That's really great, and their prices are very reasonable to be sure.
Is $90,000 for a lumbar fusion reasonable?
Yeah - I’d imagine if you needed that there are very few people that can do it. It’s a very difficult procedure to be sure. You could try and negotiate the price with the people that are doing the surgery and responsible for the aftercare.
As this whole discussion illustrates, it's near impossible to know with the current system.