insurance
That is not an easy question to answer. It depends on so many things, including on the insurance company and how long they have to approve. for example if a company has 21 days to say yes or no, some will take the entire 21 days, others will get back to the doctors office in a week or so. Have you checked with the surgeons office, they should know on average how often that particular company takes.
my revision approval took 7 working days.