I am not the one to argue with but I am warning you of possible problems with your approach. You might get the policy and be refused coverage when you desire it. You would then be stuck without the premium you paid and without coverage. Your only option would be to take them to court and hope the court decides in your favor. If you had taken out the policy a year or two ago, you would have had a stronger case but when you take it out a few months before the procedure, your case may set off warning bells at the insurance company.
As always, read the fine print carefully because it can cause real problems if you don't.