So of course, my insurance would only pay some small pittance, if anything, and I was sent a ~$1000 bill. I immediately filed a complaint with the insurance company's California regulator (at the time it was the Dept of Insurance for this one, but it seems most or all now are under the Department of Managed Health Care) since insurance companies are by law obligated to pay at the in-network rate in the case of an emergency (which presumably is why you call an ambulance in the first place). Within 2 weeks I received a letter from the insurance company that all was completely fine and that they'd corrected the situation and paid the bill.
So we have an insurance company which surely knows that law, surely knows what an ambulance is for, but has discovered the "life hack" of having an extremely inadequate network, simply refusing nearly every ambulance claim made in the City, and then only paying the small percentage who know the law and know how to file a complaint. And of course, there's no punishment, the punishment is just having to pay the few times they're caught.
And insurance companies wonder where all that anger (Delay, Deny, Depose, was it?) comes from.
Anyway, practical moral of the story: don't let them get away with doing that if it happens to you or someone you know!
Note: My story is obviously kind of tangential to the actual article which explains why the cost is so high due to everyone who's being subsidized by what they're charging privately-insured patients. However, I have but the world's tiniest violin for those extremely profitable insurance companies who would obviously really like one of their costs of doing business to just go away. Yeah, I'd also like it if I could be paid my full salary, even though I refuse any work I find annoying.