I have Aetna’s HMO, which supposedly covers iontophoresis machines. My dr. wrote a prescription for a Fischer unit and Fischer has told me their units are not covered because they are out of network. I called Aetna to find out which unit they will cover and all they want to do is e-mail me lists of medical equipment distributors. I don’t know where to go next. Does anyone know which units Aetna will cover? They are not being helpful, to say the least.