Progenity Bill

We did the progenity blood test over two months ago. We received the results very quickly, but we have yet to receive a bill in the mail. At my last appointment, a month ago, I asked the woman at the front desk about this. She said don’t worry about it and that it should come anyway now..... welllllll idk if I should be worried? I mean, don’t get me wrong, I’m happy to not have to pay a bill 😂😂😂

But in all seriousness... I find it odd. Has anyone done the progenity test and found it took a long time to receive the bill?