the supplies to go with (2 masks and the regulator valve).
