What happens when your insurance changes its requirements and you have pre-approval?

I was pre-approved by Aetna HMO in December. My surgery is scheduled for April. I just found out that Aetna changed its requirements for surgery. I am afraid to contact them because it might make them research my case and deny me coverage. Has anyone faced this problem and if so were you denied coverage after getting pre-approval?

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.

You must be logged in to post an answer. Click here to log in.