If I understand correctly, your doc’s role is crucial but limited. He/she must certify you need the CGM via a letter of medical necessity. Switch docs if your current one won’t agree to fill out the letter of necessity. After that, if insurance denies it, the fight is between you and the insurance company. Your doc has already certified that the CGM is medically necessary so all you need from your doc at that point is a copy of the denial paperwork. Then you file an appeal with your insurance company which goes to a different department of the company, not their customer service department. Customer service can put you off, lie, forget, etc, but once you initiate a formal appeal by mail, there will be a paper trail and it becomes a contractual matter between you and the company. I forget who it is but there is a very knowledgeable person here at tudiabetes who has explained how to achieve CGM coverage.
If forget who wrote the following:
“Learn your policy. Keep a log–names dates and times of everyone you talk to, everything you mail and the cert#'s and return receipt stubs. Keep fax confirmations and mail everything certified mail that is important. When doing so make sure each piece of paper that you enclose in the certified mail has the certified mail # on it–this is an important step.”